Oh and did you know that there's what seems to be a new Mewtwo or pre-evolution of Mewtwo? Rumor has it that it's the evolution of Mewtwo called Mewthree:

Actually, is a whole new pokemon. Since mewtwo is not a natural pokemon, it can't evolve nor it have a pre-evolution.

i just realized that this morning a friend of mine went on a rant about x and y but rumor has it that it was made from Mew again and is called Mewthree i'm a total Pokemon fan so i try to keep posted when it comes to this