Mewtwo

Mewtwo is a Legendary Psychic-type Pokémon that debuted in the first Pokémon games Pocket Monsters Red and Green Versions. Mewtwo was created artificially based on the genetic code of Mew to be the ultimate battling Pokémon, though it grew too vicious and powerful to be controlled and escaped. Among all the Pokémon that exist, Mewtwo has the most violent nature. As of Pokémon X and Y, Mewtwo can Mega Evolve into either Mega Mewtwo X or Mega Mewtwo Y.

Mewtwo makes a playable appearance as an unlockable fighter in Super Smash Bros. Melee, and as a downloadable fighter in Super Smash Bros. for Nintendo 3DS / Wii U, later appearing in Super Smash Bros. Ultimate as an unlockable fighter, like in Super Smash Bros. Melee.

Background information
The Mewtwo in the Super Smash Bros. series is primarily based on the Mewtwo from Pokémon: The First Movie, in which is was the villain, acting cruel, condescending, and fierce before reforming its ways while also questioning its existence and purpose. In the core series Pokémon games, he is simply destructive and uncontrollable, suggesting that Mewtwo is not entirely evil and that his disposition makes him want to fight and destroy.

Super Smash Bros. Melee
In Super Smash Bros. Melee, Mewtwo is an unlockable character. Mewtwo appears after the player has played a total of twenty hours of Melee matches with one player, ten hours with two players, six hours and forty minutes with three players, and five hours with four players; alternatively, the player can play 700 Melee matches. Mewtwo must then be defeated on Final Destination to be unlocked.

Mewtwo's moves are powerful and it can jump high, but it is a lightweight fighter, making it easier to launch, and it does not move as fast as other characters; while it has a high air speed, Mewtwo has a low fall speed and its running and walking speeds are low. Mewtwo also floats above the ground, making it an easy target to send flying and even KO at low damage percentages, and it also has low traction. Mewtwo also possesses a strong grab, and its throw moves pack a strong punch as well. Its standard special is Shadow Ball, which charges and fires a ball of dark energy. Its side special is Confusion, which flips opponents onto the ground and deflects projectiles (however, the reflected projectile does not damage opponents). Mewtwo's down special is Disable, which dazes any opponents that it is facing when using the move. Finally, its up special is Teleport, which causes Mewtwo to disappear and reappear in a different location.

Mewtwo does not use its hands to hold items, using telekinetic powers instead, making the items hover before it. A similar style is seen when Mewtwo hangs on a cliff or grabs another character. The only time it does touch an item is when using the Parasol. Mewtwo is voiced by Masachika Ichimura in both English and Japanese.

Super Smash Bros. Brawl
Mewtwo makes a cameo appearance in Super Smash Bros. Brawl as a trophy, which can be obtained by completing All-Star Mode on Intense difficulty.

Mewtwo is one of the five characters to not return from Super Smash Bros. Melee as a playable character (the other four being Dr. Mario, Young Link, Pichu, and Roy). Data exists on the disc for Mewtwo as a playable character, however, meaning that at one point in development it may have been a character in the game.

Super Smash Bros. for Nintendo 3DS / Wii U
Originally, Mewtwo only appeared as a collectible trophy in Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U. Additionally, a Mega Mewtwo X & Y trophy appeared exclusively for Super Smash Bros. for Wii U.

During the Super Smash Bros. for Wii U 50-Fact Extravaganza, however, Mewtwo was confirmed to appear as a downloadable fighter for Super Smash Bros. for Nintendo 3DS / Wii U. It is one of three cut characters from Super Smash Bros. Brawl to return, alongside Dr. Mario and Roy (the latter also appearing as a downloadable fighter). Mewtwo was released publicly as paid content at the Nintendo eShop on April 28, 2015, but players who had registered Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U onto their Club Nintendo account before the end of March 31, 2015 received free download codes for Mewtwo on April 15, 2015. Mewtwo's design as a playable character in this game is closer to its current appearance, and it is now voiced by Keiji Fujiwara.

While Mewtwo's moveset is identical to that of its Super Smash Bros. Melee incarnation, it has been given a Final Smash: Psystrike, in which it Mega Evolves into Mega Mewtwo Y and delivers a mental attack. Some of its other moves have also been altered to increase their effectiveness. Mewtwo is also much lighter (only being heavier than Jigglypuff), and moves faster than in Super Smash Bros. Melee, while keeping its attack power. Additionally, Mewtwo still offers one of the highest air speed attributes in the game, losing only to Yoshi and Jigglypuff, but its high air speed is offset by very low air acceleration, and its falling speed is above average as well. For its stage entrance, Mewtwo appears on-stage from a dark energy.

When Mewtwo is downloaded, it can appear in all the solo game modes, except for Events. In All-Star mode, Mewtwo appears between Diddy Kong and Pikachu. However, Mewtwo's inclusion has no effect on any of the challenges.

Super Smash Bros. Ultimate
Mewtwo reappears as an unlockable playable character in Super Smash Bros. Ultimate. Mewtwo's mobility is improved, while its double jump is made faster. Mewtwo's aerial attacks have less landing lag, while its short hop timing is reduced; Mewtwo's smash attacks knock opponents back farther, while some moves deal more damage.

Several of Mewtwo's attacks receive names: its down tilt is Tail Sweep, its forward smash is Shadow Blast, its up smash is Galaxy Force, its down smash is Shadow Bomb, its standard aerial is Body Spark, its forward aerial is Shadow Scratch, its forward throw is Shadow Cannon, and its up throw is Psychic Whirlwind.

Mewtwo also makes an appearance in the World of Light's opening cutscene, where Mewtwo attempts to deflect Galeem's large laser attack by using Confusion along with Zelda, but fails, with both of them getting eliminated by the lasers and turned into dark clones.

Mario Artist: Paint Studio
Artwork of Mewtwo from Pocket Monsters Red and Green Versions can be used as a stamp in Mario Artist: Paint Studio.

Super Mario Maker
Mewtwo is one of the Costume Mario costumes that can be unlocked in Super Mario Maker, either with a Mewtwo amiibo or as a random unlock by completing the 100 Mario Challenge. Mewtwo's sprite is based on its overworld sprite from the Nintendo DS Pokémon games, though like the other Pokémon costumes in the game (excluding the Event Course costumes), Mewtwo does not have any unique sound effects, instead using the default Super Mario Bros. sounds.

Super Smash Bros. for Wii U
The following dialogue also applies to Lucas, Roy, Ryu, Cloud, Corrin, and Bayonetta; all DLC characters, like Mewtwo.


 * Pit: Who is THAT?
 * Palutena: I have no data on this fighter. I can't believe it!
 * Viridi: It must be an intruder from another dimension!
 * Pit: Whoever it is, the goal remains the same: to fight and win!

Super Smash Bros. Ultimate

 * Pit: That's Mewtwo, right?
 * Palutena: National Pokédex number 150. Mewtwo is a legendary Pokémon that was created by resequencing Mew's genes.
 * Viridi: I WILL NEVER FORGIVE THESE HUMANS!
 * Pit: Poor thing. It's a walking science experiment.
 * Palutena: Mewtwo is arguably the most powerful Pokémon in existence. Some people spend their entire lives trying to catch it.
 * Viridi: It's an affront to nature and must be destroyed immediately! Think about it! Every action has a butterfly effect. Who knows what kind of impact it could have on the ecosystem!
 * Pit: Grow a heart, Viridi! It didn't choose to be a freak of nature.
 * Palutena: Feel sorry for it all you want, Pit, but don't underestimate it. Mewtwo's Confusion move can both flip opponents and reflect projectiles.

amiibo

 * Created from modified Mew DNA, Mewtwo was designed to be the ultimate Pokémon. It didn't take on any of Mew's kinder traits and only uses its intelligence to destroy its enemies. Or...so it seems. Perhaps it just feels frightened or even tormented, and that's why it lashes out. Whatever the reason, Mewtwo is not to be messed with.

Super Smash Bros. Ultimate Super Smash Blog bio

 * A Legendary Pokémon known for its technical moves. Use Confusion or Disable as a diversion, then land a Shadow Ball! For its Final Smash, Mewtwo transforms into Mega Mewtwo Y and fires a projectile that freezes and launches the opponent!

Quotes

 * "Watashi wa naze koko ni iru no ka...? (Why am I here...?)" - Super Smash Bros. Melee, Super Smash Bros. for Nintendo 3DS / Wii U, Super Smash Bros. Ultimate
 * "Oroka na...! (Foolish...!)" - Super Smash Bros. Melee, Super Smash Bros. for Nintendo 3DS / Wii U, Super Smash Bros. Ultimate

Trivia

 * Mewtwo was planned to be a playable character in Super Smash Bros., but time constraints posed as an issue, so it was left out.
 * Mewtwo never speaks: when the language is set to English in the NTSC version of Melee, at all in the PAL version of Melee, in Western versions of 3DS/Wii U, and when the game is set to any language other than Japanese or Chinese in Ultimate; it makes only grunts, laughs, and other noises. However, it does speak telepathically on the results screen when the language is set to Japanese (as well as Chinese in Ultimate).
 * When in metal form in Super Smash Bros. Melee, Mewtwo does not make clanking noises, even when it lands; in Super Smash Bros. for Nintendo 3DS / Wii U, while it still does not clank while moving, it does when it lands.
 * The tagline for Mewtwo's Super Smash Bros. for Nintendo 3DS / Wii U trailer, "Mewtwo Strikes Back!", is a reference to one of the titles for Pokémon: The First Movie.
 * Mewtwo's depiction as a lightweight fighter in the Super Smash Bros. series is likely due to its floaty attributes and its tendency to float while moving, which are both mentioned in its trophy descriptions. Its lightweight status may also be a reference to the Pokémon games, where its defenses are on the low side when compared to most other Pokémon who share its base stat total.
 * Mewtwo is thus far the only Legendary Pokémon to be playable in the Super Smash Bros. series.
 * Although Mewtwo moves relatively slow in the Super Smash Bros. series, it actually has a very good speed stat in the Pokémon games.
 * In the Pokémon games, Mewtwo doesn't normally learn Teleport and Shadow Ball, both of which have to be learned through the use of TMs (Technical Machines) Given that Teleport is only a TM in the Generation I titles, Mewtwo can only have Teleport in the Generation II titles by trading it from one of the Generation I games.
 * In the Pokémon games, Mewtwo is said to weight 269 pounds. Despite this, it is lighter than Peach and Zelda in Super Smash Bros. Melee. Additionally, Mewtwo's weight is higher than that of all the playable Pokémon in Super Smash Bros. Brawl (none of whom weight 200 pounds), but some of them are heavier than Mario, who is heavier than Mewtwo in Super Smash Bros. Melee.