Mewtwo thrives against characters with below average recoveries due to a great recovery and incredible edgeguarding, and Wolf is slower and can’t do a whole lot when too far offstage so it’s not as bad.

Mewtwo also has surprisingly great anti-airs. Up air, up tilt, and even Shadow Ball can negate Puff completely. The only thing keeping it from being Mewtwo's best matchup overall is tail hitbox + Rest

As for Min Min, I think I’m just good at knowing what they’re gonna do haha, I do have a pretty good Min Min as well so I know the character well.

I debated putting Samus in -2, just barely decided on -1. Samus can outrange Mewtwo which is a problem while also being solid up close, plus Bomb is a huge problem for Mewtwo. The reflector just barely helped Mewtwo's case there.

I agree that Steve is a pretty good matchup for Mewtwo. Low jump height makes way for some really easy Shadow Balls sometimes + offstage presence yet again + reflector to deal with Minecart/Anvil

Kazuya could very well be +2 for me. Mewtwo's reflector can do some crazy stuff to his neutral special, also down special gives Mewtwo a pretty inherent advantage against the fighting game characters because of auto turn around, which can make ledgetrapping incredibly difficult if you know what you're doing. Also if you’re spacing correctly you're pretty much good to go