*you're walking through the forest, when you see an explosion in the distance. Once you get to its origin, you see a lab that had turned into nothing but rubble. Above the rubble, you see a mewtwo. It looks different than normal, it's not a shiny, since it's tail isn't green. It looks over at you with a hateful expression.

(Mewtwo): "state your purpose. Why are you here?"

it's getting into a defensive position, as if it's ready for you to attack it.