Mega Mewtwo X is the version exclusive mega-evolved form of Mewtwo and is a PSYCHIC/FIGHTING-type. It is a Mewtwo Evolution that is exclusive to Pokémon X and has a different type to its counterpart in Pokémon Y. It has an increased Attack stat.
This is an Interesting Theory About Charizard's Mega Evolutions. If Mewtwo was artifically created doesn't that mean Mr. Fuji created mega stones as well? But then doesn't that mean Charizards mega stones and any mega stones were artifically created?