Editing Byleth (SSBU)

|image = {{tabber|title1=Male|tab1=[[File:Byleth SSBU.png|250px]]|title2=Female|tab2=[[File:Byleth-Alt1 SSBU.png|250px]]|title3=Both|tab3=[[File:fighter-byleth.png|250px]]}}

<!--NOTICE BEFORE EDITING: When using pronouns, it is generally preferred, though not strictly required, that they match the gender of the default. If referring to one gender, only refer to the alternate when it specifically applies to them. While using gender-neutral pronouns is optional, it is heavily discouraged. However, completely omitting pronouns and always using the character's name instead is entirely a valid style, as long as the sentence stays coherent.-->

'''Byleth''' (♂: {{ja|ベレト|Bereto}}, ♀: {{ja|ベレス|Beresu}}, ''Byleth'') is a playable character in ''[[Super Smash Bros. Ultimate]]''. Byleth was officially announced on January 16th, 2020 as the fifth and final [[Downloadable content (SSBU)|downloadable character]] from {{h2|Downloadable content (SSBU)|Fighters Pass Vol. 1}}. Both male and female versions are playable. Byleth was released as part of Challenger Pack 5 on January 28th, 2020<!--January 29th, 2020 in Pal and Japanese regions.--> and is classified as [[Fighter number|Fighter #75]].

<!--The fact that M!Byleth was re-cast for FE3H and FEH on January 16, 2020, has no relation to Smash. Please do not re-add this point.-->Zach Aguilar and Jeannie Tirado, who respectively voiced the male and female versions of Byleth in ''Fire Emblem: Three Houses'' and ''Fire Emblem Heroes'', reprise their roles in the overseas version, while {{iw|wikipedia|Yūsuke Kobayashi|voice actor}} and {{s|wikipedia|Shizuka Itō}} reprise their respective male and female roles in the Japanese version.

Byleth is fundamentally optimized as a "distance demon", a character like {{SSBU|Marth}} and {{SSBU|Shulk}} who utilizes large hitboxes to zone out opponents at mid-range. Boasting a variety of weapons, Byleth's overall reach is fittingly long in line with his archetype, and his attacks are generally very strong; to compensate for this, Byleth has poor overall mobility in a similar vein to {{SSBU|Ike}}, {{SSBU|Ganondorf}}, {{SSBU|Incineroar}} and {{SSBU|Dr. Mario}}, high startup and ending lag on many of his moves, and a rather short [[grab]] range. All of this makes Byleth's general gameplan very patient; his sluggishness and strength makes it important for him to plan ahead and learn the opponent's habits, before covering their options with his range and arsenal of hard-hitting weapons.

Like other weapon users, Byleth's attacks have [[hitbox|disjointed hitboxes]] that allow combat to be at a safe distance. Neutral attack is a quick chain of attacks that act as a standard get-off-me option, especially due to the speed of Byleth's moveset. The third hit of neutral attack is good for sending opponents away, and the infinite is a good damage racker that can KO at high percents near the edge. Byleth's tilts all use the [[Sword of the Creator]]. Up and forward tilts have wide hitboxes and decent speed, making them effective spacing attacks. Down tilt is a whip with the sword in chain form, giving it more effective distance and allowing it to combo into aerials. Finally, dash attack is a wide swipe forward, which allows it to punish whiffs but is also easily punishable itself. All of Byleth's up attacks emphasize the Sword of the Creator's extended chain form; up aerial causes him to lash upwards in a flurry, dealing multiple hits and acts as a good tool to deny landings or start a juggle. Its looping hits can also drag opponents downwards to initiate extended combos. Byleth's up special causes him to thrust the chain upwards to grab opponents or ledges. As a combat move, this up special can combo from certain moves, and causes an untechable [[meteor smash]] at high percentages; if used on offstage opponents, Byleth will hop off the opponent's head for a meteor smash, which can cause an unavoidable KO at high percents. This hop also has extremely low ending lag, allowing for certain followups like side special. As a recovery move, the sword grants Byleth a very long [[tether recovery]], which can grab [[Battlefield]]'s ledges as low as near the bottom blast line. Notably, Byleth's up special can attach to walls and perform a wall jump if it touches a wall, much like tether recoveries in ''Melee''. Altogether, these traits provide Byleth with a safe array of covering various approach options.

Byleth's other weapons grant more specialized options. {{s|fireemblemwiki|Areadbhar}}, a lance, is used for Byleth's side-inputted moves (forward smash, forward aerial and back aerial, and side special); it has long range and uses a [[tipper]] mechanic that deals more damage at the tip of the lance. Forward smash is a slow but long-ranged stab that deals more knockback if aimed upward and tippered, allowing it to heavily punish jump options. If aimed downwards, the lance can also hit opponents grabbing ledges. Meanwhile, forward and back aerials are very effective spacing moves, even outranging those of Marth, and the tippers deal heavy knockback. Byleth's side special has him swing [[Areadbhar]] in a slow, but wide swing, and allows him to step forward if the special button is held. Its massive hitbox easily denies jump options and acts as a powerful but risky spacing option, as any character can punish it even when fully spaced if they shield it. All of Areadbhar's moves are weak if the hilt lands, so proper spacing is vital; the sour spots of forward and back aerials can be used to combo or techchase effectively, but will KO less readily. Side special will be extremely weak if the hilt lands, but Byleth will be able to shield to protect themselves even if the hilt is used.

{{s|fireemblemwiki|Aymr}}, an axe, is used for Byleth's down-inputted moves (down smash, down aerial, down special); it is an extremely slow, yet powerful weapon that deals high damage and knockback on all moves that use it. Down smash is slow overall, but hits very hard and can KO as early as 90%. Down aerial is a similarly slow swing downwards with extreme landing lag, but it is the strongest meteor smash in the game when it lands, making it also among the most rewarding. Finally, Byleth's down special causes him to charge [[Aymr]] in a [[super armor]]ed stance, before unleashing a powerful, [[Special Zoom]]-inducing swing. It allows Byleth to pass through platforms and turn around in the opposite direction while charging, which can be used for mindgames. It also has a surprisingly wide hitbox that starts behind Byleth's head, making it much like [[Warlock Punch]]; a high-risk, high-reward move that can catch opponents by surprise. If used in the air, it will be slightly weaker and lose its [[Super Armor]]

Finally, {{s|fireemblemwiki|Failnaught}} is a bow which is used for two of Byleth's neutral-inputted moves (neutral aerial and neutral special). Neutral aerial is a long-lasting, wide-ranged spinning move much like {{SSBU|Palutena}}'s, making it a good option [[out of shield]] due to its fast startup, and can also initiate combos or [[edgeguard]] with its looping hits. Byleth's neutral special also charges up [[Failnaught]] with an arrow, which can be shot at two different strengths: a slow but strong arrow that acts as a sniping option and passable spacing projectile, or a very delayed shot that acts as one of the strongest projectiles in the game, which can also almost break a full shield. The charged projectile also becomes an energy projectile, making it possible to [[absorption|absorb]] it, but not [[inhale]]d nor [[Pocket]]ed. Unlike every {{SSBU|Link}}'s respective [[Bow]]s, Byleth can cancel Failnaught's charge up until slightly after the delayed charge shot begins charging, though he is unable to cancel it after he reaches that point. Byleth's neutral special can also turn around up to two times before the delayed charge shot.

Byleth may have good strengths, but he does also have weaknesses. Due to his mobility being among the worst in ''Ultimate'', his approach is very committal. This flaw is further stressed due to many attacks having slow startup (e.g. down smash/down aerial), narrow hitbox placements (e.g. forward/back aerials), or even both (e.g. forward smash). His dash attack, neutral aerial and side special are exceptions, but are easily punishable on shield due to their ending lag, while the lattermost is dangerously unsafe if the sweetspot does not land. This flaw becomes even more dangerous with Failnaught’s unique charge properties, as while the arrows fired from it are powerful and fast, they are equally as dangerous if reflected as Byleth cannot cancel the move after charging it halfway through. Byleth’s abundance of KO options is also a double-edged sword, as while it makes it easy for him to heavily punish mistakes, it also makes [[counterattack]]s an excellent option to punish his many KO options if used frequently.

Byleth’s grab game is somewhat strong. He does not have a throw that KO’s at realistic percentages, however Down throw is a very strong combo starter at percents below 80, combing into neutral air, forward air, and back air. Up throw is his most damaging throw, but only deals a pitiful 9% and its only real purpose is applying pressure from below. Forward and back throws only serve the purpose of getting the opponent offstage, excluding at very low percents where he can link back throw into dash attack. Byleth also has a very short grab range.

When it comes to Byleth's recovery, his primary recovery, Sword of the Creator, suffers from the same issues as {{SSBU|Joker}}'s normal recovery. Being a tether recovery with high vertical distance, but lackluster horizontal distance. While this combined with his poor air speed would seemingly make Byleth susceptible to gimps, his recovery is actually very strong if used properly. Byleth's up special can recover from halfway between the camera border and blast zone on Final Destination, meaning byleth mostly has to worry about getting in range horizontally. To assist with this, Byleth can use his side special, forward air, up air, neutral air, or back air to hit away opponents, and performing a b-reverse bow charge, cancelled with a jump, will make where byleth is going to be very hard for the opponent to guess.

All in all, Byleth is a ranged powerhouse with great offensive potential due to his weaponry, which comes with varying uses depending on each weapon. Byleth's arsenal grants him access to a mixture of highly damaging attacks, KO options, combos, and setups. However, Byleth's slow mobility and poor overall frame data means he must be careful with his offensive techneques. Byleth players must strategically use the tools they have and be very patient in order to punish their opponent's mistakes, as a careless move on Byleth's end will easily give his opponent just as big of an opening.

Byleth has been buffed slightly via update 11.0.0. He received a few improvements to his down smash, down aerial, [[Areadbhar]], and [[Sword of the Creator]], while the duration of his [[crumpling]]-induced vulnerability was standardized to match the rest of cast.

*Byleth features a multitude of weapons throughout his moveset, all which utilize the Heroes' Relics from ''Fire Emblem: Three Houses''. Each weapon is designated to a different attacking direction (neutral, side, up, down).

**The {{s|fireemblemwiki|Sword of the Creator}} is Byleth's default weapon, and is wielded throughout all animations that do not involve any other weapon. It is used for Byleth's flurry attack, tilts, throws, and get-up attacks, though it is also designated to upward-inputted moves like up smash, up aerial, and up special. Certain moves cause the sword to change into its whip form, extending its reach. The sword lets him [[wall jump]] three times in his up special.

**{{s|fireemblemwiki|Areadbhar}} is a lance wielded by {{s|fireemblemwiki|Dimitri}}. It is used for Byleth's side-inputted moves, such as forward smash and back aerial. Areadbhar features a [[tipper]] mechanic similar to Marth's, with the hilt dealing comparatively low knockback and damage and the tip dealing 1.5× the damage of a hilt hit.

**{{s|fireemblemwiki|Aymr}} is an axe wielded by {{s|fireemblemwiki|Edelgard}}. It is used for Byleth's downward-inputted moves, such as down smash and down special. Aymr boasts incredibly high damage and knockback on all moves that feature it, though at the cost of extreme lag.

**{{s|fireemblemwiki|Failnaught}} is a bow wielded by {{s|fireemblemwiki|Claude}}. It is used for two of Byleth's neutral-inputted moves, neutral aerial and neutral special. Unlike the previously mentioned weapons, Failnaught does not feature any particular traits.

|neutraldesc=A knifehand strike, followed by a roundhouse kick, followed by a sidekick. If the button is mashed, unleashes a flurry attack with the whip. This is Byleth's fastest attack, though the first hit has limited range. Holding the attack button causes Byleth to repeat the first hit, albeit rather slowly.

|ftiltdesc=An elegant outward slash done at a downward angle. A decent spacing tool due to its range, with decent power as well.

|utiltdesc=Swings his sword in an upward arc from front to back, akin to {{SSBU|Mii Swordfighter}}'s up tilt. An effective juggling tool.

|dtiltdesc=A low-angled crack of the whip. It has very good horizontal range, and despite its slow startup for a tilt attack, the move is one of Byleth's best combo starters thanks to its upward knockback trajectory, with follow-ups such as up tilt, neutral aerial, up aerial or up special, depending on the opponent's percent.

|dashdesc=An inward swipe while sliding forward. A quick and useful burst option for punishing landings, though it has a noticeable amount of ending lag. The move has a sourspot up close, unlike other sword attacks. The sweetspot (located near the tip) boasts respectably good horizontal KO power.

|fsmashdesc=Thrusts Areadbhar forward. It has tremendous range, with the sweetspot located on the tip of Areadbhar being extremely powerful. It is fairly slow for a forward smash, however, and has a fairly weak sourspot covering the shaft of the lance. It can be angled, with the upward-angled variant being stronger, and the downward-angled variant being weaker in exchange for being able to more reliably hit shorter, crouching, prone or ledge-hanging opponents. Byleth may occasionally say either "Areadbhar!" or "There!" while using this move. Can be used to 2 frame opponents. The animation of Byleth forward smash is similar to Paraselene, a combat art learned exclusively by Dimitri once mastering the Great Lord class in Three Houses

|usmashdesc=Flails the whip above himself, hitting multiple times, akin to {{SSBU|Zero Suit Samus}}. This is Byleth's fastest smash attack and is useful for juggling opponents and covering landings. It is also decently strong for an up smash of its kind as well.

|dsmashdesc=Sweeps Aymr from front to back. Both hits are equally powerful, and deal extremely high damage and knockback for a down smash, being the strongest in the game. Deals extremely high shield damage, with a fully-charged down smash being able to break a nearly full shield with one hit. However, it is extremely slow compared to other down smashes. Byleth may occasionally say either "Aymr!" or "Take this!" while using this move.

|nairname=

|nairdesc=Spins Failnaught around himself, hitting multiple times. Byleth's fastest aerial attack. It is useful for edgeguarding and approaching, has some combo potential, and it also possesses a landing hitbox, making it a useful multi-purpose aerial attack. Byleth may occasionally say "Failnaught!" while using this move.

|fairdesc=Swings Areadbhar horizontally forward. A decent spacing tool that is fairly safe if spaced at the tip and fast-fallen. The tip has decent horizontal knockback, whereas the shaft is overall weak in comparison. Has the lowest ending lag and landing lag of Byleth's aerial attacks, and is the only one that can autocancel in a short hop.

|bairdesc=Thrusts Areadbhar backward. Similar to forward aerial in terms of utility, but it exchanges speed for additional power. One of Byleth's best horizontal KOing options if tippered.

|uairdesc=Flails the whip upward, hitting multiple times. A decent tool for juggling thanks to its long duration and excellently disjointed vertical range. Has excellent vertical KO power.

|dairdesc=Swings Aymr downward, with the ability to [[meteor smash]] opponents. Deals heavy damage to shields and has long range. It is the strongest meteor smash from a down aerial move in ''Ultimate'', with the sweetspot KOing grounded opponents starting at 85%. However, it is extremely slow to start, has a lot of ending lag, only autocancels from a double jump, and its landing lag is among the highest out of any conventional down aerial in the entire game.

|grabname=&nbsp;

|grabdesc=Reaches out with his left hand.

|pummelname=&nbsp;

|pummeldesc=Knees the opponent.

|fthrowdesc=An upward slash with the sword in its whip form.

|bthrowdesc=Wraps the Sword of the Creator around his opponent and swings them around twice, throwing them behind on the second spin. Much like Mario's back throw, it can damage and launch nearby opponents as collateral. Byleth's strongest throw, however, it fails to KO until very high percents.

|uthrowdesc=Shoves the opponent upward with his sword. Can combo into up special at low percents but this is easily DI'd.

|dthrowdesc=A downward slash with the sword in its whip form. It sends opponents directly in front of Byleth, allowing it to start combos at 0%, usually into forward tilt or forward aerial.

|floorfdesc=Slashes behind and then in front of himself.

|floorbdesc=Same as his front floor attack.

|edgedesc=Performs a low outward slash while climbing up.

|nsdesc=Byleth pulls out the Hero's Relic Failnaught to fire an arrow. He can charge it for more speed and damage, change directions while charging, and can [[charge-cancel]] with a shield until a certain duration. Charging at its maximum duration will fire a powerful arrow that has a similar animation and range to the [[staff]] item. A fully charged arrow can nearly break full shields. It must be charged a bit before it can be fired, similarly to how [[Bullet Climax]] cannot be shield-canceled instantaneously and must charge first. Byleth may occasionally say "Failnaught!" while using this move. The fully charged version pushes Byleth back and up when used in the air.

|ssdmg=17.25% (ground tip), 11.5% (ground shaft), 14.25% (aerial tip), 9.5% (aerial shaft)

|ssdesc=Byleth lunges forward while swinging the Hero's Relic Areadbhar upward with impressive horizontal and vertical range. If the move is smash-inputted, Byleth lunges forward farther, further improving its range. The aerial version has him spin it in an arc around him, covering an area that his aerial attacks cannot, but at expense of lag. Areadbhar possesses a [[sweetspot]] on its blade, as opposed to the weaker shaft. Byleth may occasionally say "Areadbhar!" while using this move.

|usdmg=1% (hit), 3% (grab), 6.5-13% (bounce)

|usdesc=Byleth whips the Sword of the Creator upward, acting as a [[tether recovery]] similar to Joker's [[Grappling Hook]] in function. It can also attach to walls and allow Byleth to jump off, up to three times consecutively without landing. If it connects with an opponent, Byleth latches onto the opponent before footstooling them, dealing damage based on how far away the opponent was; if their percentage is at least 50% when they are footstooled, it becomes an [[Tech|untechable]] [[meteor smash]]. This footstool has only one frame of ending lag, allowing Byleth to immediately follow up with any of his aerials or special moves, with combos into moves such as neutral aerial (though this particular combo is only effective against {{SSBU|Donkey Kong}}), back aerial, and reverse-inputted side special. Against grounded opponents, the move first launches them up with the sword to allow Byleth to latch onto them. When activated in the air, it instantly cancels all of Byleth's knockback, which can improve his survivability.

|dsdmg=30% (ground hit), 8% (shockwave), 25% (aerial hit), 8% (aerial shockwave)

|dsdesc=Byleth channels all of his energy into a sluggish but colossally powerful slash using the Hero's Relic Aymr. It has [[super armor]] during startup, can be reversed, and Byleth can drop through platforms while performing it. Like other "bold" moves (such as [[Falcon Punch]], [[Warlock Punch]], and [[Hatchet Man]]), it triggers [[Special Zoom]]. When successfully executed, Aymr can break shields in a single hit. When it is used successfully while falling off the battlefield, by an edge, and it hits the battlefield, Byleth will be suspended, ending the fall. Much like the aforementioned "bold" moves, it expectedly has extremely high lag all around in exchange for its power, making it a very risky yet rewarding move mainly used for hard reads. Byleth may occasionally yell "A...ymr!" while using this move. When used in the air, Byleth is stalled slightly just before the hitbox comes out. The animation itself is based on Flickering Flower, a combat art learned exclusively by Edelgard once mastering the Emperor class in Three Houses.

|fsdmg=10% (initial hit), 20% (strike), 15% (end), 45% (total)

|fsdesc= Byleth lashes out with the Sword of the Creator, exclaiming "I'll finish with this!" The lash itself has a decent range and can trap up to three opponents at once. Upon a hit, he and Sothis combine their power to perform Byleth's signature Combat Art Ruptured Heaven, with Sothis saying "Your will and mine be now as one!", as Byleth extends the Sword of the Creator to unleash an earth-rending twister. As the targets are struck by the shockwave, Sothis says "The end approaches!" before they are launched diagonally upwards with respectable power.

*Warps onto the stage using a warp circle, poses while holding a pointer, then pulls out his sword.

* '''Up taunt''': Swings the Sword of the Creator to his right leg, and puts his left fist to his chest while looking into the sky. Female Byleth has an altered stance, with one foot in front of the other, and with the Sword of the Creator held behind her in a reversed grip. Based on Byleth's victory pose with a sword equipped.

* '''Down taunt''': Swings the whip-sword around himself and says, "Try me."

<!--SSBUFemaleBylethTaunt1.gif|Female Byleth's up taunt-->

*Twirls the Sword of the Creator into a backhanded grip while striking a pose, before returning to his original position. If using a female costume, the Sword of the Creator is instead held in a standard grip with a more energetic pose. Based on the animation when Byleth is selected on the map before moving and when performing a gambit. Both idle poses resemble their official renders.

*Plants the Sword of the Creator into the ground along with the other Hero's Relics already planted into the floor, says "Each battle, a chance to grow," then swings the left arm out while facing the background, lowering the said arm to the side. Combines one of Byleth's lines after winning a battle exchange pre-time skip with the game over screen in ''Fire Emblem: Three Houses'', where all four main Relics are planted on the ground.

*Swings the Sword of the Creator outward, saying "Allow me to demonstrate!" He then raises his left hand towards his chest as he looks outward. Based off of Byleth's victory pose when wielding a sword, combined with one of his critical hit quotes prior to the time skip.

*With the Sword of the Creator in its whip form, Byleth swings it around the front of his body in a circular motion, saying "No hesitation!" After striking the ground, the sword reverts to its original form, with Byleth posing with it held in a standard grip. Uses the quote from one of his critical hit activations.

**When this victory pose plays, the clapping animations are delayed for a second before showing up, most likely due to the number of graphics on screen from the sword hitting the ground.

*Swings the Sword of the Creator outward before holding the sword behind her in a reverse grip, saying "Allow me to demonstrate!" She then looks toward the screen as opposed to looking into the distance.

*With the Sword of the Creator in its whip form, she swings the whip in front of herself twice (each time in a different direction) while saying "No hesitation!" She then holds it up towards her face in a vertical manner.

==In competitive play==

Because of limited tournament play (largely due to the [[COVID-19 pandemic and its impact on competitive Smash|COVID-19 pandemic impacting tournaments]]), it is hard to say where Byleth stands in terms of viability in competitive play.

Some pros have stated the character looks promising, including {{Sm|MkLeo}} who considers Byleth as a high-tier. Both Leo and {{Sm|Pink Fresh}} were able to take 1st place at their respective locals with the character. However, other pro players believe the character is not as promising, mainly citing the character's poor frame data, slow ground and aerial speed, and limited landing options as huge drawbacks, being considered as a mid-tier. Many have noted how Byleth struggles against faster characters such as {{SSBU|Fox}}, {{SSBU|Zero Suit Samus}}, and {{SSBU|Sonic}}.

The shift in online competitive play, and the limited tournaments because of the pandemic, only allowed the perspective of online to be notable. {{Sm|MkLeo}} proved to utilize Byleth online, claiming placements like 7th at {{Trn|Frame Perfect Series 4: ONLINE}}, 2nd at {{Trn|The Box: Lunch Box 3}} and {{Trn|The Airlock}}, and 1st place finishes at {{Trn|Frame Perfect Series: ONLINE}} and {{Trn|Ultimate 32}}.

===Notable players===

<!--If you are planning to add a player you consider to be notable, please provide tournament results in some shape or form in the edit summary (be it a link to a results thread or bracket of placing high in a tournament of other notable players or a video of them beating a notable player). Winning tournaments without notable players present are generally not enough to warrant a spot.-->

''Any number following the Smasher name indicates placement on the [[Fall 2019 PGRU]], which recognizes the official top 50 players in the world in [[Super Smash Bros. Ultimate]] from July 13th, 2019 to December 15th, 2019.''

''See also: [[:Category:Byleth professionals (SSBU)]]''

*{{Sm|Blade|Mexico|p=Mexico}} - Placed 3rd at both {{Trn|Smash Vertex}} and {{Trn|ChillHouse}} using Byleth as one of his characters. He has defeated players such as {{Sm|Chag}} and {{Sm|Sparg0}}.

*{{Sm|MkLeo|Mexico}} (#1) - Placed 1st at {{Trn|Frostbite 2020}} using Byleth as one of his characters in grand finals against {{Sm|Maister}}. Has also won a local with Byleth, while defeating {{Sm|Javi}}.

*{{Sm|Nicko|USA}} (#36) - Placed 2nd at {{Trn|LVL UP EXPO 2020}} to defeat {{Sm|Tux}} with Byleth. Also has wins over {{Sm|Eon}}, {{Sm|Nitro}}, {{Sm|MastaMario}}, {{Sm|Ki}}, and {{Sm|Rival|p=SoCal}} in [[SoCal]] tournaments with Byleth.

*{{Sm|Pink Fresh|United States}} - Placed 1st at [https://smash.gg/tournament/the-grind-fridays-112/events/smash-ultimate-singles/standings The Grind 112] using Byleth, notably against {{Sm|ZD}}.

*{{Sm|Tickle|Canada}} - Has a strong Byleth secondary. Has beaten {{Sm|Locus}}, {{Sm|Irakaz}}, and {{Sm|Legit247}} using Byleth.

*{{Sm|Zackray|Japan}} (#7) - Placed 1st at {{Trn|Sumabato SP 12}} using Byleth as one of his characters. He has defeated players such as {{Sm|T}}, {{Sm|Etsuji}}, {{Sm|HIKARU}}, and {{Sm|Eim}}.

Byleth's Classic Mode route is themed around the ''Fire Emblem'' fighters and stages from across the ''Smash'' series, fought in order of release year. All battles are stamina battles and the player always starts with 100 HP.

|1||{{CharHead|Marth|SSBU|hsize=20px}}||[[Temple]]||''{{SSBUMusicLink|Fire Emblem|Story 5 Meeting}}''||References how Marth used Temple as his [[home stage]] in ''[[Super Smash Bros. Melee]]'', due to the game not having a ''Fire Emblem'' stage. Marth starts with 100 HP.

|3||{{head|Ike|g=SSBU|s=20px}} {{Head|Ike|g=SSBU|s=20px|cl=Brown}} {{SSBU|Ike}} (x2)||[[Castle Siege]]||''{{SSBUMusicLink|Fire Emblem|Eternal Bond}}''||The ''Radiant Dawn'' Ike will appear once the ''Path of Radiance'' Ike is defeated. Both Ikes start with 100 HP.

|4||{{CharHead|Robin|SSBU|hsize=20px}}, {{CharHead|Chrom|SSBU|hsize=20px}}, and {{CharHead|Lucina|SSBU|hsize=20px}}||[[Arena Ferox]]||''{{SSBUMusicLink|Fire Emblem|Id (Purpose) (Remix)}}''||Team battle. Robin, Chrom, and Lucina start with 50 HP.

|5||{{head|Corrin|g=SSBU|s=20px}} {{head|Corrin|g=SSBU|s=20px|cl=Black}} {{SSBU|Corrin}} (x2)||[[Coliseum]]||''{{SSBUMusicLink|Fire Emblem|Lost in Thoughts All Alone (for 3DS / Wii U)}}''||Team battle. The two Corrins wearing white and black, respectively, is a reference to ''Birthright'' and ''Conquest'' and the conflict against the Hoshido and Nohr kingdoms. They start with 100 HP.

|6||{{Head|Byleth|g=SSBU|s=20px|cl=Red}} {{head|Byleth|g=SSBU|s=20px|cl=Blue}} {{head|Byleth|g=SSBU|s=20px|cl=Yellow}} Byleth (x3)||[[Garreg Mach Monastery]]||''{{SSBUMusicLink|Fire Emblem|Fódlan Winds}}''||Represent the house leaders in ''Fire Emblem: Three Houses''. The red Byleth prefers down specials, the blue one prefers side specials, and the yellow one prefers neutral specials, referencing the primary weapons of Edelgard, Dimitri, and Claude respectively. The costumes will still be worn even when playing with one of them. They each start with 50 HP.

|colspan="5"|Bonus Stage

|Final||{{SSBU|Master Hand}} and {{SSBU|Crazy Hand}}||{{SSBU|Final Destination}}||''{{SSBUMusicLink|Fire Emblem|Code Name: F.E.}}''||The player has {{head|Marth|g=SSBU|s=20px}} Marth, {{head|Roy|g=SSBU|s=20px}} Roy, {{head|Ike|g=SSBU|s=20px}} Ike, {{head|Robin|g=SSBU|s=20px}} Robin, and {{head|Corrin|g=SSBU|s=20px}} Corrin as CPU allies with 30 HP.

Male Byleth's fighter spirit can be obtained by completing [[Classic Mode]]. Unlocking Byleth in World of Light allows the player to preview the first spirit below in the Spirit List under the name "???".  As a fighter spirit, it cannot be used in Spirit Battles and are purely aesthetic. Female Byleth has a fighter spirit of her own, available periodically for purchase in the shop for 300 coins, but only after Byleth has been downloaded. Each fighter spirit has an alternate version that replaces it with its artwork in ''Ultimate''.

SSBU spirit Byleth (Male).png|1380. '''''Byleth (Male)'''''

SSBU spirit Byleth (Female).png|1381. '''Byleth (Female)'''

==In Spirit battles==

Byleth unlock notice SSBU.jpg|Byleth's unlock notice.

Byleth amiibo.png|Byleth's Amiibo

SSBUWebsiteByleth1.jpg|Both male and female Byleth on [[Umbra Clock Tower]].

SSBUWebsiteByleth2.jpg|Female Byleth using her [[back aerial]] on [[Garreg Mach Monastery]].

SSBUWebsiteByleth4.jpg|Byleth's costumes based on Dimitri, Edelgard, and Claude.

SSBUWebsiteByleth5.jpg|Female Byleth using [[Aymr]] against {{SSBU|Zelda}}'s [[Phantom Slash|Phantom]] in [[Pirate Ship]].

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*Byleth's internal codename is "master", referencing his role as a professor in ''Fire Emblem: Three Houses''.

*Byleth is the first fighter with multiple taglines. In Byleth's case, it is because the male and female variants have different names in Japanese.

*Byleth is the only character in Vol. 1 of the Fighters Pass to not be from either a third-party company or a new universe, and is the second such DLC character for ''Super Smash Bros. Ultimate'', after {{SSBU|Piranha Plant}}.

*Byleth is the third ''Fire Emblem'' character that is DLC. The first two were Roy and newcomer Corrin in ''SSB4''.

*Byleth, like {{SSBU|Ike}}, {{SSBU|Pokémon Trainer}}, {{SSBU|Wii Fit Trainer}}, and {{SSBU|Inkling}}, is one of the few characters to have {{SSBU|alternate costume}}s with different animations.

**Female Byleth holds the Sword of the Creator with its tip pointed upwards, while male Byleth holds it with its tip pointed downwards. All animations that can be played from their stand animations (like their idle animations) are subsequently affected through the animation blending.

**Their [[victory pose]]s are different. Byleth is also the only fighter where the camera angles will also change depending on the costume, rather than just the animations.

*With his debut in ''Three Houses'' in July 2019, Byleth is currently the most recent fighter to appear in ''Ultimate'' and, by extension, the entire ''Super Smash Bros.'' series. He is also the first character in the game to make his gaming debut after ''Ultimate''{{'}}s original release in December 2018, which was also the case with fellow ''Fire Emblem'' characters [[Roy]] and [[Corrin]] in their debuts.

*Byleth is the fifth fighter to receive an invitation letter in his reveal trailer (albeit through [[Sothis]]), following {{SSB4|Villager}}, {{SSBU|Isabelle}}, {{SSBU|Joker}}, and Terry.

* According to Sakurai's column, the reason for Byleth's use of the Hero's Relics was to make him differentiate from all the other sword fighters.<ref>https://nintendoeverything.com/sakurai-on-the-creation-of-byleth-in-super-smash-bros-ultimate/?fbclid=IwAR04CXGocnLzKdc6Zmb_JJ5Zkjf2FImrITmsODwe70k-Pn8Deho4BidopOM</ref>

*When either male or female Byleth is [[Star KO]]'d, they shout, "My battle ends here...!" This is a reference to a line of dialogue when they exhaust their health in ''Fire Emblem: Three Houses''. Byleth shares the distinction of speaking a full sentence during a Star KO with {{SSBU|Pit}}.

**Both, additionally, do not say a sentence in Japanese.

*Both genders of Byleth in the English version use their heavy knockback scream rather than their standard KO scream when KO'd by reaching 0 HP during their final stock in [[Stamina Mode]]. This also applies to {{SSBU|Mario}}, {{SSBU|Dr. Mario}}, Hero, and Terry.

**Additionally, Byleth in the Japanese version uses a unique voice clip when KO'd in Stamina Mode. This trait is shared with Joker and {{SSBU|Banjo & Kazooie}}.

*Byleth is the first DLC character to appear in multiple [[Spirit]] Battles as both the main opponent and a minion, the other being Steve.

**Byleth is also one of two DLC characters whose default appearance does not appear in these battles, the other being Min Min and Steve.

*Unlike most humanoid fighter models in ''Ultimate'', the bind pose of both Byleth genders is uniquely an "A-pose" instead of a [[T-pose]].<ref>[https://twitter.com/firubiii/status/1222377730550980610]</ref> This is shared with Terry and {{SSBU|Mythra}}.