>>49072840No. I've read that it's because they needed the permission of Takeshi Shudo's (original Pokemon anime writer's) estate since he passed away in 2010, roughly three years before the Genesect film. So they decided to just retcon the fact that there was only supposed to be one Mewtwo for the sake of the film. But they actually did briefly use the original Mewtwo for some shitty filler episode in Journeys, so I assume they've must've recieved permission to use the original Mewtwo's character again.
