\Apples
Smash Journeyman
You didn't understand what I said. "Teleport consumes jump/hover, but does not put Mewtwo in special fall."You don't have to hit him to consume his double jump. He already does it himself when he floats. Hitting him causes him to have to recover without his double jump, and he can't hover again until he touches the ground.
I suggest using Up+B, grounded or not, consumes Mewtwo's midair jump/hover. There is no "he already consumes his midair jump when he floats", he just can't do either. I think you're making this more complicated than it is...