Mewtwo

Mewtwo (ミュウツー Myuutsuu) is a Psychic-type Pokémon and is a Legendary Pokémon.

Appearance
Mewtwo is based loosely off of Mew with feline features. Its body is purple and it has three fingers on each hand.

Special Abilities
Mewtwo is highly adept at using its psychic powers, displaying telekinesis and telepathy as well. It is able to fly and erase people's memories as seen in Mewtwo Strikes Back. Mewtwo is a vastly powerful Pokemon, capable of overwhelming most Pokemon.

In Anime
Mewtwo's anime debut was in Battle of the Badge! where Giovanni used it against Gary.

Mewtwo again appeared in It's Mr. Mime Time briefly.

Mewtwo also appeared in Showdown at the Poké-Corral! where it escaped from Giovanni's gym, as seen in the movie.

Mewtwo has been the focus of a few movies, being the main Pokémon in Mewtwo Strikes Back and in Mastermind of Mirage Pokémon, under the control of Dr. Yung. He was also the star of the movie Mewtwo Returns

In Game
Mewtwo appears in many of the games that aren't made directly by the creators of Pokémon themselves, like Super Smash Bros. Melee. It also seems to be one of the most famous Pokémon, appearing in every game and almost every side-game to the Pokémon franchise.

Trivia

 * Although it is a clone of Mew, it comes before Mew in the Pokédex.
 * Mewtwo was created from two of Mew's cells.

Origins
Mewtwo's name comes from the word 'Mew', which is like a cat meowing, and 'two' because it's a clone of Mew. It's name may also come from the word mutant.