And even that one move could be changed, at least visually. For example, Lucario could keep charging (and shoot) Aura Sphere with both hands, whereas Mewtwo could pull one hand back, charge SB, then throw it with one hand like he did constantly in the movie.I don't think that his moveset should be redone, just built upon. Project M did a good job of showing us what Mewtwo would look like with touch ups and new addons, but the old model is best model. Lucario just has one move, like someone already said, that really replicates Mewtwo, so having both pokemon revamped and polarized toward their tendencies, one as a floaty tank, and the other as a martial arts master. That seems to work in PM.
Site note,