Alternate costume (SSBU)

NOTE: Every claimed source needs a cross-reference link; claimed sources need to be plausible, not awfully obscure; default costumes usually don't need descriptions since they are not alternate costumes; returning costumes original to Smash do not need references to their appearances in previous Smash games.

Byleth's male and female alternate costumes

A lineup of Sora's alternate costumes

Each character in Super Smash Bros. Ultimate has a set of alternate costumes that feature different colors or designs. Due to the presence of 8-Player Smash, all characters have eight costumes except for the 3 Mii Fighters, which have a variety of costume options.

Some characters possess certain alternate costumes with more drastic design differences, and are not merely recolors of their standard outfits. Mario, Piranha Plant, Wario, Link, Zero Suit Samus, Ridley, Ike, Isabelle, Little Mac, Shulk, Cloud, Bayonetta, Joker, Sephiroth, Kazuya and Sora have different outfits available; Hero's costumes represent different protagonists across the Dragon Quest series; Pikachu, Pokémon Trainer, Villager, Wii Fit Trainer, Robin, Corrin, Inkling, and Byleth all have male and female variants; and Olimar, Bowser Jr., and Steve have model swaps that change them into different characters with different names, complete with corresponding voice and announcer clips, though like all other alternate costumes, they bear no gameplay differences.

In Ultimate, the game loads default costume character portraits on the character selection screen first, and then loads alternate costume portraits in fighter number order, with the exceptions of transformation characters, who are loaded first. This can result in characters' alternate costume portraits not being displayed for several seconds, as the game is still loading them.

Banjo & Kazooie

Brown	Based on their appearances in Banjo-Kazooie and Banjo-Tooie.
Pink	Banjo resembles Mumbo Jumbo, the helpful shaman. Kazooie resembles her color scheme from Banjo-Kazooie: Nuts & Bolts.
Black	Banjo resembles Bottles, the move-teaching mole. Kazooie resembles one of her four possible colors in Banjo-Tooie's multiplayer Squawkmatch minigame as well as Heggy from Banjo-Tooie.
Red	Banjo resembles his sister Tooty, with her blonde hair represented by his yellow backpack. The red fur and blue clothing also cause him to bear a resemblance to Conker from Conker's Pocket Tales, another Rare Ltd. character. Kazooie resembles one of her four possible colors in Banjo-Tooie's Squawkmatch. She also resembles a chained breegull from Banjo-Kazooie: Grunty's Revenge.
White	Banjo resembles Boggy the polar bear, while Kazooie resembles a real-life gentoo penguin.
Yellow	Banjo resembles one of his possible colors in Banjo-Tooie's Squawkmatch. Kazooie resembles Terry the pterodactyl, the boss of Terrydactyland in Banjo-Tooie.
Blue	Resembles the respective colors of their names in the Banjo-Kazooie series logo, and by extension, Split-Up Pads from Banjo-Tooie. Banjo also resembles one of his four possible colors in Banjo-Tooie's Squawkmatch.
Green	Resembles Gruntilda Winkybunion's green skin, black clothing, and purple scarf. This is the only skin that changes the color of Banjo and Kazooie's eyes and Banjo's necklace, as well as changing the color pattern of his shorts. They also bear a resemblance to Yooka & Laylee, the titular protagonists from Yooka-Laylee, a spiritual successor to Banjo-Kazooie developed by several former Rare Ltd. developers.

Bayonetta

Half of Bayonetta's costumes are based on her design from Bayonetta 2, while the other half are based on her design from Bayonetta. For the former half, she wields Love is Blue, which has blue attack trails. For the latter half, she wields Scarborough Fair, which has red attack trails, and speaks English even in the Japanese version (referencing how the original release of Bayonetta for the Xbox 360 and PlayStation 3 did not have a Japanese dub). Her Bullet Climax has slightly different sound effects for the two different costume types.

Black	Based on her appearance in Bayonetta 2.
Original	Based on her appearance in Bayonetta.
Yellow	Resembles her yellow alternate color from Anarchy Reigns.
Green	Resembles her green alternate color in Anarchy Reigns.
Red	Based on Jeanne, Bayonetta's friendly rival. The hair visible in her Wicked Weaves and on Gomorrah is also colored white.
Pink	Resembles her time-displaced, younger self whom she watches over in Bayonetta.
White	Resembles the platinum and pure platinum trophies in Bayonetta 2, which depict her in a silvery color scheme.
Blue	Resembles her blue alternate color in Anarchy Reigns.

Bowser

Default	Based on his appearance in Super Mario Odyssey.
Black	Combines elements of his black and brown costumes from Brawl.
Yellow	Resembles Ludwig von Koopa's appearance and Lemmy Koopa's appearance in Super Mario World.
Green	Resembles one of his alternate colors in Mario Golf and his in-game sprite from Super Mario World.
Grey	Resembles Morton's original design from Super Mario Bros. 3 and Super Mario World.
Orange	Resembles Giga Bowser from Super Smash Bros. Melee.
Red	Resembles one of his alternate colors in Mario Golf.
Blue	Based on Bowser's Brother from Super Mario Bros.: The Lost Levels. It also resembles one of his alternate colors from Mario Golf.

Bowser Jr.

Instead of alternate color schemes, Bowser Jr.'s alternate costumes consist of the Koopalings. Bowser Jr.'s Junior Clown Car is the only one with black eyes and horizontal orange "eye paint", while the Koopalings' mass-produced Clown Cars have yellow mechanical eyes with vertical black "eye paint". Aside from Roy and Morton, whose positions are swapped, the Koopalings are listed by the order they are fought in Super Mario Bros. 3.

Junior	Bowser Jr. is piloting his Junior Clown Car first seen in New Super Mario Bros. Wii.
Larry	Replaced with Larry Koopa.
Roy	Replaced with Roy Koopa.
Wendy	Replaced with Wendy O. Koopa.
Iggy	Replaced with Iggy Koopa.
Morton	Replaced with Morton Koopa Jr.
Lemmy	Replaced with Lemmy Koopa.
Ludwig	Replaced with Ludwig von Koopa.

Byleth

Half of Byleth's costumes are male, while the other half are female.

Male	The male design for Byleth.
Female	The female design for Byleth.
Blue	Based on the color scheme of Dimitri. The dagger's color scheme is changed to match the one he gave Edelgard.
Red	Based on the color scheme of Edelgard. She wears white gloves, and the tights are made opaque red rather than patterned lace.
Yellow	Based on the color scheme of Claude.
Green	Based on the color scheme of Sothis. The tights are colored to appear bare. Also resembles the Sothis Regalia, a DLC outfit from the Three Houses Expansion Pass.
Black	Male Byleth after fusing with Sothis.
Grey	Female Byleth after fusing with Sothis.

Captain Falcon

Indigo	Based on his standard appearance in F-Zero GX.
Black	Based on his appearance in the Japanese commercial for F-Zero X.
Red	Based on Blood Falcon, Captain Falcon's evil clone and rival. It is his only costume with a unique logo on the back: a skull with "Blood Hawk" (the name of Blood Falcon's vehicle) written underneath. Exclusively in the Japanese version, this instead reads "Hell Hawk".
Green	Reminiscent of Wild Goose's color scheme.
Blue	Resembles his appearances in the original F-Zero and F-Zero: GP Legend.
White	Resembles Jody Summer's original appearance in F-Zero X.
Yellow	Possibly based on Dr. Stewart and the Golden Fox's color scheme.
Cyan	Reminiscent of Rick Wheeler from the anime F-Zero: GP Legend.

Chrom

Blue
Red	Resembles Walhart, an antagonist in Fire Emblem Awakening.
Green	Resembles Stahl, one of Chrom's Shepherds in Awakening.
Yellow	Resembles Owain, Chrom's nephew from Awakening.
Black	Resembles Chrom's concept art and portrait in-game in Awakening.
Purple	Resembles Sumia, one of Chrom's potential wives from Awakening, or alternatively Yen'fay, a minor antagonist also from Awakening.
White	Resembles Kellam, one of Chrom's Shepherds from Awakening.
Cyan	Resembles the color scheme of his outfit in Tokyo Mirage Sessions #FE.

Cloud

Half of Cloud's costumes are based on his appearance in Final Fantasy VII, while the other half are based on his "Cloudy Wolf" design from Final Fantasy VII: Advent Children. In two of his Advent Childen costumes, his Geostigma-infected arm is covered by a sleeve, while it is exposed in the other two, revealing the red ribbon he wrapped around it in memory of Aerith Gainsborough.

As of Sephiroth's official release, Advent Children Cloud uses Omnislash Ver. 5 as his Final Smash rather than the standard Omnislash, which is mostly a cosmetic difference; however, the explosion resulting from the move's final hit has slightly different properties regarding the direction in which it launches enemies who were not caught by the rest of the move, thus technically making Cloud the only character in the game with a gameplay difference between his costumes.

Purple	Based on his appearance in Dissidia Final Fantasy.
Advent	Based on his appearance in the movie Final Fantasy VII: Advent Children. It is referred to as either his "Advent Children costume" or his "Cloudy Wolf" design.
Blue	Resembles the 3rd-Class SOLDIER uniform from Final Fantasy VII.
Advent Blue	Resembles the 3rd-Class SOLDIER uniform from Crisis Core: Final Fantasy VII.
Red	Resembles his alternate recolor from Ehrgeiz: God Bless the Ring which was based on the 2nd-Class SOLDIER uniform from Final Fantasy VII.
Advent Black	Based on his appearance in Advent Children after his fight with Bahamut SIN, during which his sleeve is torn off, revealing a red ribbon commemorating Aerith.
Brown
Advent Purple	Resembles the 2nd-Class SOLDIER uniform from Crisis Core: Final Fantasy VII. Also an alternative costume in Dissidia Final Fantasy NT.

Corrin

Half of Corrin's costumes are male, while the other half are female.

Male	Based on the default customization settings for the Nohr Prince in Fire Emblem Fates.
Female	Based on the default customization settings for the Nohr Princess in Fates.
Red	Resembles Saizo, the elder twin of their retainer Kaze from Fates and the overworld sprites of enemy units in the Fire Emblem games.
Orange
Blue
Pink	Resembles the overworld sprites of Valla-aligned units from Fates as well as the flames emitted by Omega Yato.
Green	Resembles the overworld sprites of allied units in the Fire Emblem games.
Black	Resembles her appearance as a Nohr Noble in Fates.

Daisy

Orange	Based on her current appearance in Mario Party 4 onwards.
Green	Resembles Peach's appearance on the title screen of NES Open Tournament Golf.
Pink	Resembles Peach's appearance in Super Mario Bros. 2 and Super Mario Bros. 3, where her sprite had brunette hair.
Blue	Resembles her appearance on the title screen of NES Open Tournament Golf.
Red
Purple	Resembles her appearance in the Short Game mode from Mario Tennis.
White	Resembles a wedding gown. It is complementary to Princess Peach's wedding costume. The artwork for this alternate costume displays Daisy's crown colored gold while it's actually colored white in-game.
Black

Dark Pit

Black
Green
Brown	Resembles Magnus from Kid Icarus: Uprising.
Yellow
Red	Resembles Twinbellows as it appears in Kid Icarus: Uprising. The wings are a much lighter shade of gray to represent its exposed spine.
Blue
White	Resembles Pit. Dark Pit retains his black wings and gains a red scarf, likely to better differentiate the two. It is complementary to Pit's "fallen angel" costume.
Purple	Bears a slight resemblance to the Eggplant Wizard enemies from the Kid Icarus games.

Dark Samus

Blue	The design is a combination of her organic features and color scheme from Metroid Prime 2: Echoes and her redesigned Phazon Suit from Metroid Prime 3: Corruption.
Green
Purple	Resembles Gandrayda from Metroid Prime 3: Corruption.
Red
Yellow	Resembles the Golden Torizo from Super Metroid.
Grey	Resembles concept art of her from Metroid Prime 2: Echoes.
Black	Resembles Orange Phazon, her original incarnation as the Metroid Prime from Metroid Prime, or Spire from Metroid Prime Hunters.
Pink	Resembles Zazabi from Metroid Fusion.

Diddy Kong

Red
White	The vest is reminiscent of Diddy Kong's alternate outfit in Donkey Kong Country's Two-Player Contest mode.
Pink	Resembles Dixie Kong, Diddy Kong's girlfriend, with her blonde ponytail represented by his yellow fur.
Purple	Resembles his appearance in Donkey Kong Country 2: Diddy's Kong Quest's Two-Player Contest mode.
Green	Resembles one of his alternate costumes from Donkey Kong 64's Multiplayer Mode.
Blue	Resembles Kiddy Kong, Dixie's partner in Donkey Kong Country 3: Dixie Kong's Double Trouble!
Yellow	Resembles a real-life chimpanzee.
Cyan	Resembles Donkey Kong Jr. as he appears in Donkey Kong Jr. Math.

Donkey Kong

Brown	Based on his modern design first seen in Donkey Kong Country.
Black	Resembles a real-life gorilla. The tie is reminiscent of Donkey Kong's appearance in Donkey Kong Country's Two-Player Contest Mode.
Red	Resembles the original D.K. from Donkey Kong.
Blue	Resembles one of his alternate costumes from Donkey Kong 64's Multiplayer Mode. It also resembles one of his alternate colors from Mario Golf.
Green	Resembles one of his alternate colors in DK: King of Swing's Jungle Jam mode.
White	Referred to as "Yeti DK" on the Brawl DOJO!! Resembles the mythical yeti. It also resembles the Fire Mini Donkey Kongs from Mario vs. Donkey Kong, and Eddie the Mean Old Yeti from the Donkey Kong Country TV series. It is also similar to Super Kong from Donkey Kong Country Returns and Tropical Freeze, only with the tie still being red rather than blue.
Yellow	Resembles one of his alternate colors in DK: King of Swing's Jungle Jam mode.
Pink	Resembles Junior (II) from Donkey Kong Jr. Math.

Dr. Mario

White	Resembles his appearance in Dr. Mario 64, but with navy jeans instead of white trousers.
Red	Resembles the color scheme of Fever, the red virus from the Dr. Mario series.
Blue	Resembles the color scheme of Chill, the blue virus from the Dr. Mario series.
Green	Resembles his appearance in Dr. Mario for the original Game Boy.
Black	Referred to as the "Unlicensed Doctor" on the Melee website. Also invokes the coats worn by earlier doctors before the shift to white coats.
Yellow	Resembles the color scheme of Weird, the yellow virus from the Dr. Mario series.
Purple
Pink	Resembles the color of the scrubs worn by Nurse Toadstool.

Duck Hunt

Default	The duck is one of the three possible ducks from Duck Hunt.
Black	The dog resembles a Bernese Mountain Dog. The duck resembles a male Saxony duck.
Blue	The dog has the bicolor coat pattern of a Border Collie. The duck resembles an American black duck.
Brown	The duck resembles a female Orpington Duck.
White	The dog resembles a Dalmatian. The duck resembles a ruddy shelduck, an orange species with green wings.
Tan	The dog resembles a Beagle. The duck resembles a male blue-headed mallard, an uncommon variant.
Yellow	The duck is one of the three possible ducks that appear in Duck Hunt. It resembles a male mallard. The dog's yellow coat additionally resembles its official artwork from the NES game.
Red	The dog resembles a black Labrador Retriever. The duck is one of the three possible ducks from Duck Hunt. Collectively, the costume bears a resemblance to Banjo and Kazooie; this is supported through their Classic Mode route, which features Duck Hunt in this alternate costume as the first opponent.

Falco

Grey	Based on his appearance in Star Fox Zero.
Orange	Resembles his appearance in Star Fox 64 and Star Fox 64 3D.
Blue
Red	Resembles his appearance in Star Fox: Assault.
Green
Black	Complementary to Fox's "Dark Fox" costume. Resembles a red-throated caracara, black pheasant or raven.
White
Pink	Resembles Katt Monroe, Falco's love interest, as she appears in Star Fox 64 and Star Fox 64 3D.

Fox

Default	Based on his appearance in Star Fox Zero.
Black	Referred to as the "Dark Fox" on the Brawl DOJO!! He resembles a cross fox.
Red	Resembles his red "Player 1" costume from Star Fox: Assault's Versus Mode and Falco's appearance in Assault.
Green	Resembles his green "Player 4" costume from Assault's Versus Mode and concept art of him for the original Star Fox.
Orange	Resembles Falco's appearance in Star Fox 64 and Star Fox 64 3D.
White
Yellow	Resembles his yellow "Player 3" costume from Assault's Versus Mode.
Purple	Resembles Wolf, but his fur is made more purple to distinguish him from Wolf himself. Also resembles a silver fox.

Ganondorf

Red	Based on his appearance in The Legend of Zelda: Ocarina of Time.
Violet
Blue	Resembles his original appearance as the monster Ganon in The Legend of Zelda, A Link to the Past, the Oracle titles, Four Swords Adventures, and A Link Between Worlds. His red armor gives him greater resemblance to Ganon's sprite from the first game compared to the Smash 4 equivalent.
Green
Purple	The artwork for this alternate costume in-game displays the lining around Ganondorf's armor colored gold while it's actually colored white in-game.
Brown	Resembles his appearance in The Legend of Zelda: The Wind Waker.
White	Complementary to Link's "Dark Link" costume. The skin is a slate-blue hue compared to the previous game, and combined with the purple cape it evokes the image of Ganon's appearance in Four Swords Adventures.
Grey	Resembles his appearance in The Legend of Zelda: Twilight Princess, which was the basis of his Brawl and Smash 4 appearances.

Greninja

Blue
Red	Resembles Crawdaunt, another Water/Dark-type Pokémon.
Pink	Resembles Lickitung and Lickilicky, two other Pokémon with long tongues.
Black	Somewhat resembles Greninja's shiny coloration, with its webbing, mouth, and head fins being a darker yellow instead of dark grey and its toungue being orange instead of red.
Violet
Green	Resembles Politoed, another frog-based Pokémon.
Grey
Purple

Hero

Half of the Hero's alternate costumes represent different protagonists from across the franchise. The other half are recolors of the first four and are based on different characters from the Dragon Quest series.

Luminary	The Hero from Dragon Quest XI, the Luminary.
Erdrick	The male Hero from Dragon Quest III, Erdrick.
Solo	The male Hero from Dragon Quest IV, Solo.
Eight	The Hero from Dragon Quest VIII, Eight.
Luminary Red	Resembles Angelo from Dragon Quest VIII.
Erdrick White	Resembles the Hero from Dragon Quest V.
Solo Orange	Resembles the Hero from Dragon Quest. His Slime earring turns metal, in reference to the Metal Slimes.
Eight Blue	Resembles Terry from Dragon Quest VI.

Ice Climbers

The Ice Climbers switch positions and the player controls Nana when the red, brown, white and orange costumes are equipped. The stock icons and character selection portraits change to reflect this.

Purple
Blue
Green
Indigo
Red	Nana resembles her appearance on the American boxart for Ice Climber.
Brown
White	The colors of their mittens and boots match those of their default colors. The color of their parkas, mittens and boots loosely resemble those of the Polar Bears.
Orange

Ike

Ike uses his Ranger design from Fire Emblem: Path of Radiance for half of his costumes, and his aged up Hero design from Fire Emblem: Radiant Dawn for the other half. Each design was previously used for his appearance in Brawl and Smash 4, respectively. The two different designs use different voicelines to reflect the age difference.

Default	Based on his appearance as a Ranger in Fire Emblem: Path of Radiance.
Brown	Based on his appearance as a Hero in Fire Emblem: Radiant Dawn.
Purple
Red	Resembles the color scheme of an armored enemy unit in Fire Emblem: Radiant Dawn.
Yellow	Resembles Greil, Ike's father. The costume and green headband is also reminiscent of Ike's appearance in the Lord class.
Green	Resembles Geoffrey, one of Ike's comrades, as he appears in Path of Radiance.
Blue	Resembles Sigurd, one of the protagonists in Fire Emblem: Genealogy of the Holy War.
Black	Resembles the Black Knight, Ike's rival, as he appears in Path of Radiance.

Incineroar

Red
Green
Black	Partial reversal of its normal colors. It resembles its pre-evolution, Litten, but with a grey torso instead of a black one.
Blue
Orange	Resembles fellow fully-evolved Fire-type starter Infernape.
Purple
Grey
White	Resembles its shiny coloration, with a darker-colored chest and white markings.

Inkling

Inkling alternates between the female and male versions from the original Splatoon. Aside from the first, fifth and seventh costumes, the Inkling colors match the respective port color.

Orange	Female Inkling wearing Fake Contacts, a White Tee, and Pink Trainers, as she appears in artwork for Splatoon, albeit without the Studio Headphones.
Blue	Male Inkling wearing Fake Contacts, a Zink Layered LS, and Purple Hi-Horses, as he appears in artwork for Splatoon, albeit without the Pilot Goggles.
Yellow	Female Inkling wearing the Hero Headset Replica, Hero Jacket Replica, and Hero Runner Replicas, as she appears in artwork for Splatoon, but with yellow tentacles and ink instead of green. She resembles Agent 3, and is directly referred to as such in a Japanese Nintendo Direct.
Green	Male Inkling wearing the Skull Bandana, Armor Jacket Replica, and Moto Boots, as he appears on the Vol. 2 boxart for Sheldon's Picks.
Pink	Female Inkling wearing the Takoroka Mesh, Black Squideye, and White Kicks, as she appears in artwork for Splatoon.
Cyan	Male Inkling wearing the Black Arrowbands, Baby-Jelly Shirt, and Blue Slip-Ons, as he appears in artwork for Splatoon, but with cyan tentacles and ink instead of purple.
Purple	Female Inkling wearing the Squid Hairclip, School Uniform, and School Shoes, as she appears in promotional artwork from the Squid Research Lab.
Indigo	Male Inkling wearing the Skate Helmet, Octo Tee, and Octoling Boots. The color he uses appears to be original, as it wasn't in either Splatoon game.

Isabelle

Half of Isabelle's costumes are based on her Summer Outfit, and the other half are based on her Winter Outfit.

Green	Wears her summer outfit from Animal Crossing: New Leaf.
Yellow	Wears her winter outfit from New Leaf.
Pink	Resembles her casual outfit from Animal Crossing: Happy Home Designer.
Red	Resembles the uniform of the Happy Home Academy, which is worn by Lyle, Lottie, and Digby, Isabelle's brother.
Purple
Teal	Resembles Tom Nook as he appears in New Leaf.
Grey	Resembles her Labor Day outfit in New Leaf.
Blue

Jigglypuff

Default
Red
White	Its hat is reminiscent of Leaf, the female protagonist of Pokémon FireRed and LeafGreen.
Blue	Resembles one of the possible colors for a nicknamed Jigglypuff in Pokémon Stadium. Its hat is reminiscent of the Bug Catcher Trainer class.
Green	Resembles one of the possible colors for a nicknamed Jigglypuff in Pokémon Stadium. Its cap is reminiscent of Kirby with the Sleep Copy Ability.
Pink	Resembles its Red Team costume from the original Super Smash Bros.
Nurse	Its hat is reminiscent of the Pokémon Center Nurse from Pokémon X and Y.
Glasses	Its cap and glasses respectively are reminiscent of Serena's Red Felt Hat and White Wide-Frame Glasses from X and Y.

Joker

Two of Joker's alternate costumes place him in his Shujin Academy uniform from Persona 5. When wearing his school uniform, Joker takes off his glasses when summoning Arsène instead of his mask.

Black	Joker's Phantom Thieves disguise.
Purple	Resembles the thematic color of Revelations: Persona.
Blue	Based on the thematic color of Persona 3. Also resembles the color scheme shared by the Velvet Room attendants.
Yellow	Based on the thematic color of Persona 4.
Red	Based on the thematic color of Persona 5. A partial reversal of his regular color scheme. It also resembles Arsène, the thematic color of Persona 2, and Tatsuya Suou's outfit from Persona 2: Eternal Punishment.
White	Resembles Goro Akechi, a temporary member of the Phantom Thieves of Hearts, in his Crow outfit.
School	Joker's Shujin Academy school uniform.
School White	Resembles his summer uniform, as well as Yusuke Kitagawa's Kosei High School uniform. The buttons resemble those on the coat of Goro Akechi.

Kazuya

Half of Kazuya's costumes are based on his signature style of a flame embroidered Gi bottom with no top, and the other half are based off his alternate trenchcoat suit outfit from Tekken 7.

Default	His default appearance in both Tekken 5 and Tekken 6.
Suit	His default appearance in Tekken 7.
Red	Based on his Player 1 outfit in Tekken 5: Dark Resurrection
White	Resembles his Player 2 outfit in Tekken 5: Dark Resurrection
Blue	Resembles his Player 2 outfit from Tekken and Tekken 2.
Purple	Based on his tuxedo costume from Tekken 2. Could also reference two similar alternate costumes that Kazuya has in Tekken Tag Tournament and Tekken 5, both of which are also purple tuxedos.
Black	Based on Jin Kazama, Kazuya's son.
Yellow	Features gold decorations first seen in Tekken. Also based on the metallic gold custom costume from Tekken 7.

Ken

Most of Ken's costumes seem to largely derive from his alternate costumes from Super Street Fighter II Turbo. The attributed references below come from that game unless otherwise specified.

Red	Based on his appearance in Street Fighter II with elements lifted from Street Fighter IV.
Grey	Resembles his alternate color in Street Fighter II': Champion Edition when playing in a Mirror Match. Also resembles his "Medium Punch" color ("Strong" in reference source).
Blue	Resembles his default color in Street Fighter II' Turbo: Hyper Fighting. Also resembles his "Heavy Punch" color ("Fierce" in reference source).
White	Resembles his "Light Punch" color ("Jab" in reference source).
Green	Resembles his "Light Kick" color ("Short" in reference source).
Yellow	Resembles his "Start button" color. It is also reminiscent of the gi worn by his disciple, Sean Matsuda.
Cyan	Resembles his "Medium Kick" color ("Forward" in reference source).
Black	Resembles his EX (LK+HP) color in Street Fighter III: 2nd Impact. Also resembles Violent Ken's alternate costume in SNK vs. Capcom: SVC Chaos and his fifth costume in Ultra Street Fighter II: The Final Challengers.

King Dedede

Red
Pink	Resembles his Player 2 color in Kirby 64: The Crystal Shards' Multiplayer mode.
Green	Resembles one of his alternate costumes in Kirby Air Ride. The obi features embroidered Waddle Dees, using their sprites from Kirby Super Star Ultra.
Purple	Resembles one of his alternate costumes in Kirby Air Ride. The obi is reminiscent of formal Japanese kimonos.
Cyan
Grey	Resembles his appearance on the monochromatic Game Boy screen in Kirby's Dream Land.
Blue	Resembles his Player 4 color in Kirby 64's Multiplayer mode. The obi includes a traditional Japanese seigaiha pattern.
Black	Resembles one of his alternate costumes in Kirby Air Ride, with his skin resembling real-life great penguins. The artwork shows King Dedede's beak colored orange, while it is actually colored yellow in-game.

King K. Rool

Green	A composite of his classic appearance from the Rare-developed Donkey Kong titles and his modern design introduced in the Paon-developed titles.
Orange	Resembles Re-Koil from Donkey Kong Country 3: Dixie Kong's Double Trouble! and Kerozene from the Game Boy Advance version of Donkey Kong Country 2: Diddy's Kong Quest.
Blue	Resembles Krusha from Donkey Kong Country and Donkey Kong 64.
Yellow	Resembles Kutlass from Donkey Kong Country 2 and Kopter as he appears in Donkey Kong Barrel Blast.
Pink	Resembles Skidda in Donkey Kong Country 3; Klump as he appears in Donkey Kong 64; and Kritters from the Game Boy Advance version of Donkey Kong Country.
Black	Resembles Black Kritters from Donkey Kong Country.
Brown	Resembles Klump as he appears in Donkey Kong Barrel Blast. Also partially resembles an inversion of his normal colors.
White	Resembles the primary color motifs of the Snowmads, the primary antagonists of Donkey Kong Country: Tropical Freeze, and their leader, Lord Fredrik.

Kirby

Kirby's palette swaps are based on his alternate colors that regularly appear in his own series.

Pink
Yellow	Based on and directly referred to as "Keeby" from Kirby's Dream Course. It also resembles Yellow Kirby from various Kirby titles and Beam Kirby in Kirby Super Star.
Blue	Based on Ice Kirby in Kirby Super Star, as well as Blue Kirby from various Kirby titles.
Red	Based on Fire Kirby in Kirby Super Star, as well as Red Kirby from various Kirby titles.
Green	Resembles Green Kirby from the Game Boy Advance and Nintendo DS Kirby titles, starting with Kirby: Nightmare in Dream Land. Officially referred to as "kusa mochi Kirby" in Japanese.
White	Based on his monochromatic in-game sprite from Kirby's Dream Land.
Orange
Purple	Resembles an unmasked Meta Knight, with glowing yellow eyes and no blush marks. This design was originally unique to Super Smash Bros. 4, as previous Kirby games depicted him with white eyes and blush marks, but it has been integrated into the main Kirby series starting with Kirby: Planet Robobot.

Link

Link's clothing design is based on his Champion's Tunic for half of his costumes, and based on the Hero of the Wild set for the other half. Both are from The Legend of Zelda: Breath of the Wild.

Blue	Based on his appearance wearing the Champion's Tunic in Breath of the Wild.
Green	Wears the Hero of the Wild set from Breath of the Wild.
Red	Resembles the Hylian Tunic from Breath of the Wild.
Grey	Resembles Fierce Deity Link from The Legend of Zelda: Majora's Mask.
Indigo	Resembles the Royal Guard Uniform from Breath of the Wild. The colors of the Hylian Shield resembles the Royal Guard's Shield.
Teal	Resembles the Hero of Twilight Set from Breath of the Wild, based on The Legend of Zelda: Twilight Princess, which was the basis of his Brawl and Smash 4 appearances.
White	Resembles his appearance as a resident of Skyloft from the beginning of The Legend of Zelda: Skyward Sword. While it bears less resemblance than the equivalent costume from Smash 4, it now lacks a hat, matching Skyward Sword.
Black	Based on Dark Link. Resembles the Interlopers from The Legend of Zelda: Twilight Princess and the Dark armor set from Breath of the Wild.

Little Mac

Little Mac is the only character to have their number of costumes decrease from SSB4, going from 16 in SSB4 to 8 in Ultimate.

Default	Based on his appearance in Punch-Out!! (Wii).
Yellow	Resembles his appearance in Punch-Out!! (Wii)'s Title Defense Mode.
White	Resembles his in-game sprite after defeating opposing boxers in Punch-Out!! (1987).
Blue	Resembles his appearance when fighting in the World Circuit in Punch-Out!! (Wii).
Black	Resembles the protagonist of Super Punch-Out!!
Pink	Wears his pink, hooded sweatshirt from the training montages in the Punch-Out!! series.
Wire	The wireframe design based on the original arcade Punch-Out!! His colors appear cel-shaded in this costume; while his portrait depicts his hair as black, it appears dark green in-game.
Green	Based on his pink, hooded sweatshirt from the training montages in the Punch-Out!! series, but with the colors of the suit and gloves inverted. His colors appear cel-shaded in this costume.

Lucario

Blue
Purple
White	A brighter, more pale shade of its default costume.
Grey
Teal
Navy	A darker, saturated, more vibrant shade of its default costume.
Green
Pink

Lucas

Yellow
Orange	Resembles Claus, Lucas's twin brother from Mother 3.
Blue
Red
Grey	Resembles the Masked Man from Mother 3. The shirt's design includes a sprite of the Masked Man's head. The pale skin could be a reference to Porky as he appears in Mother 3.
Cyan	Resembles Duster from Mother 3.
Green	Resembles Boney's human disguise from Mother 3. The shirt's design features a sprite of Boney's head.
Purple	The shirt's design includes a sprite of a baby Drago from Mother 3.

Lucina

Lucina's alternate costumes are based on female characters from Fire Emblem Awakening.

Blue
Green	Resembles Nowi.
Black	Resembles Cherche.
White	Resembles Cordelia, and also bears similarity to Severa.
Red	Resembles Tiki. The back of her cape features a crest of the Divine Dragon Naga, Tiki's mother.
Yellow	Resembles Lissa, Lucina's aunt.
Navy	Resembles Tharja. The back of her cape features the Brand of the Fell Dragon, a prominent symbol in Tharja's home country.
Purple	Resembles Sumia.

Luigi

Green	Based on his appearance in Super Mario Odyssey without a bowtie.
Orange	Resembles Mario's appearance on the boxart for Pinball, although Luigi's cap is orange instead of blue.
Pink	The original Super Smash Bros. website referred to this costume as "Strawberry Luigi". It resembles his appearance from Wrecking Crew.
Cyan	Resembles Mario's appearance on the American boxart for Mario Bros.
White	Resembles Fire Luigi.
Purple	Resembles Waluigi, though the "L" on his cap is purple instead of yellow.
Blue	Resembles Mario's appearance on the Game & Watch boxart for Donkey Kong Jr.
Yellow	The artwork for this alternate costume shows the "L" on his cap as yellow instead of its actual light blue color in-game. Resembles the appearance of a boy on the boxart for the New Wide Screen rerelease of the Game & Watch game Manhole, but with grayish brown shoes instead of red ones. Also resembles his appearance in the Atari XE port of Mario Bros., although Luigi's cap is yellow rather than green.

Mario

Red	Based on his appearance in Super Mario Odyssey.
Striped	Based on his appearances from Family Computer Golf: U.S. Course and NES Open Tournament Golf.
Blue	Reminiscent of his appearance on the Japanese and European covers of the NES version of Mario Bros.
Black	Originally based on Foreman Spike from Wrecking Crew, though the palette has become more monochromatic since its debut in the original Super Smash Bros.
Green	Reminiscent of the colors of his outfit on the Japanese boxart for Wrecking Crew, but with the overalls being more brown. It also resembles Luigi's appearance from promotional artwork for the arcade version of Mario Bros., with the colors of the overalls and shirt swapped. Finally, it bears a passing resemblance to Jinbe from Mole Mania, another game produced by Shigeru Miyamoto.
Purple	Resembles Waluigi. It also resembles Mario's appearance with the L and W Emblems equipped in Paper Mario: The Thousand-Year Door, as well as Mario's "Waluigi" outfit in Super Mario Odyssey.
Yellow	Builder Mario from Super Mario Maker. Replaces his Wario-colored costume from the previous games.
White	Wedding Mario from Super Mario Odyssey. Replaces his Fire Mario costume from the previous games.

Marth

Navy	Based on his appearance as a Lord in Fire Emblem: Shadow Dragon and New Mystery of the Emblem: Heroes of Light and Shadow. Falchion retains its design from Mystery of the Emblem.
Red	Resembles the overworld sprites of enemy units in the Fire Emblem games. Also resembles Minerva's design in the Fire Emblem: The Complete art book.
Green	Resembles the overworld sprites of allied units in the Fire Emblem games.
Black	Resembles Camus, one of Marth's allies, as he appears starting with Fire Emblem: Mystery of the Emblem.
White	Based on Leif, the protagonist of Fire Emblem: Thracia 776, though the palette has become more monochromatic since Smash 4.
Blue	Resembles his appearance in Mystery of the Emblem.
Yellow
Purple	Resembles his appearance in Shadow Dragon and the Blade of Light. Replaces his Roy-colored costume from the previous game.

Mega Man

Blue	Based on his appearance first seen in the original Mega Man.
Red	Resembles his appearance when using various utility items throughout the Mega Man series, most notably Rush. It is also used for Optic Laser in Street Fighter X Mega Man.
Green	Resembles his appearance when using Hyper Bomb in the original Mega Man, Leaf Shield in Mega Man 2, Search Snake in Mega Man 3, Rain Flush in Mega Man 4, Gyro Attack in Mega Man 5, Centaur Flash in Mega Man 6, Centaur Arrow in Mega Man 2: The Power Fighters, Copy Vision in Mega Man & Bass, and Tornado Blow in Mega Man 9.
Brown	Resembles his appearance when using Metal Blade in Mega Man 2, Ring Boomerang in Mega Man 4, and Silver Tomahawk in Mega Man 6.
Cyan	Resembles his appearance when using Gemini Laser in Mega Man 3, Skull Barrier in Mega Man 4, Crystal Eye in Mega Man 5, Blizzard Attack in Mega Man 6, Jewel Satellite in Mega Man 9, and Block Dropper in Mega Man 11.
Chartreuse	Resembles his appearance when using Slash Claw in Mega Man 7, Astro Crush in Mega Man 8, and Electric Shock in Mega Man V on Game Boy.
Orange	Resembles his appearance when using Fire Storm in the original Mega Man, Atomic Fire in Mega Man 2, Flame Blast in Mega Man 6, Flame Sword in Mega Man 8, Wave Burner in Mega Man & Bass, Magma Bazooka in Mega Man 9, Solar Blaze in Mega Man 10, and Yoga Inferno in Street Fighter X Mega Man,
Grey	Resembles his appearance when using Thunder Beam in the original Mega Man, Top Spin in Mega Man 3, Thunder Wool in Mega Man 10, and Aegis Reflector in Street Fighter X Mega Man.

Meta Knight

Blue	Resembles his design that debuted in Kirby: Right Back at Ya! and in artwork from Kirby: Nightmare in Dream Land, but more detailed.
White	Resembles one of his alternate costumes in Kirby Air Ride.
Red	Resembles one of his alternate costumes in Kirby Air Ride.
Green	Resembles one of his alternate costumes in Kirby Air Ride.
Navy	Resembles his original appearance in Kirby's Adventure, but with red eyes.
Pink	Resembles one of his alternate costumes in Kirby Air Ride, as well as Kirby.
Purple	Based on Galacta Knight. Extra details include a pink Galaxia, and the mask's vertical slit and yellow markings. While the mask's vertical slit is merely a texture, the model is still modified by removing the vertical ridge that is otherwise present in all of his other costumes.
Grey	Based on Dark Meta Knight. Extra details include a silver Galaxia with a blue gem, and a scar on the left side of his mask.

Mewtwo

Default
Orange	Resembles one of the possible colors for Mewtwo in the Pokémon Stadium titles.
Blue	Resembles one of the possible colors for Mewtwo in the Pokémon Stadium titles.
Brown
Pink	Resembles its original artwork from Pokémon Red and Green, which was presented as pink rather than purple later on.
Yellow	Resembles its original Shiny coloration from Pokémon Gold, Silver, and Crystal.
Cyan
Purple	Resembles Shadow Lugia from Pokémon XD: Gale of Darkness.

Mii Fighter

The Mii Fighters' various costume options are distinct from how other characters' alternate costumes work. Unlike in SSB4, the colors of Mii Fighters' outfits are now customizable.

Min Min

Min Min's first four costumes are based on the color schemes that could be selected either randomly or by clicking, holding, then tilting the left control stick in ARMS.

Orange	Her costume from ARMS when the control stick is tilted up.
Cyan	Her costume from ARMS when the control stick is tilted right.
Red	Her costume from ARMS when the control stick is tilted down.
Yellow	Her costume from ARMS when the control stick is tilted left.
Blue	Resembles Ninjara's default costume and Spring Man's costume when the control stick is tilted down.
Green	Resembles the Dragon ARM and Twintelle's costume when the control stick is tilted left.
Pink	Resembles Ribbon Girl's costume when the control stick is tilted down.
Black	Resembles the Phoenix ARM and Byte & Barq's costume when the control stick is tilted left.

Mr. Game & Watch

Black	Reminiscent of the lit LCD cells and frames from the Game & Watch units.
Red	Reminiscent of characters and objects as depicted on the Virtual Boy.
Yellow	Reminiscent of characters and objects as depicted on the original Game Boy.
Blue
Teal	Reminiscent of the two shades commonly used by the Game Boy for the background and foreground.
Cyan	Reminiscent of the backlit display of the Game Boy Light.
Green	Reminiscent on the green dot-matrix display of the Game Boy.
White	Reminiscent of the monochromatic LCD screen of the Game & Watch titles.

Ness

Red
White	Resembles Fuel from Mother 3, but with a cap.
Yellow	Based on the uniforms of the Hanshin Tigers, a Japanese baseball team. The shirt's pattern is reminiscent of the Gigantic Ant enemy from EarthBound.
Green	His clothes resemble the color scheme of Everdred's outfit in EarthBound.
Blue	Resembles his younger self that he encounters in Magicant, as well as the color scheme of the Happy Happyism cult in EarthBound.
Black	The shirt features a sprite of Mr. Saturn on the front.
Cyan	The shirt's pattern is reminiscent of Master Belch from EarthBound. Notably darker than how it appeared in SSB4.
Purple	The shirt's pattern is reminiscent of the tile pattern on the file select and character naming screens in EarthBound.

Olimar

Four of Olimar's costumes replace him with Alph, one of the protagonists of Pikmin 3.

Tan	Based on his appearance in Pikmin 3.
Red
Green
Blue	Combines elements of his white and blue costumes from Brawl, which resembled a Navy Mark IV space suit and his partner Louie from Pikmin 2, respectively.
Alph	Replaced with Alph.
Alph Green	Resembles Charlie, Alph's captain in Pikmin 3.
Alph Pink	Resembles Brittany, Alph's co-worker in Pikmin 3.
Alph Red	Resembles Olimar.

Pac-Man

Pac-Man's stock icons are the only ones that do not alter its colors directly to represent each palette swap; instead, a colored neon bar (appearing similar to the wall sections from the original Pac-Man) is used under the stock icon. Most of his alternate costumes change his model to give him colored armbands and/or the Wing Shoes power-up from Pac-Land.

Default	Based on his bipedal design first seen on the side of Japanese arcade cabinets of the original Pac-Man. Takes particular inspiration from his appearance in Pac-Man World.
Blue	Resembles his in-game sprite with the Wing Shoes power-up from Pac-Land.
Yellow
Black
Purple
White	Resembles his artwork with the Wing Shoes power-up from Pac-Land.
Red	The armbands are noticeably thinner, which makes them resemble compression sleeves, and he wears red leggings instead of Wing Shoes.
Plaid	His gloves and boots are reminiscent of oven mitts.

Palutena

White	Based on her appearance in Kid Icarus: Uprising.
Pink	Resembles her in-game sprite from the original Kid Icarus.
Cyan	Resembles Amazon Pandora from Kid Icarus: Uprising.
Green	Resembles her appearance in Kid Icarus' instruction booklet.
Blue
Red	Resembles Viridi.
Black	Resembles Dark Pit.
Purple	Resembles Medusa as she appears in Uprising.

Peach

Pink	Based on her apperance in Super Mario Odyssey.
Yellow	Replaces her Daisy-based costume from the previous games, due to Daisy being an Echo Fighter of Peach.
Red	Resembles Pauline's original appearance in Donkey Kong.
Blue	Resembles one of her alternate colors from Mario Golf and Daisy's appearance on the title screen of NES Open Tournament Golf.
Green	Resembles one of her alternate colors from Mario Golf and her appearance on the title screen of NES Open Tournament Golf.
White	Based on a wedding gown.
Fire	Resembles her in-game sprite from the original Super Mario Bros. and Fire Peach from Super Mario 3D World.
Black

Pichu

Yellow
Cyan	Its goggles are reminiscent of the Swimmer Trainer class.
Red	Resembles its Red Team costume from Super Smash Bros. Melee, but without the neckerchief.
Grey	Its beanie has the same design as those of Team Skull Grunts from Pokémon Sun and Moon.
Blue	Its bandanna has the same design as those of Team Aqua Grunts from Pokémon Ruby and Sapphire.
Spiky	Spiky-eared Pichu, a special Pichu that appeared in Pokémon HeartGold and SoulSilver.
White	Its flower resembles the white Flower Barrette, a hair accessory available in Pokémon Sun and Moon.
Band	Its headband resembles the Focus Band.

Pikachu

Default
Red	Resembles one of the possible colors for a nicknamed Pikachu in Pokémon Stadium and its Shiny coloration. Its cap is reminiscent of Red's appearance in Pokémon Red and Blue.
Green	Resembles one of the possible colors for a nicknamed Pikachu in Pokémon Stadium. Its headband is reminiscent of Brendan's appearance in Pokémon Emerald.
Yellow	Its cap is reminiscent of Ethan's appearance in Pokémon HeartGold and SoulSilver.
Blue	Resembles its Blue Team costume from the original Super Smash Bros.
Glasses	Resembles its appearance in Pokémon X and Y and its official artwork for the Pokémon series. Its cap and glasses respectively are reminiscent of Calem's Red Outdoors Cap and Wide-Frame Glasses from X and Y.
Female	Female Pikachu. Its hat is reminiscent of Selene's Casual Cap from Pokémon Sun and Moon.
Libre	Female Pikachu. It wears the Libre costume from Pokémon Omega Ruby and Alpha Sapphire.

Piranha Plant

For each costume, the container Piranha Plant sits in alternates between a pot and a pipe.

Red	It sits in the brown pot from Super Mario 3D World.
Green	Resembles its original design from Super Mario Bros. Its pipe resembles the common pipe from the New Super Mario Bros. series.
Yellow	Resembles the Wild Ptooie Piranha from Super Mario World 2: Yoshi's Island after being struck once; a yellow Piranha Plant from the "Piranha Panic" minigame in Mario Superstar Baseball; and the Glad Piranha Plant from Super Princess Peach.
Pink	Resembles the Piranha Creeper from Super Mario 3D World. Its pipe color is similar to that of the pipe sprite in underground levels from Super Mario Bros.
Black	Resembles the Inky Piranha Plant from Super Mario 3D Land.
White	Resembles the Bone Piranha Plant from New Super Mario Bros. 2.
Purple	Resembles a purple Piranha Plant from the "Piranha Panic" minigame in Mario Superstar Baseball; the Big Bungee Piranha from Yoshi's Island DS; and the Spiny Piranha Plant from Super Mario Galaxy.
Blue	Resembles its underground sprite from Super Mario Bros. Its stalk and leaves are the same color as the green costume, furthering the connection. It also resembles Blue Piranha Plants from the battle modes of Mario Kart 8 Deluxe, but its stalk and leaves are a different color.

Pit

Default	Based on his appearance in Kid Icarus: Uprising.
Yellow
Red	Resembles his chiton after obtaining the Gold Arrow and reaching Level 4 strength in the original Kid Icarus.
Green	Resembles his chiton after obtaining the Bronze Arrow and reaching Level 2 strength in Kid Icarus. The wings are now red.
Blue	Resembles his chiton after obtaining the Sacred Arrow and reaching Level 5 strength in Kid Icarus. Also resembles his appearance in the Kid Icarus manual.
Black	Referred to as a "fallen angel" on the Brawl DOJO!! Unlike in Brawl, Pit retains his brown hair and his laurel wreath becomes purple, likely to better differentiate him from Dark Pit.
White	Resembles a putto.
Pink	Combines elements of his cyan and pink costumes from Smash 4.

Pokémon Trainer

Only the starting Pokémon is shown on the character selection screen; it can be changed by hovering the cursor over it and selecting it. All of Pokémon Trainer's alternate costumes reference a protagonist from each generation of the Pokémon games. The colors below correspond to Squirtle's shell, Ivysaur's bud and Charizard's skin.

Default	The male trainer is based on his appearance in Pokémon FireRed and LeafGreen.
Red	The female trainer is based on her appearance in Pokémon FireRed and LeafGreen. Collectively, all three Pokémon more clearly evoke the colors blue, green and red, which are the theme colors of the original Kanto-based Pokémon games. Squirtle resembles the Pokémon Wartortle, its evolved form. Ivysaur resembles its in-battle sprite from Gold, Silver, and Crystal, as well as its menu sprite from Generations III through V. Charizard resembles the Pokémon Charmeleon, its pre-evolved form.
Green	The male trainer resembles Ethan as he appears in Pokémon Gold, Silver and Crystal. Squirtle resembles its shiny coloration with darker colors. Ivysaur resembles its monochrome sprite from the Gen I games. It also resembles the Pokémon Bulbasaur, its pre-evolved form.
Pink	The female trainer resembles May as she appears in Pokémon Emerald.
Yellow	The male trainer resembles Lucas as he appears in Pokémon Diamond and Pearl. His bracelets turn blue, making them resemble the male design for the Pokétch. Squirtle resembles its in-battle sprite from Gold, Silver, and Crystal. Ivysaur resembles its shiny coloration with bluer skin. Charizard resembles the shiny colorations of Charmander and Charmeleon, though with darker coloring.
White	The female trainer resembles Hilda as she appears in Pokémon Black and White. Her bracelets gain a red stripe, making them resemble the female design for the Xtransceiver. The white color scheme of her Pokémon coincides with Pokémon White. Ivysaur resembles its in-battle sprite from the Japanese releases of Pokémon Red & Green. Charizard resembles the Pokémon Aerodactyl. Its white color scheme, and its allocation to the Trainer's Hilda-based costume, may be a reference to Reshiram.
Blue	The male trainer resembles Calem as he appears in Pokémon X and Y. He has tanned skin, much like one of the customizable options in X and Y. The blue color scheme of his Pokémon coincides with Pokémon X. Charizard resembles the Pokémon Zubat and its evolved form, Golbat.
Purple	The female trainer resembles Selene as she appears in Pokémon Ultra Sun and Ultra Moon. She has tanned skin, much like one of the customizable options in Sun, Moon, Ultra Sun and Ultra Moon. The purple color scheme of her Pokémon coincides with Pokémon Moon and Ultra Moon. Charizard resembles its original Shiny coloration from Pokémon Gold, Silver, and Crystal, with the skin being more saturated and the wings being black instead of green.

Pyra/Mythra

Masahiro Sakurai overviewed the palettes for both Pyra and Mythra in the Mr. Sakurai Presents "Pyra/Mythra" video, giving his comments on each.

Default	Both have minor alterations made to their original designs to suit the game's lower age rating than Xenoblade Chronicles 2. Mythra's design is based on her unlockable "Massive Melee Mythra" costume that can be obtained after completing Chapter 3, which was initially designed for her spirit in SSBU.
Green	Both color schemes are based on Pneuma, their combined Ascended State as well as their true form in Xenoblade Chronicles 2.
Swapped	Their color schemes are reversed, referencing an unlockable costume option both have in Xenoblade Chronicles 2 through the Challenge Mode. Sakurai explains that this can be used for mindgames on one's opponent.
Gormotti	Pyra's color scheme is based on the cat-eared Gormotti hood she wore as a disguise prior to meeting Tora, while Mythra's color scheme is based on Nia.
Black	Sakurai describes these palettes as giving them a "villainous look". They resemble Poppi QTπ, the third form of fellow party member, Poppi, as well as the color scheme of Weltall from Xenogears.
Blue	Sakurai describes these palettes as bearing a "tricolor aeronautical motif", possibly referencing Rex's occupation as a Salvager. Resembles the color scheme of Xenogears, the most powerful Gear in Xenogears.
Saturated	Both color schemes are based upon their default designs, but with more vibrant colors.
Metal	Pyra's color scheme is gold, while Mythra's color scheme is silver or platinum.

Richter

Navy	Based on his appearance from Castlevania: Rondo of Blood.
Red	Resembles Juste Belmont as he appears in Castlevania: Harmony of Dissonance and Christopher Belmont as he appears in Castlevania: The Adventure ReBirth.
Purple	Resembles the Dark Priest Shaft as he appears in-game in both Castlevania: Rondo of Blood and Castlevania: Symphony of the Night.
Green	Resembles the "Curse" status-effect from Castlevania: Rondo of Blood and Castlevania: Dracula X. Also resembles the color scheme of Nathan Graves from Castlevania: Circle of the Moon.
Yellow	Resembles artwork for John Morris for Castlevania: Bloodlines. Also resembles Julius Belmont as he appears in Castlevania: Dawn of Sorrow.
Blue	Resembles his design in Castlevania: Symphony of the Night and his design in Castlevania: The Dracula X Chronicles.
Black	Resembles Alucard as he appears in Castlevania: Symphony of the Night.
White	Resembles Leon Belmont as he appears in Castlevania: Lament of Innocence.

Ridley

Default	Ridley is primarily based on his Super Metroid appearance, with some embellishments and elements that his clone had in Metroid: Other M.
Meta	Meta Ridley, resembling his original design from Metroid Prime and Brawl's Subspace Emissary.
Red	Resembles artwork of him for Super Metroid and his appearance on the American boxart.
Blue	Resembles Neo-Ridley from Metroid Fusion.
Green	Resembles artwork of him for Metroid: Zero Mission.
Purple	Resembles his in-game sprite from Metroid.
Yellow	Resembles the Golden Statue of Ridley from Super Metroid.
Grey	Resembles Mecha Ridley from Zero Mission.

R.O.B.

R.O.B.'s default costume switches between the first and second ones listed depending on the game's language.

Tan	Based on the Japanese version of R.O.B. released for the Famicom. The text on his base reads "Family Computer Robot". It is the default color for Asian languages.
Grey	Based on the western version of R.O.B. released for the NES. The text on his base reads "R.O.B. - Robotic Operating Buddy". It is the default color for Western languages.
Yellow	Resembles Spike, a glitch enemy from Stack-Up.
Purple	Resembles Flipper, a glitch enemy from Stack-Up. It also resembles the North American color scheme for the Super Nintendo Entertainment System.
Blue	Resembles the Indigo Nintendo GameCube, as well as the Cobalt Blue Game Boy Advance SP.
Green	Resembles the R.O.B. Launcher enemy from Brawl's Subspace Emissary.
Cyan	Resembles the Pearl Blue Game Boy Advance SP. Also resembles an inverse of his blue costume.
Red	Resembles the Virtual Boy.

Robin

Half of Robin's costumes are male, while the other half are female.

Male	Based on the default customization settings for the male tactician in Fire Emblem Awakening.
Female	Based on the default customization settings for the female tactician in Awakening.
Green	Resembles the overworld sprite for Mark, the customizable tactician from Fire Emblem: The Blazing Blade. Robin's hair color more closely resembles Mark's than the equivalent costume in Smash 4.
Red	Resembles Anna, a reoccurring shopkeeper in the Fire Emblem series, as she appeared in Awakening. Robin's hair color less closely resembles Anna's than the equivalent costume in Smash 4.
Blue	Resembles Inigo from Fire Emblem Awakening. Robin's hair color more closely resembles Inigo's than the equivalent costume in Smash 4.
Yellow	Resembles Eyvel from Fire Emblem: Thracia 776. Robin's hair color less closely resembles Eyvel's than the equivalent costume in Smash 4.
White	Resembles the White Mage class from Square Enix's Final Fantasy series. Robin's hair color has been changed to dark brown, as opposed to the pitch black from Smash 4.
Pink	Resembles Serra from The Blazing Blade.

Rosalina & Luma

With the exception of the yellow and purple costumes, Rosalina's costumes are complementary to Peach's and transitively may share some sources of inspiration. Additionally, while not traditional alternate costumes, there are six different-colored Lumas outlined here.

Cyan
Pink
Yellow
Green
Red	Resembles Fire Rosalina in Super Mario 3D World.
Purple
Black
White	Resembles Peach's in-game sprite from the original Super Mario Bros. and Fire Peach from Super Mario 3D World.

Roy

Blue	Based on his appearance in Fire Emblem: The Binding Blade and his appearance in Fire Emblem Awakening as an Einherjar.
Red	Resembles his color scheme in The Binding Blade's Link Arena mode if he is on the player 3 team. Also resembles Alen, the red cavalier.
Green	Resembles his color scheme in The Binding Blade's Link Arena mode if he is on the player 2 team. Also resembles Lance, the green cavalier.
Violet	Resembles Marcus, Roy's guardian and ally in The Binding Blade.
Cyan	Resembles Eliwood, Roy's father, as he appears in Fire Emblem: The Blazing Blade.
Purple	Resembles Zephiel, the main antagonist of The Binding Blade.
Pink	Resembles his color scheme in The Binding Blade's Link Arena mode if he is on the player 4 team and Cecilia, Roy's tutor in The Binding Blade.
Yellow	Resembles Bors, an armor knight from Fire Emblem: The Binding Blade.

Ryu

Most of Ryu's costumes appear to derive from his alternate colors in Super Street Fighter II Turbo.

White	Contains elements from his appearances in Street Fighter IV and Street Fighter V.
Grey	Resembles his alternate color in Street Fighter II': Champion Edition when playing in a Mirror Match. It also resembles his "Medium Punch" color ("Strong" in reference source).
Cyan	Resembles his default color in Street Fighter II' Turbo: Hyper Fighting. Also resembles his "Heavy Punch" color ("Fierce" in reference source) and his appearances in Street Fighter and the Street Fighter Alpha titles.
Black	Resembles his "Light Punch" color ("Jab" in reference source).
Orange	Resembles his "Light Kick" color ("Short" in reference source). Also resembles Ryo Sakazaki, a fighter from SNK's Art of Fighting series.
Blue	Resembles his "Medium Kick" color ("Forward" in reference source).
Green	Resembles his "Heavy Kick" color ("Roundhouse" in reference source).
Purple	Resembles his tenth color in Street Fighter V. This replaces his red alternate costume from the last game.

Samus

Orange	Based on the Varia Suit as it appears in Metroid: Other M.
Blue	Based on the Fusion Suit from Metroid Fusion.
Pink	Based on the Gravity Suit's in-game sprite from Super Metroid, but more closely resembles the color scheme of the Varia Suit of the original Metroid when missiles are selected.
Brown	Based on the Dark Suit from Metroid Prime 2: Echoes.
Purple	Based on the Gravity Suit as it appears in Metroid Prime.
Green	Referred to as "Green Samus" by Masahiro Sakurai. The original Super Smash Bros. website referred to this alternate costume as "mass-produced Samus", a reference to the MS-06 Zaku II from the Gundam franchise.
White	Based on the Light Suit from Metroid Prime 2: Echoes.
Black	Resembles a Power Trooper, a Space Pirate copying Samus's Power Beam from Metroid Prime. Replaces her Dark Samus-based costume from Smash 4, due to Dark Samus being an Echo Fighter of Samus.

Sephiroth

Black	Based on his design from Final Fantasy VII: Advent Children and Crisis Core: Final Fantasy VII.
Purple	Resembles 1st Class SOLDIERs from Final Fantasy VII.
Green	Resembles the Midgar Zolom, a giant snake located outside the Mythril Mine in Final Fantasy VII. Also resembles Heidegger, Rufus Shinra's right-hand man.
Red	Resembles Genesis Rhapsodos, another subject of the Jenova Project. Also used in Dissidia Final Fantasy NT as the second alternate color for his default outfit "Operative of Legend".
White
Blue	Resembles 3rd Class SOLDIERs from Final Fantasy VII.
Coatless	Based on his appearance in Final Fantasy VII's final boss fight. Also appears in Dissidia Final Fantasy as his "Executioner" outfit.
Coatless Violet

Sheik

Blue	While her overall appearance derives from her The Legend of Zelda: Twilight Princess-based design from Brawl and SSB4, she wears the Stealth set from The Legend of Zelda: Breath of the Wild, including the long white scarf of the Stealth Mask.
Red	Resembles the Stealth set after being dyed red in Breath of the Wild.
Indigo	Resembles her appearance in The Legend of Zelda: Ocarina of Time.
Purple	Resembles the Stealth set after being dyed purple in Breath of the Wild.
Green	Resembles the Stealth set after being dyed green in Breath of the Wild.
Black	Resembles the Stealth set after being dyed black in Breath of the Wild. It is complementary to Link's "Dark Link" costume.
Yellow	Resembles the Stealth set after being dyed light yellow in Breath of the Wild.
White	Mildly resembles Impa as she appears in Hyrule Warriors.

Shulk

With the exception of his first and last alternate costumes, all of Shulk's alternate costumes are based on the color schemes of his party members from Xenoblade Chronicles. His hair now also changes colors to match these characters.

Red	Based on Shulk's "Casual" armor set. Officially dubbed "Colony Type I" as of Xenoblade Chronicles: Definitive Edition.
White	Resembles Mecha-Fiora.
Black	Resembles Dunban.
Orange	Resembles Reyn.
Blue	Resembles Sharla.
Lavender	Resembles Melia.
Yellow	Resembles Riki.
Trunks	Based on Shulk's "Swimsuit" armor set and his appearance with armor unequipped in Xenoblade Chronicles. Officially dubbed "Ecru Type" as of Xenoblade Chronicles: Definitive Edition.

Simon

Brown	Based on his appearance in the 1993 Sharp X68000 port of Castlevania.
Red	Based on his appearance in Castlevania II: Simon's Quest.
Yellow	Resembles his appearance on the Western boxart for Super Castlevania IV and his in-game appearance in Haunted Castle, albeit with blonde hair instead of blue. Also resembles Fake Trevor from Castlevania: Symphony of the Night.
Black	Resembles his appearance in the Arrange Mode of Castlevania Chronicles and his in-game appearance in Vampire Killer. Also resembles Christopher Belmont's appearance on the Japanese boxart for Castlevania II: Belmont's Revenge.
Blue	Resembles his appearance on the Japanese boxart for Super Castlevania IV.
Purple	Resembles Cornell from Castlevania: Legacy of Darkness and Joachim Armster from Castlevania: Lament of Innocence.
Orange	Resembles his in-game appearance in Castlevania.
Indigo	Resembles Trevor Belmont's doppelganger from Castlevania III: Dracula's Curse.

Snake

Grey	Based on the sneaking suit worn by Solid Snake in Metal Gear Solid 2: Sons of Liberty.
Black	Resembles the Metal camouflage from Metal Gear Solid 4: Guns of the Patriots.
Red	Resembles the Fire camouflage from Metal Gear Solid 3: Snake Eater.
Blue	Resembles the Water camouflage from Snake Eater.
Green	Resembles the Tiger Stripe camouflage from Snake Eater.
White	Resembles the Splitter camouflage from Snake Eater.
Chartreuse	Resembles the Leaf camouflage from Snake Eater.
Brown	Resembles the Animals camouflage from Snake Eater.

Sonic

Blue	Based on his modern design first seen in Sonic Adventure.
Purple	Resembles NiGHTS, a character from Sega's NiGHTS into Dreams. The cuffs are reminiscent of the purple Chaos Emerald.
Cyan	Resembles Classic Sonic. The cuffs are reminiscent of the Crystal Ring powerup from Sonic Adventure.
White	Resembles Silver the Hedgehog. The cuffs are reminiscent of the blue Ark of the Cosmos from Sonic Riders: Zero Gravity.
Black	The color scheme resembles his 2P costume from Sonic the Fighters and the mid-transformation appearance of Dark Sonic from Sonic X.
Yellow	The cuffs are reminiscent of Silver's bracelets.
Orange	The cuffs are reminiscent of the hand sprite that appears when the player passes through one of Sonic the Hedgehog 2's Special Stage checkpoints.
Green	Resembles his appearance in Sonic the Hedgehog. The cuffs resemble the hand sprite from Knuckles the Echidna in Sonic the Hedgehog 2's Special Stage checkpoints.

Sora

Sora's costumes are based on his outfits from various games in the Kingdom Hearts series. While Sora's physical appearance changes in each game as he grows older, his Smash costumes all use his build from the original game. According to Sakurai, extra effort was put into Sora's alternate costumes due to him being the very last DLC Fighter to be added to Ultimate.

Original	Based on his appearance in the first Kingdom Hearts game. The design itself is meant to be based directly off of Mickey Mouse, with the red pants, white gloves, and bright yellow shoes, and the black jacket representing the exposed furry chest of his classic look.
Two	Based on his appearance in Kingdom Hearts II. The outfit itself was gifted to him by Flora, Fauna, and Merryweather in The Mysterious Tower, with the magic in the outfit giving him the ability to use Drive Forms.
Dream	Based on his appearance in Kingdom Hearts 3D: Dream Drop Distance, within the Sleeping Worlds. The outfit was secretly placed on him by Organization XIII when first entering the Sleeping Realm, with the "X" on his chest acting as a magic marker to help them track his location.
Three	Based on his appearance in Kingdom Hearts III. The outfit itself was gifted to him by Yen Sid, with the magic in the outfit helping hide Sora from the forces of Darkness.
Grey	Based on his appearance in Kingdom Hearts II within Timeless River, a world based upon the original Mickey Mouse cartoons, most prominently Steamboat Willie. It also makes a cameo appearance in Kingdom Hearts III when Sora uses the Phantom Rush and Noise Flux Shotlocks with the Classic Tone Keyblade. This form is a simplified grayscale version of his original Kingdom Hearts design, and features a unique facial design similar to the style of Osamu Tezuka, a famous manga artist inspired by Disney's work. The costume features unique facial expressions. Though his render features detailed hair, in-game, his hair features no detail whatsoever.
Red	Based on Sora's Valor Form from Kingdom Hearts II. To access this form, Sora fuses with Goofy to enhance his physical stats, and allows him to use a second Keyblade.
Blue	Based on Sora's Wisdom Form from Kingdom Hearts II. To access this form, Sora fuses with Donald Duck to enhance his magical stats, and allows him to cast spells with a wider area of effect and use less MP to cast them. The outfit is slightly modified from its appearance in Kingdom Hearts II, to better match the outfit from Dream Drop Distance.
White	Based on Sora's Ultimate Form from Kingdom Hearts III. To access this form, Sora must have access to the Ultima Weapon and use its Formchange ability.

Steve

Three of Steve's alternate costumes replace him with Alex, one replaces him with a Zombie, and one replaces him with an Enderman. The two alternate costumes of both Steve and Alex are based on downloadable skins.

Steve	The first default player skin, with the beard from the early "Classic" builds of Minecraft.
Alex	The second default player skin, with a slightly thinner build.
Steve White	Tennis Steve from the Default Skin Pack added in the first version of the "Legacy Console" edition.
Alex White	Tennis Alex from the Default Skin Pack added in the first version of the "Legacy Console" edition.
Steve Black	Scottish Steve from the Default Skin Pack added in the first version of the "Legacy Console" edition.
Alex Blue	Swedish Alex from the Default Skin Pack added in the first version of the "Legacy Console" edition.
Zombie	A recurring hostile mob. This skin is also available as DLC in the "Bedrock" edition under "Skin Pack 1 - Classic."
Enderman	A recurring neutral mob. The limbs are shorter than in the original game to match Steve's physique, but retain the slim arms and legs that Endermen in Minecraft have. This skin is also available as DLC in the "Bedrock" edition under "Skin Pack 2 - Classic;" however, this skin does not make the player's arms and legs slim.

Terry

Terry's palettes are based on designs from his own games, and the design on his cap changes for each one.

Red	Based on his appearance in The King of Fighters series through the '90s, starting with The King of Fighters '94. The logo on his cap reads "FATAL FURY".
Blue	Resembles his standard alternate palette throughout the Fatal Fury and The King of Fighters series. The logo on his cap reads "FATAL FURY".
Brown	Resembles one of his alternate palettes from The King of Fighters 2002. His cap is blank.
Green	Resembles one of his alternate palettes from The King of Fighters 2002. His cap is blank.
Orange	Resembles his early appearances from Fatal Fury: The King of Fighters to Real Bout Fatal Fury Special. The logo on his cap reads "NEO GEO", as in the earliest official artwork for his original design.
Grey	Resembles one of his alternate palettes from Fatal Fury Special onward. The logo on his cap reads "KING OF THE FIGHTERS", as in Fatal Fury 3: Road to the Final Victory and Real Bout Fatal Fury.
Black	Resembles his alternate palette from Fatal Fury: Wild Ambition. His cap has a metal plate on the front, like his appearance in the Fatal Fury anime films. The material of his jeans is also altered to resemble leather rather than denim.
Yellow	Resembles his C+D alternate palette from The King of Fighters 2000. The logo on his cap closely matches the design used in The King of Fighters XIV, which reads "SOUTH TOWN - HUNGRY WOLF".

Toon Link

Green	Based on his appearance in The Legend of Zelda: The Wind Waker, complete with the Master Sword and Hero's Shield.
Red	Resembles Red Link from The Legend of Zelda: Four Swords and other related titles.
Blue	Resembles Blue Link from the Four Swords titles.
Purple	Resembles Purple Link from the Four Swords titles.
Brown	Resembles Link's appearance in The Legend of Zelda.
Black	Resembles Dark Link and the Interlopers from The Legend of Zelda: Twilight Princess. Also resembles Shadow Link from The Legend of Zelda: Four Swords Adventures.
Grey	Resembles Link's tunic with the Blue Ring equipped in The Legend of Zelda.
Teal	Resembles Link's appearance in The Legend of Zelda: A Link to the Past and its sequel A Link Between Worlds.

Villager

Villager's appearance varies greatly between costumes, with differing eyes, hair, gender, clothing, and skin color. All of Villager's alternate costumes, with the exception of the yellow costume, are based on how the player may look at the start of a new game depending on how they answer questions asked by Kapp'n or Rover in Animal Crossing: Wild World and Animal Crossing: City Folk, respectively.

Red	Male villager wearing a "No. 1 Shirt" as he appears in artwork for City Folk.
Pink	Female villager wearing a "Daisy Shirt" as she appears in artwork for Wild World.
Yellow	Male villager wearing a "Racer 6 Tee". The corresponding starting appearance in Wild World and City Folk instead sports the "Paw Tee" and a different hairstyle.
Green	Female villager wearing a "Turnip Top".
Cyan	Male villager wearing a "Blue Tie-Dye Tee" as he appears in artwork for City Folk.
Blue	Female villager wearing a "Rugby Tee".
Purple	Male villager wearing a "Four-Ball Tee". He has darker skin compared to the previous game.
Chartreuse	Female villager wearing a "Yellow Bolero". She has darker skin compared to the previous game.

Wario

Wario alternates between wearing his biker outfit from WarioWare and his overalls from the Mario and Wario Land games.

Blue	Based on his appearance in the WarioWare series.
Classic	Based on his appearance in the Mario and Wario Land series. Referred to as "Overalls Wario" on the Brawl DOJO!!
Red	Combines elements of his red and black costumes from Brawl, which makes it resembles his Player 1 appearance in WarioWare, Inc.: Mega Party Game$!, albeit with blue gloves, gray pants, and a red belt.
Classic Red	Resembles Mario's appearance in Donkey Kong and one of Wario's alternate colors in Mario Golf.
Yellow	Combines elements of his yellow and green costumes from Brawl.
Classic Cyan	Resembles Mario's appearance on the Japanese boxart for Mario Bros.
Green
Classic Green	Resembles Mario's appearance on the Japanese boxart for Wrecking Crew and Luigi's appearance on the arcade version of Mario Bros.

Wii Fit Trainer

Wii Fit Trainer alternates between the female trainer and the male trainer. Both of them are characters from the original Wii Fit.

Female	Resembles her appearance in Wii Fit; her ponytail is one of multiple potential hairstyles.
Male	Resembles his appearance in Wii Fit; his haircut is one of multiple potential hairstyles.
Green	Resembles her appearance in Wii Fit Plus and Wii Fit U.
Male Green	Resembles his appearance in Wii Fit Plus and Wii Fit U.
Red	The tank top's color is reminiscent of the Aerobics category.
Male Red	The suit's color is reminiscent of the Aerobics category.
Yellow	Resembles her outfit from Wii Fit Plus that appears during Yoga or Strength Training activity in My Wii Fit Plus mode. The tank top's color is reminiscent of the Balance Games category.
Male Yellow	Resembles his outfit from Wii Fit Plus that appears during Yoga or Strength Training activity in My Wii Fit Plus mode. The suit's color is reminiscent of the Balance Games category.

Wolf

Purple	Based on his appearance in Star Fox Zero.
Brown	Resembles his color scheme in Star Fox Zero and Starlink: Battle for Atlas.
Red	Resembles Andrew Oikonny, one of Wolf's teammates, as he appears in Star Fox: Assault.
Blue	Resembles his blue "Player 2" costume from Assault's Versus Mode, as well as being the colors of his design in Brawl.
Green	Resembles his green "Player 4" costume from Assault's Versus Mode.
Orange
Black	Resembles his appearance in Star Fox 2. The artwork shows the lining around his gloves and the collar of his jacket colored red while they're actually colored grey in-game.
Pink	Resembles Pigma Dengar, one of Wolf's former teammates, as he appears in Star Fox: Assault.

Yoshi

Green	Based on a Green Yoshi.
Red	Based on a Red Yoshi.
Blue	Based on a Blue Yoshi.
Yellow	Based on a Yellow Yoshi.
Pink	Based on a Pink Yoshi.
Cyan	Based on a Light Blue Yoshi.
Purple	Based on a Purple Yoshi.
Crafted	Based on his appearance in Yoshi's Crafted World. While the render has a unique "fuzzy" coating, the in-game model simply uses material shaders to the same effect. His shoes and saddle also have a glossier appearance. Replaces his black alternate costume from Smash 4.

Young Link

Green	Based on his appearance from The Legend of Zelda: Ocarina of Time, complete with the Kokiri Sword and Deku Shield.
Red	Resembles the Goron Tunic from Ocarina of Time.
Blue	Resembles the Zora Tunic from Ocarina of Time.
White	Resembles Link's tunic with the Blue Ring equipped in The Legend of Zelda.
Pink	Based on the color scheme of most Fairies, a recurring race of creatures with healing powers, from The Legend of Zelda series.
Cyan	Resembles Link's appearance in The Legend of Zelda: Breath of the Wild. In reference to this design, the costume uniquely changes the color of his legs to brown to resemble Link's Hylian Trousers.
Orange	Reminiscent of the color scheme of the Spirit Medallion in Ocarina of Time.
Black	Resembles Dark Link and the Dark Interlopers from The Legend of Zelda: Twilight Princess.

Zelda

Pink	A combination of her appearances in The Legend of Zelda: A Link to the Past and The Legend of Zelda: A Link Between Worlds.
Red	Resembles her in-game sprite when Link rescues her with the Red Ring equipped in The Legend of Zelda. Similar to the original sprite, her hair is brunette in this costume.
Blue	Resembles her casual appearance in The Legend of Zelda: A Link to the Past.
Violet	Based on Adult Zelda in The Legend of Zelda: Ocarina of Time, which was the basis for her Melee appearance.
Green	Resembles her in-game sprite when Link rescues her with no ring equipped in The Legend of Zelda.
Black	Complementary to Link's "Dark Link" costume.
Purple	Resembles her appearance from The Legend of Zelda: Twilight Princess, which was the basis for her Brawl and Smash 4 appearances.
White	Resembles her in-game sprite when Link rescues her with the Blue Ring equipped in The Legend of Zelda. Also resembles her overworld sprite from A Link to the Past and her white dress from The Legend of Zelda: Skyward Sword.

Zero Suit Samus

Cyan	Based on her design from Metroid: Other M.
Blue	Resembles the Zero Suit at the end of Metroid Prime 2: Echoes.
Red	Resembles her leotard at the end of the original Metroid.
Black	Resembles her outfit at the end of Super Metroid.
Green	Complementary to Samus's "Green Samus" costume.
White	Resembles an outfit from one of the endings of Metroid Fusion. Also resembles the Gunship Mii's Zero Suit from Nintendo Land, albeit with pink Chozo marks instead of green.
Shorts Orange	Based on her Casual Outfit at the end of Zero Mission.
Shorts Blue	Based on her Casual Outfit from one of the endings of Metroid Fusion.

Trivia

• In demo versions of Super Smash Bros. Ultimate, several characters had differences in their available costumes and associated portraits compared to the final game:
  • The Ice Climbers' character select portraits always showed Popo in front, although the stock icons changed to reflect which costumes let the player control Nana.
  • Two of Villager's alternate colors and one of Pokémon Trainer's alternate colors had a lighter skin tone compared to the versions used in the final game.
  • Ridley did not have his Meta Ridley costumes available; instead, two palette swaps were present that used the same colors as the Meta Ridley costumes. These costumes are not used in the final game.
  • Mario, Link, Pikachu and Villager used images of their in-game models for character select portraits instead of their official renders.
    • Coincidentally, all four of these characters were playable in the Smash 3DS demo.
  • Sonic's 4th alternate costume used a pale blue shade of fur rather than white fur like in the previous game. This was changed back for the final release of the game.
  • The stock icon of Inkling's 5th alternate costume had a lighter skin tone, despite being darker skinned in-game.
• Some costumes that were shared through pre-release screenshots on the Ultimate site are slightly different from their appearances in the final build.
  • On Luigi's purple costume, the "L" on his cap was green in screenshots but is purple in the final build.
  • On Wario's yellow overall costume, the buttons on his suspenders were gold in screenshots but are white in the final build.
  • On Wolf's default costume, his jacket and gloves are dark purple, the straps behind his right shin guard are white, and the soles of his boots are red compared to his color scheme in the final build.
• Ultimate is the first game where every character has the same amount of alternate costumes, 8. This does not include Pokémon Trainer and Pyra/Mythra having multiple costumes per player or Mii Fighter costumes.
• Ike, Isabelle, Piranha Plant, Link, Villager, Wario and Wii Fit Trainer are the only characters with an alternative design for half their costumes who do not have a unique render pose for the alternate design.
• Steve is the only character with other characters as alternate costumes not to have the same amount of costumes for each character. Characters with gender swaps have four costumes per gender (excluding Pikachu), Olimar and Alph each have four costumes, Bowser Jr. and each Koopaling have one costume, and each Hero has two costumes. Steve and Alex each have three costumes while Zombie and Enderman only have one each.
• Masahiro Sakurai stated in a YouTube video that he created a game called "Find the Enderman" where he would take a screenshot that the Enderman was hidden somewhere in for the development team to find. This was done to make sure that the Enderman costume is not too dark and is clearly visible no matter the background.
  • Sakurai also revealed that Pyra's P2 costume was intially too dark and its colors were brightened to be more in line with Pneuma.

• 

  The Ice Climbers' demo (top) and final (bottom) costumes.

• 

  Villager's demo (top) and final (bottom) costumes.

• 

  Pokémon Trainer's demo (left) and final (right) costumes.

• 

  Ridley's demo (top) and final (bottom) costumes.