>>57976769Most of that "mentality" was also invented by the dub. In the JP version Mewtwo's plan was apparently just to lure in a bunch of trainers with strong Pokémon, clone them to create a family for himself, then erase the trainers' memories of all this and go to live in seclusion.
He wasn't summoning a storm to destroy the world, just to keep anyone from leaving his island until he was done. He also never commanded the cloned Pokémon to attack anyone, they just escaped and went on a rampage after Ash/Satoshi broke the cloning machine.