Below is a new Pokémon X and Y gameplay trailer revealing another new Pokémon in the new 3DS title.
The name of the new creature is yet to be revealed, but it's clearly a new form for the Mewtwo Pokémon.This is the latest in a line of new Pokémon to be revealed for Pokemon X and Y - the previous ones were Eevee form Ninfia, the three starters Chespin, Fennekin and Froakie, and the two cover legendaries Xerneas and Yveltal.Announced in January, Pokémon X and Y will be the first Pokémon games to receive a simultaneous worldwide launch; Nintendo has confirmed October 2013 Pokémon X and Y release dates.The two games will also be the first core Pokémon titles to feature full 3D gameplay.

http://www.computerandvideogames.com...w-mewtwo-form/