Mewtwo Location in Pokémon FireRed & LeafGreen

Mewtwo is a legendary Psychic-type Pokemon obtainable during the post-game story of Pokemon FireRed and LeafGreen. Also known as the Genetic Pokemon, Mewtwo is encountered at theCerulean Cave northwest of Cerulean City, on the second basement floor. The Genetic Pokemon also features the highest overall stats in the game, boasting very high Speed and Special Attack.