How does Mewtwo evolve?

Aaarrrrrgggggghhhhhh!!!!!!!!!!!!!!!!! Mewtwo doesn't evolve!!!!!!!!!!!!!!!!!!!! There is not mewthree, mew doesn't evolve into mewtwo, legendaries dont evolve!!!!!!!!! Try all you want but look on serebii.net and you'll see mewtwo if youu type it in!!!!!!!!!! Yeah!!!!!!!!!