Mega mewtwo X

The new Mega Evolution of Mewtwo is exclusive to X and is called Mega Mewtwo X. It is Psychic/Fighting-type and has the ability Steadfast. The previous Mega Mewtwo is Mega Mewtwo Y and is exclusive to Pokémon Y. They use the items Mewtwonite X & Mewtwonite Y to Mega evolve.