[Demonskid]

So Mewtwo New Form or New Pokemon? xD

Details:
This Pokémon was first leaked in a promotional pamphlet of the Present Guide for the movie Extremespeed Genesect: Mewtwo Awakens, replacing Mewtwo on the poster with a caption calling it the Eclair Forme. However, soon afterwards it was revealed by Pokémon Smash, though without saying it is actually a Mewtwo form with the official sites stating it as a new Pokémon. Its details are not currently known

Taken from Serebii