Editing Mythra (SSBU)

{{disambig2|Mythra's appearance in ''[[Super Smash Bros. Ultimate]]''|the character in other contexts|Mythra}}

|image        = {{tabber|title1=Solo|tab1=[[File:Mythra SSBU.png|250px|Mythra]]|title2=With Pyra|tab2=[[File:Pyra & Mythra SSBU.png|250px]]}}

:{{Cquote|Mythra Awakens!|cite=Introduction tagline}}

'''Mythra''' ({{ja|ヒカリ|Hikari}}, ''Hikari'') is a playable character in ''[[Super Smash Bros. Ultimate]]''. She was confirmed as a playable character alongside {{SSBU|Pyra}} during the February 17th, 2021 [[Nintendo Direct]], and were released as part of Challenger Pack 9 on March 4th, 2021 in {{h2|Downloadable content (SSBU)|Fighters Pass Vol. 2}}. While her moveset is similar to Pyra's (aside from three of her [[Special moves]] and [[Final Smash]]), she is not classified as an [[Echo Fighter]], and is instead a transformation semi-clone of Pyra. As such, Mythra is classified as [[Fighter number|Fighter #80]]. While Pyra is the selectable character by default across all palettes, the player can choose to start as Mythra by clicking on her in their fighter portrait at the character selection screen, in the same manner as one chooses which Pokémon to start with when choosing {{SSBU|Pokémon Trainer}}.

In all regions, Skye Bennett reprises her role as Mythra in English and Shino Shimoji reprises her role in Japanese, both with all new voice clips.

Mythra is the faster Blade of the Aegis duo, possessing vastly superior speed and overall frame data to her counterpart, but weaker attacks and worse range. A light-middleweight weighing the same as the {{SSBU|Ice Climbers}}, {{SSBU|Lucario}}, {{SSBU|Wolf}}, {{SSBU|Villager}} and {{SSBU|Steve}}, Mythra boasts the eleventh-fastest [[air speed]], eighth-fastest [[walk]]ing speed, seventh-fastest [[falling speed]], seventh-highest [[gravity]] value, fifth-fastest [[Dash|running]] speed and the fastest initial [[dash]] in the game, as well as decent [[traction]]. However, Mythra's [[Jump|full hop]] height is below-average, while her [[short hop]], [[double jump]] and [[air acceleration]] values are merely average. Overall, this makes her a character similar to the likes of {{SSBU|Captain Falcon}}, {{SSBU|Sheik}}, {{SSBU|Chrom}} or {{SSBU|Little Mac}}; she is a very fast and generally offense-oriented character who excels at whiff [[punish]]ing, [[tech-chasing]], [[combo]]ing, [[juggling]] and maintaining stage control in the [[neutral game]], and has access to useful burst options as well. Being a swordfighter who fights with her [[List of swords#Aegis Sword|Aegis Sword]], almost all of Mythra's standard attacks (barring the first hit of neutral attack) are also [[disjointed]] as well, aiding her in directly challenging incoming attacks.

One of Mythra's greatest strengths is the speed and utility of her grounded moveset. [[Neutral attack]] is Mythra's fastest move, coming on frame 2; this makes it useful for intercepting opposing attacks or sometimes even approaching, the latter thanks to her incredibly fast ground speed. Her [[dash attack]] is fast by swordfighter standards, coming out on frame 9, and it also provides her with solid forward momentum that makes it fairly useful as a burst option. All three of Mythra's [[tilt attack]]s are fairly quick moves with all of them possessing the ability to start combos: [[down tilt]] has fast startup and very low ending lag, as well as fairly low knockback even at very high percents, allowing it to combo into most of her standard moveset; [[up tilt ]]can combo into itself and/or most of her aerials; and even [[forward tilt]] can combo at low to mid percents. The speed of Mythra's tilts can make them difficult to react to, and good spacing can sometimes potentially also make them difficult to [[punish]] as well. Finally, her [[smash attack]]s are decently fast KOing options with solid range: forward smash comes out on frame 14 and is her strongest smash attack with the most range, but has the slowest startup of her smashes; up smash comes out on frame 9 and has a lingering hitbox, making it a decent [[out of shield]] option from the front; and down smash is her fastest smash attack, coming out on frame 8, and hits twice simultaneously on both sides. However, Mythra's smash attacks are fairly weak; they only KO at moderately high percents, even when fully charged.  

Mythra's aerial attacks are also fairly decent as well. Her up, back and down aerials can all [[autocancel]] in a short hop, and except for down aerial, all of her aerials come out on frame 10 or sooner. [[Neutral aerial]] hits three times and provides good coverage all around her; similarly to {{SSBU|Byleth}}'s, it also possesses a landing hitbox, which can be used to start combos. Her [[forward aerial|forward]] and [[back aerial]]s are good combo finishers (with back aerial more importantly also being useful for starting or extending combos), covering a decent area in front and/or behind her. [[Up aerial]] is a good juggle move, and has an extremely generous autocancel window, even more so than all her other aerials. Finally, [[down aerial]] completely lacks the [[meteor smash]]ing capability of {{SSBU|Pyra}}'s equivalent move, but it is Mythra's most damaging aerial attack if hit with the clean hit of the move, and possesses the most KO power of her aerials as well.

Mythra's special moves are also fairly versatile as well. [[Lightning Buster]] is a chargeable move that comes out on frame 9 when uncharged; charging it increases the move's power, and the move even possesses a hitbox on Mythra's sword while charging (nicknamed the "bustersaw" hitbox); it can KO most opponents near the edge at around 100% with a mild charge, and it can even be used off-stage as a mixup to cover airdodges. Lightning Buster can even be reversed after charging, similarly to {{SSBU|Mii Swordfighter}}'s [[Blurring Blade]] and {{SSBU|Sephiroth}}'s [[Shadow Flare]], which can potentially be used for [[mindgame]]s. [[Photon Edge]] is a useful burst option which can hit up to six times and  and has decent damage output as well; it can be difficult to challenge thanks to the move's hitboxes being placed on the multiple visible Mythra duplicates, none of which have a hurtbox, and it can also be used as a horizontal recovery option as well. [[Ray of Punishment]] starts on frame 10, making it a decent [[out of shield]] option when combined with the initial slash's hitbox, and the initial slash in particular combos into the resulting projectile; holding the special button or pressing it more than once turns the move into Chroma Dust instead, with the singular downward projectile instead replaced with multiple smaller projectiles. Ray of Punishment in particular is also an excellent combo finisher as well. As a recovery move, Ray of Punishment/Chroma Dust is capable of sweetspotting ledges while rising, and if Mythra goes past a ledge, the projectile(s) can somewhat cover her ledge grab. Lastly, Mythra can [[Swap]] to {{SSBU|Pyra}}, exchanging Mythra's aforementioned speed with Pyra's superior range and damage output.

Mythra's [[grab]] game is not nearly as overwhelming as the rest of her moveset, but it is not without its uses. Her standing grab has average range, but it is slightly disjointed and is tied for the fastest in the game startup-wise. Her [[dash grab|dash]] and [[pivot grab]]s also have similarly slightly disjointed grabboxes as well, with the former in particular additionally having decent forward momentum. Her [[pummel]] has average speed but an above-average damage output, making it a decent one overall. [[Down throw]] is her most damaging throw, and it is also her main combo throw, leading into aerials at low to medium percentages. [[Forward throw]] can confirm into dash attack at low percentages, and can also set up tech-chases and edgeguards. [[Back throw]] can be used for positioning or setting up edgeguards, but is less useful than down and forward throws. Finally, her [[up throw]] is her least useful throw, although it is difficult to react to and can potentially set up juggles.

In addition to her moveset, Mythra also possesses a special mechanic called [[Foresight]], which functions similarly to {{SSBU|Bayonetta}}'s [[Bat Within]]. If Mythra dodges a few frames before she would have been hit by a move, Mythra takes roughly 50% of that move's damage and no knockback, while the opponent suffers additional lag and is put in a [[slowdown]] state similarly to [[Witch Time]], allowing Mythra a free combo, neutral win or even a KO. This helps her disadvantaged state, as Foresight allows her to escape slightly untrue combos or juggles.

Despite her immense agility, Mythra is balanced by a severe lack of KO options (although swapping to {{SSBU|Pyra}} remedies this completely). Outside of her smash attacks and charged Lightning Buster, none of her moveset reliably kills at the ledge at 150%; however, Mythra still has the ability to combo several of her weaker attacks into those moves (such as comboing down tilt into Lightning Buster via the "bustersaw" charging hitbox) for potential KO confirms, which may alleviate this weakness. Additionally, Mythra's raw damage output is also very poor, a weakness shared with {{SSBU|Sheik}}. This also ties into yet another weakness that Mythra has; outside of her aerials, forward and down tilts, and sufficiently charged Lightning Buster, none of Mythra's moves are safer than -11 on shield, which can make her vulnerable to shield grabs and aggressive [[out of shield]] options if her attacks are not properly spaced. Also, her range is only average for a swordfighter, and she lacks a projectile outside of her up special, meaning she can sometimes struggle against certain zoners, although her excellent mobility compensates for that. Mythra's grab game is also not without its flaws, either; starting at higher percents, her throw combos stop being true, limiting the utility of her forward and down throws (especially the latter). None of her throws reliably KO either, even at Sudden Death percentages. Her only utility from her throws at these percentages is positional throws.

Her special moves, while decent, have weaknesses to balance them out. While Lightning Buster is a potential KO option, it only covers one side of Mythra (except for the first hit, which hits both behind and in front of her), leaving her open if misused. Photon Edge is very unsafe on shield and renders Mythra helpless if used in the air. It also does not sweetspot the ledge until after the move ends. Additionally, Photon Edge has [[transcendent priority]], meaning that it is easily intercepted by most projectiles; and while the hitboxes have impressive horizontal disjoint, they are not very vertically disjointed from Mythra's main hurtbox, which is static and does not match up with the Mythra duplicates visible during the move, meaning that if she recovers using the move, she is highly vulnerable to [[meteor smash]]es from directly above (especially if she recovers low with the move). Ray of Punishment also covers decent vertical distance but little horizontal distance, although Mythra does have decent horizontal drift afterwards.

Perhaps Mythra's single biggest weakness, however, is her very limited recovery, a weakness shared with {{SSBU|Pyra}}. Although she has very good air speed, her double jump height is merely average at best, her falling speed is incredibly fast, and as mentioned before, Ray of Punishment has poor horizontal travel distance, while Photon Edge leaves Mythra [[helpless]] and does not snap to ledges until the very end. If Mythra uses Ray of Punishment's downward projectile to [[stage spike]] an off-stage opponent while she is recovering, they can [[wall jump tech]] after getting hit by the projectile and punish her, similarly to the [[Tech Check]] technique. Mythra is also susceptible to semi-spikes, as getting hit by a sufficiently strong one means that she will be too low to use Photon Edge, and likely will not be able to cover the required horizontal distance with Ray of Punishment either.

Disadvantage can also be difficult for Mythra, though doable with Foresight. Her fast falling speed and high gravity render her susceptible to certain combos (such as {{SSBU|Steve}}'s jab/forward tilt combos), and her average-at-best air acceleration can make it difficult for her to adjust her aerial drift while being juggled compared to other speedy characters with superior air acceleration, such as {{SSBU|Fox}}, {{SSBU|Sheik}} and {{SSBU|Zero Suit Samus}}. And unlike {{SSBU|Pokemon Trainer}}'s [[Pokemon Change]], Swap does not grant intangibility until frame 6, making it inefficient as a combo breaker. (Also, Pyra's disadvantage is even worse than Mythra's.)

Overall, Mythra excels at zone-breaking and pressure, as well as whiff punishing, tech-chasing and stage control thanks to her incredible speed. She also has decent comboing and juggling options as well. However, Mythra's limited raw KO power and damage output more often than not means that she is dependent on Pyra's stronger attacks to KO opponents.

Uniquely for clone characters, Mythra and Pyra act as a transformation character similar to {{SSBU|Pokémon Trainer}}, and to [[Sheik]] and [[Zelda]] in ''Melee'' and ''Brawl''. As typical of both transforming characters and certain pairs of clones, their movesets are designed to complement each other in a speed vs. power dichotomy. Mythra is characterized by an overall extremely fast mobility, and swift but weak attacks that give her a diverse combo game but difficulty in securing KOs, while on the other hand, Pyra has some of the slowest movements in the game, but a longer range on average than Mythra and overwhelming power comparable to that of most super-heavyweight characters.  

While all of their special moves (except for [[Swap]], which is required to switch between the two) are fully unique, the rest of their moves have identical animations, similarly to how they function as different variations of the same Aegis Sword moveset in their game of origin (aside from Blade Specials). In comparison to other clones, they have the same amount of different moves from each other as the full clone {{SSBU|Young Link}} has from {{SSBU|Link}}—with Pyra and Mythra just barely being semi-clones due to most of Young Link's different moves from Link being shared with {{SSBU|Toon Link}}. Additionally, Mythra has a unique ability, [[Foresight]], which acts as a form of dodge leniency, while Pyra has no similar ability of her own.

Overall, Mythra excels at the start of a match and when the player is at a disadvantage due to her superior speed and additional multi-hit moves allowing the player to quickly rack up damage and escape pressure. However, Pyra's superior damage and range, while leading to worse combo potential, allows her to close stocks much earlier and has much more combo enders that Mythra heavily relies on. While both are able to stand on their own in terms of usability, effective use of both in a battle is recommended to unlock their full potential.

*{{change|Mythra's on-screen appearance, idle stance, periodic idle poses, swimming, taunts, victory animations and No Contest animation are different from Pyra's.}}

*{{buff|Mythra's walking (0.92 → 1.42), dashing (1.38 → 2.41), and initial dash (1.69 → 2.45) speeds are faster than those of Pyra.}}

*{{buff|Mythra's air speed (1.1 → 1.22) and air acceleration (additional acceleration: 0.055 → 0.06; total: 0.065 → 0.07) are faster than Pyra's.}}  

*{{buff|Except for throws, all of Mythra's attacks have significantly faster frame data.}}

**{{nerf|The third hit of neutral attack deals much less knockback (71/103 → 66/98), and launches at a higher angle (361° → 60°).}}

**{{nerf|Forward tilt has less knockback scaling (78 → 65), to the point where it cannot KO, even at very high percentages.}}

***{{buff|However, this grants it combo potential until high percentages, though not to the same degree as up tilt or down tilt.}}

**{{change|Forward tilt launches at a different angle (35° → 62°), improving its combo potential when combined with its lower ending lag and reduced knockback, but hindering its utility as a get-off-me move.}}

**{{change|Up tilt deals significantly less knockback (base/scaling: 66/98 → 60/73), to the point where it cannot KO, even at extremely high percentages. However, this gives it combo potential until extremely high percentages.}}

**{{buff|Down tilt deals significantly less knockback, especially when sourspotted (base/scaling: 82/62 → 67/60 (blade) - 60/55 (arm)). When combined with its lower ending lag, this allows it to combo into moves for much longer, with the sourspot starting combos even past [[Sudden Death]] percentages.}}

**{{buff|Dash attack can [[Cross-up|cross up]] shields.}}

**{{nerf|Forward smash deals less knockback (base/scaling 70/76 → 75/65).}}

**{{nerf|Up smash's final hit has altered knockback (base/scaling 85/80(early)-80/75(late) → 75/108).}}

**{{buff| This allows the move to be much more flexible in combos than Pyra’s, as well as landing and crossing up shields.}}

**{{change|Back aerial launches at an higher angle (60° → 72°).}}

**{{nerf|Mythra's down aerial cannot [[meteor smash]], however it sends at a lower angle than the late hit of Pyra's down aerial (270°(clean)/60°(late) → 50°).}}

**{{nerf|Down aerial has much less vertical range, combined with its inability to spike, this makes it a much worse 2-frame move than Pyra’s.}}

*{{buff|Despite having the same range, Mythra's grabs are slightly faster (standing 7-8 → 6-7, FAF 38 → 37; dash 12-13 → 11-12, FAF 45-44; pivot 13-14 → 12-13, FAF 40 → 39).}}

**{{buff|Lightning Buster is faster on startup and charges faster.}}

**{{buff|Lightning Buster has a damaging hitbox on Mythra's sword while the move is being charged.}}

**{{nerf|Mythra cannot move horizontally while performing Lightning Buster on the ground, and she has significantly less control of her aerial drift when performing it in midair.}}

**{{buff|Mythra is overall less vulnerable while using Photon Edge, as its duration is shorter than how long Pyra is rendered incapable of attacking, and Mythra is surrounded by hitboxes during the attack, unlike Pyra. Photon Edge also has larger hitboxes.}}

**{{change|Photon Edge can be used to recover, due to Mythra dashing forward, but when using the move in the air, it puts Mythra into [[special fall]].}}

**{{nerf|Photon Edge has less maximum damage potential and deals less knockback.}}

**{{buff|Both variants are faster (frame 13 → frame 10) and grant Mythra slightly more vertical distance. They are also better for horizontal recovery, as, unlike Pyra, Mythra does not dive downward after the jump.}}

**{{nerf|Any downward projectiles fired using Mythra's up special can be reflected and absorbed.}}

**{{buff|Mythra's spot dodge provides intangibility later; however, Foresight protects her earlier (3-17 → (2-6)7-21).}}

**{{buff|Mythra's rolls provide intangibility later; however, Foresight protects her earlier (forward: 4-15 → (2-6)7-18; back: 5-16 → (2-7)8-19).}}

**{{buff|Mythra's air dodges provide intangibility later; however, Foresight protects her earlier (neutral: 3-30 → (2-5)6-33; directional: 3-21 → (2-5)6-21).}}

So far, Mythra has been slightly nerfed in update {{SSBU|12.0.0}}, with changes that are partially shared with her counterpart Pyra. Shared changes include increased hitstun on the second hit of her neutral attack, as well as reduced pushback against opponents while she is charging her forward smash, with the latter of the two being intended to prevent opposing attacks from whiffing against her during that state. Additionally, Mythra has less intangibility on her directional air dodge, preventing her from performing a completely intangible air dodge toward a ledge while recovering back to the stage; and Lightning Buster no longer has weight-independent knockback, which improves its KO potential against lighter characters, but worsens it against heavier ones.

Overall, these changes are not expected to change Mythra's competitive reception in the long term, as her key strengths and weaknesses remain unaltered.

*Mythra is tied to Pyra as a two-in-one fighter like how [[Sheilda|Princess Zelda and Sheik function in ''Melee'' and ''Brawl'']]. She can switch Pyra into her place by using her down special move, [[Swap]].

*Pyra and Mythra are semi-[[clone]]s of each other, with all of their non-special moves having similar animations but having different frame data, damage, and knockback. Following the archetypical traits of a transforming character, Mythra is the "fast but weak" counterpart of the duo. Also, their remaining special moves are all unique.

*Mythra has a [[fighter ability]] called '''[[Foresight]]'''. It is a [[dodge]] mechanic similar to [[Bat Within]] in both functionality and execution, but differs from Bat Within by also applying a slowdown effect on opponents, similarly to [[Witch Time]].

|neutraldesc=A knifehand strike, followed by an inward slash, followed by an upward slash. Alternatively, the second hit can be followed up by a series of light bursts that conclude with a larger blast that launches opponents. Mythra's fastest move, with the first hit coming out on frame 2. Holding down the button causes her to repeat the first hit.

|utiltdesc=An overhead arcing slash starting from behind. Great combo potential, allowing it to combo into itself and other aerials. However, the attack has a noticeable blind spot directly behind Mythra that cannot hit shorter or low-profile characters at point-blank range behind her.

|dtiltdesc=A kneeling inward slash. Mythra's most reliable combo starter, having extremely small knockback even at high percentages. It can combo into tilts and smash attacks at nearly any percentage, including a KO confirm into up smash at around 130%, or into forward smash to punish ledge regrabs or 2 frames.

|dashdesc=A running upward slash. It is moderately fast at frame 9 and Mythra travels a decent distance using the move, making it great for closing in gaps and punishing landings.

|fsmashdesc=A lunging, two-handed downward slash in front of Mythra. It comes out rather quickly for a smash attack, coming out on frame 14 when uncharged. However, it is also the second weakest forward smash in the game on its own (after {{SSBU|Mega Man}}'s), KOing {{SSBU|Mario}} at around 126% from center stage—and around 94% at the edge—when uncharged. When fully charged, the move can KO from center stage at around 85%, and around 61% at the edge.

|usmashdesc=Throws the Aegis Sword above herself as it spins telekinetically, slashing above herself before picking back the sword and concluding with a twirl. In contrast to Pyra's, it hits multiple times. It has a launcher hit in front of Mythra. It possesses somewhat low ending lag, not enough for it to combo, though it does a great job at setting up into reads or 50/50s into her other attacks and function as a great anti-air due to its long duration. It is Mythra's fastest out of shield option, coming out on frame 9. However, it is the weakest up smash in the game on its own, as it KOs at around 151% uncharged, and around 113% fully charged.

|nairdesc=Telekinetically spins the Aegis Sword in front of herself while facing the screen. In contrast to Pyra's neutral aerial, it hits up to three times, making it functionally more similar to other multi-hit neutral aerials, such as {{SSBU|Piranha Plant}}'s. Much like {{SSBU|Byleth}}'s neutral aerial, it has a landing hitbox that can combo into other moves. It visually resembles Pyra's Flame Nova, but without the fiery effect and visuals.

|grabname= 

|grabdesc=Clinches the opponent, restraining them with telekinesis.

|pummeldesc=Blasts the opponent with light from her hands.

|fthrowdesc=Quickly blasts the opponent away with a light energy blast. It can combo into dash attack or potentially other tilts at very low percentages. At mid-percentages, it starts putting the opponent in a tech situation, allowing for a potential jab lock or tech chase.

|bthrowdesc=Turns around with the opponent and kicks them away. Extremely weak, but can combo into dash attack at low percentages to potentially send the opponent offstage.

|uthrowdesc=Telekinetically throws the opponent upward. Her worst throw, dealing little damage and having no true combo potential other than up air at very low percentages, however the throw is extremely fast, leaving the opponent with little time to react, allowing for a potential juggle scenario.

|dthrowdesc=Places the opponent on the floor and jumps, stabbing them on the way down, akin to fellow ''Xenoblade'' character {{SSBU|Shulk}}'s down throw. Mythra's combo throw, able to lead into aerials and Ray of Punishment/Chroma Dust. Despite being her main combo throw, it is also her strongest throw. Visually, it appears to resemble an abridged version of Pyra's Prominence Revolt, without the fiery effect and visuals.

|nsdesc=Raises the Aegis Sword in the air, charging light energy, before unleashing a series of slashes in front of herself, with the last hit launching the opponent. The raised sword itself can deal little damage while charging the attack if the opponent touches it. The move can be charged to deal more damage, and a fully charged Lightning Buster adds a hit and increases the move's range, while also having a hitbox on the charging blade, similarly to Corrin's forward smash. Unlike Pyra's Flame Nova, its range is primarily centered in front of Mythra, though the move can be reversed by tilting the control stick in the opposite direction. Additionally, if an opponent is behind Mythra and gets hit by the first slash, the opponent will be dragged in front of Mythra and hit by the following slashes. However, it also renders Mythra intangible for a short period of time when she releases the attack. By far Mythra's strongest move in launching power, capable of killing at approximately 50% on a full charge. Hitting an opponent while in the air will stall Mythra's descent.

|ssdesc=Charges forward while slashing six times in front of herself in quick succession, teleporting each time she slashes. It travels a good distance forwards and has great range, making it an effective combat move, but has high ending lag and still renders Mythra vulnerable. The grounded version will stop at an edge provided Mythra is far enough from it, whereas performing the move at an edge will cause her to perform the aerial version (usually resulting in a [[Self-Destruct]]). It can be used in the air, though Mythra will become [[Helpless]] afterwards. The aerial version can be useful for recovery, but should only be used when Mythra has enough height to safely fall back onto the stage after becoming helpless. Similar to Sephiroth's Octaslash, but she can only travel horizontally.

|usdesc=Jumps while performing an uppercutting slash, similar to [[Dolphin Slash]], then fires blasts of light towards the ground that burst on impact, before falling. Its functionality changes based on whether the special move button is tapped or held/pressed continuously. If the special button is tapped once, Mythra performs '''Ray of Punishment''', which fires a single blast of green and yellow light that has more power and bursts to form a larger hitbox but covers a limited area. If the special move is held down or tapped repeatedly, it becomes '''Chroma Dust''', which fires five blasts of cyan and yellow light that have less power, smaller hitboxes, and do not burst, but cover a larger area in a fan pattern. The blasts of light are Mythra's only projectile; they have long range, being able to cover a longer vertical distance than Mythra can cover from the ground, which can be used to hit opponents offstage. Both types of projectiles can be reflected and absorbed. The initial slash has good horizontal range and comes out on frame 10, making the move a useful [[out of shield]] option.

|dsdesc=Transforms into {{SSBU|Pyra}}. Unlike Pokémon Trainer's [[Pokémon Change]], Mythra does not gain frame 1 intangibility, instead becoming intangible starting on frame 6. Also does not stall Mythra/Pyra's fall.

|fsdmg=8% (hit 1),<br>7% (hit 2),<br>2.5%/1.8%/1.4% (hits 3-18),<br>10% (hit 19)

|fsdesc=Rex appears in front of Mythra, who lends him the Aegis Sword before he performs an upward slash. If it hits, a cutscene plays briefly where Rex and Mythra raise the Aegis Sword in the air, sending a column of light to the sky, which glows with light. Afterwards, it cuts back to the stage, where countless beams of light are fired from the sky, hitting opponents multiple times before being launched. Each beam has its own hitbox, which can result in larger opponents taking more damage from the beam barrage. Up to three opponents can be caught by the initial hit, whereas bystanders who didn't get caught by the initial hit can still get hit by the beam barrage. Compared to Pyra's [[Burning Sword]], Sacred Arrow deals more damage, but the final hit is weaker.

MythraOnScreenAppearanceSSBU.gif|Mythra's on-screen appearance

*'''Up taunt:''' Rex appears behind her and pumps his fist up, saying "Come on, Mythra!" (shouting her name excitedly if the game's language is set to Japanese). She waves at Rex once while silently giggling. Rex's animation is similar to the one he does while performing a Blade Special in ''Xenoblade Chronicles 2''.

*'''Side taunt:''' Holds the Aegis Sword in the air while spreading out her arm and conjuring a small burst of light, saying "Prepare yourself." ({{ja|覚悟なさい|Kakugo nasai}}) This is one of her quotes from ''Xenoblade Chronicles 2'', where she could randomly say this before using Photon Edge.

*'''Down taunt:''' Puts the Aegis Sword down while turning her back to the player and looking behind her towards the left, saying "Think you can take me?" ({{ja|本気を見せてあげる|Honki wo misete ageru}}, ''I'll show you my true power.''). This references an infamous battle quote of the Ardainian Soldiers in ''Xenoblade Chronicles 2''. If facing left, the taunt is mirrored.

SSBUMythraIdle1.gif|Mythra's first idle pose

SSBUMythraIdle2.gif|Mythra's second idle pose

!Cheer (English)

|[[File:Pyra & Mythra Cheer French PAL & German SSBU.ogg|center]]||[[File:Pyra & Mythra Cheer Spanish SSBU.ogg|center]]||[[File:Pyra & Mythra Cheer Russian SSBU.ogg|center]]||[[File:Pyra & Mythra Cheer Korean SSBU.ogg|center]]

|Py - ra! -- Myth - ra! || Py - ra! -- Myth - ra! || Py - ra! -- Myth - ra! || Ho - mu - ra! -- Hi - ka - ri!  

*'''Left:''' Holds the Aegis Sword to her side before doing two slashes and says "Called it." ({{ja|当然の結果ね|Touzen no kekka ne}}, ''This is a natural outcome.'') Rex will jump in next to her and hold his fist up, saying "You show 'em, Mythra!" ({{ja|やったね、ヒカリ！|Yatta ne, Hikari!}}) The two slashes that Mythra performs resemble her auto-attack animation in ''Torna ~ The Golden Country''. In team battles, Rex does not appear if the team has three or more characters.

*'''Up:''' Warps around the stage while slashing, similar to Photon Edge, and says "Peak form." ({{ja|最高潮！|Saikouchou!}}) Rex lands from above and holds his fist up.

*'''Right:''' Mythra briefly morphs into Pyra, who does a pose and spins around while morphing back into Mythra, who does a finishing pose by extending the Aegis Sword out. Her pose comes from her [https://images-na.ssl-images-amazon.com/images/I/61l0pJaEooL._AC_SX569_.jpg official artwork and her figurine] with {{SSBU|Pyra}}. They both say "This is the power of the Aegis!" ({{ja|これが、私達の力ね|Korega, watashi tachi no chikara ne}}, ''This is our power!'') in unison, alternating their voices as they swap form.

==In competitive play==

Referencing the duality of Pyra and Mythra, the pair's route features pairs of opponents who are the same or similar. This extends to [[Master Hand]] and [[Crazy Hand]] at the end, who are always fought together, regardless of intensity. The items that spawn are from the franchise the characters are from (or in the case of Round 4, no items).

|6||{{Head|Link|g=SSBU|s=20px}}{{Head|Link|g=SSBU|s=20px|cl=Black}} {{SSBU|Link}} (x2)||[[Fountain of Dreams]] (Ω form)||''{{SSBUMusicLink|The Legend of Zelda|Great Temple / Temple}}''||The stage choice is a reference to the mid-boss room in the Water Temple where Link fights Dark Link in ''The Legend of Zelda: Ocarina of Time''.

Despite their status as downloadable content, Pyra and Mythra do have a legitimate role in [[World of Light]], as they appear in the base game as spirits in [[The Light Realm|the Light Realm]] and [[The Final Battle (World of Light)|the Final Battle]] respectively, meaning that they were vaporized by [[Galeem]]. The Mythra spirit is called as reinforcements by Galeem and is placed directly in front of {{SSBU|Palutena}} and the real {{SSBU|Master Hand}}, making her an obligatory fight to achieve the true ending. Defeating this spirit does not unlock her and Pyra as a playable character; rather, they are unlocked after downloading them and defeating at least 10 other fighters from Galeem's control, just like other DLC characters.

Mythra's fighter spirit can be obtained by completing [[Classic Mode]]; however, Mythra must be the one chosen as the front on the character selection screen to get her spirit. It is also available periodically for purchase in the shop for 500 coins, but only after she has been downloaded. Unlocking her in World of Light allows the player to preview the second spirit below in the Spirit List under the name "Mythra (Fighter)".

SSBU spirit Mythra (Fighter).png|1459. '''''Mythra (Fighter)'''''

==In Spirit battles==

PyraMythra unlock notice SSBU.jpg|Pyra and Mythra's unlock notice after downloading them from the Nintendo eShop.

SSBUWebsitePyra4.jpg|Using Lightning Buster on {{SSBU|Dark Pit}} on [[Pirate Ship]].

**Their [[victory theme]] also has an internal codename, namely "element".

*Mythra's appearance is altered compared to her default appearance in ''Xenoblade Chronicles 2''—she wears black spandex over her legs and back, and the normally open gap in the blouse of her dress is closed up. This design originally came from her spirit in the base game, which was changed due to age ratings—it was later added to ''Xenoblade Chronicles 2'' as the [[xenoserieswiki:Massive Melee Mythra|"Massive Melee Mythra" costume]], which means her design in ''Ultimate'' is based off a costume that was created directly from her appearance in ''Ultimate''.

**Their fighter spirits must separately be obtained, with the Blade chosen as the front on the Classic Mode character selection being the one that gets the spirit. The Pokémon Trainer obtains Squirtle's, Ivysaur's, and Charizard's fighter spirits all at once, while both the male and female Pokémon Trainer spirits must be purchased from the [[shop]].

**Swapping between the two changes the stock icon to the one currently being used, akin to {{SSBM|Zelda}} and {{SSBM|Sheik}} in ''Melee''. With Pokémon Trainer, this can only be done through hacks. However, in [[Squad Strike]], the stock icon always displays the one who started in the match.

**Pyra and Mythra do not appear in Spirit battles as separate fighters, only appearing in the battle for their combined form Pneuma as a single transforming character.

**Pyra and Mythra have separate Final Smashes. The only other transforming characters that had this distinction were Samus and Zero Suit Samus in Brawl, although their Final Smashes were the direct cause of their transformation.

*According to [[Masahiro Sakurai]], the development team considered having [[Rex]] fighting alongside Pyra and Mythra, but this was decided against due to the difficulty the team had with the {{SSBU|Ice Climbers}} in contexts such as [[8-Player Smash]]. Sakurai specifically cited the far more complicated design and abilities of Pyra and Mythra compared to the relatively simple appearance and moveset of the Ice Climbers.<ref>https://www.youtube.com/watch?v=XeDBCgDSiB4</ref> Another issue was getting both characters to move at the same time which the development team found was impossible to do; similarly, it was deemed too difficult to implement Rex as the main fighter with Pyra behind him. This ultimately led to Rex being reduced to a smaller supportive role and Mythra being included along with Pyra with the two being able to [[swap]] instead.<ref>https://www.nintendoenthusiast.com/sakurai-considered-rex-and-pyra-as-a-duo-character-for-super-smash-bros-ultimate/</ref>

*Similarly to fellow newcomers {{SSBU|Chrom}} and {{SSBU|Dark Samus}}, Mythra has a unique animation solely used to transition from Pyra's idle animation to her own one after performing various animations.

*When swapping to Mythra from Pyra after Mythra appears, she has a chance of saying "You're done"; this can be seen as a second reference to the Ardainian Soldiers' battle quotes, the first being her down taunt.

*Mythra, {{SSBU|Steve}} and {{SSBU|Kazuya}} are currently the only DLC fighters in ''Ultimate'' whose down aerials are incapable of [[meteor smash]]ing.

**Mythra is also one of the two only newcomers without a meteor smash that works on aerial opponents in ''Ultimate'', the other being {{SSBU|Daisy}}. Unlike Daisy, Mythra can freely swap to Pyra, whose down aerial is a conventional meteor smash. {{SSBU|Joker}} usually lacks a meteor smash that works on airborne opponents unless he has [[Arsène]] active, in which case his down aerial becomes a conventional meteor smash.

*When KO'd by reaching 0 HP during her final stock in [[Stamina Mode]], Mythra uses her heavy knockback scream rather than her standard KO scream. This trait is shared with {{SSBU|Mario}}, {{SSBU|Dr. Mario}}, and all vocal DLC fighters except for {{SSBU|Joker}} and {{SSBU|Banjo & Kazooie}}.

*Mythra's [[Foresight]] is the first [[counter]]-like mechanic that cannot be activated by a [[special move]], instead being exclusively used via her [[dodge]]s. [[Bat Within]] can also be activated via one, but can also be activated via [[Bayonetta]]'s [[down special]], [[Witch Time]].

*Mythra is one of seven fighters who do not use their dashing animation on the World of Light map, the others being {{SSBU|Meta Knight}}, {{SSBU|Inkling}}, {{SSBU|Hero}}, {{SSBU|Banjo & Kazooie}}, {{SSBU|Sephiroth}}, and Pyra.