Mewtwo

Mewtwo is a playable character in Super Smash Bros. Melee. In the Pokémon series Mewtwo is an artificial Legendary Pokémon based on the genetic code of the Legendary Pokémon Mew. Due to constant experimentation, he went out of control and escaped. Mewtwo is commonly called the "Dark Side of Pokémon", which makes him one of the three evil playable characters in Melee. The other two are Bowser and Ganondorf, of the Mario series and The Legend of Zelda series, respectively.

Super Smash Bros. Series
Mewtwo was meant to be a playable character in Super Smash Bros., but time constraints posed as an issue, so he was left out.

In Super Smash Bros. Melee Mewtwo is an unlockable character. Mewtwo appears after the player has played a total of 20 hours in VS matches and then battles the match's winner. If the player defeats Mewtwo, then he is unlocked.

Mewtwo is a somewhat heavy character, but has a high air jump (judging that its a Psychic Pokémon). His attacks are powerful, but he is not very fast. It also floats above the ground, making it an easy target to be sent flying, and has low traction. Although these attributes make it difficult to control, he is incredibly powerful once used right.

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

Mewtwo is one of the five characters who does not return in Super Smash Bros. Brawl as a playable character. He does, however, have the appearance of a trophy which can be obtained by completing All-Star Mode on Intense difficulty.

Shadow Ball
Shadow Ball is a special move used by Mewtwo in the game Super Smash Bros. Melee. It is executed simply by pressing the B button. The Shadow Ball is in a way similar to Samus's Charge Shot. If done correctly, Mewtwo should start charging up a ball of dark matter in his hands. The player could hold the B button to charge it even more. One could even walk with it. Once charged enough, the player must either let go of the button (if charging it up), or press the B button (if walking around with it) in order to shoot it at the opponent. The attack is very powerful once charged up to the most, but since it is relatively slow while hovering, there is a good chance Mewtwo will miss the foe. At full power, it cause Mewtwo to go back a few feet from the shockwave. Kirby can also use Shadow Ball if he sucks up Mewtwo's power.

Lucario possesses a similar move called the Aura Sphere in ''Super Smash Bros. Brawl.

Confusion
Confusion is a move that only Mewtwo can use in the game Super Smash Bros. Melee. It is his side Special Move. If done correctly, Mewtwo will use psychic energy to flip any player in front of him. This can be used to stop the opponent in his/her tracks if he/she's trying to attack, or it could be used to distract the opponent so that Mewtwo can escape. Confusion can also be used to block projectiles, like Link's Bow, or Mario's Fireball. It can be treated as a replacement for the shield. Confusion is in fact one of Mewtwo's attacks from the Pokémon series.

Teleport
Teleport is one of Mewtwo's special moves that he can use in Super Smash Bros. Melee. In order to activate it, the player must press Up + B. Mewtwo will continue to use Psychic abilities to teleport him upwards into the sky. Once done, he will drop down onto the field. Teleport is Mewtwo's third jump. The move is also good at escaping from a barrage of opponents. The attack doesn't do any damage, however, and is merely a recovery move.

Disable
Disable is one of Mewtwo's moves in Super Smash Bros. Melee. It is executed by pressing Down + B. Once performed correctly, it will make sparks come out of Mewtwo's head, and if they hit anybody, then the character is immobile. This leaves them open for attack. However, it will eventually lost effect after a while. The opponent can also snap out of the Disable if they are hit once. It Mewtwo does this move again if they are immobile, then they will be sent into flying into the air, with only one damage made to them. The attack can also be used to help Mewtwo run away.

Trivia

 * Mewtwo is the only non-clone to not be included in Super Smash Bros. Brawl.
 * Mewtwo's Shadow Ball is almost the same as Lucario's Aura Sphere.