But, Newtwo is more powerful, he has no reason to switch back to Mewtwo. You'd be avoiding the smash ball because you don't want to be Mewtwo again. Newtwo goes back to Mewtwo when he has been either defeated or is done fighting. The form and it's power is limited. If you were Super Sonic would you want to change back into Sonic? Of course not, so you'd either have the choice in downgrading or someone Final Smashing you. Besides his power is limited because of rings, just like Mewtwo's power is limited. I've seen Newtwo switch back to Mewtwo because Genesect beat him up.
Actually, Mewtwo Awakened Forme is just as equally strong as Normal Mewtwo, all it seems to get is a considerable speed boost, as most of the discussion regarding Mewtwo in the new movie is the fact that she talks about wanting to go up and above, not to mention it's design is much more aerodynamic, making it look as if it's designed for quicker movement. And Genesect? Beat up Mewtwo? Maybe the new Mewtwo, the old Mewtwo would probably rip its head off...or make it rip its own head off like Huitzil from Darkstalkers.
That's not true. That's like saying Genesect only became popular because of the movie. Of course it increases the popularity, but Lucario was popular to begin with. Although I'm not sure if he would have made it if not for the addition of the movie. My guess however is that he would have made it anyway because otherwise it'd be a full gen 1 roster.
Sakurai has shown he doesn't care about generation representation, especially since Pichu would've never been in the game if he couldn't be an easy to create Pikachu clone. And if it wasn't because of the movie...why does it talk like the one in the movie? Why does it fight NOTHING like a Lucario? (Actually, scratch that, that was probably just poor design choice), why does it always talk about Aura if it's not the one from the movie? Regardless, Lucario owes a majority of his popularity to Smash Bros.