General First Observations of the Mewtwo Matchup for Pac-man
(Should be taken lightly and will likely change over time)
Mewtwo's moveset is a hodge podge of moves that are very similar to other characters. Or Sakurai used them for those characters, but whatevas.
He has a slow Mario Cape
He has a slow Lucario Aura Sphere
He has a slow ZSS Dsmash (trend, seriously)
He has a slow Mario Smash attack
He has a faster DK Downtilt
He has a ok poke with Filt
He has Marth like aerial attacks that are not disjointed
His grab is actually pretty legit, similar to melee.
So what does this mean for Pac-man?
Overall? I feel this matchup at the worst is even for Pac-man, but tentatively, I lean it being 55:45 or 60:40 for Pac-man
Pac-man, really is not threatened by Mewtwo's moveset. I feel that while confusion is potent as a reflect, it is very slow in comparison to Cape, it also is not as dangerous offstage because it does not reverse controls/moment. You could say it would be comparable to falco's reflector, but I would disagree, because Falco's has knockback.
Outside of Confusion, m2 does not really have the toolset to really directly influence Pac-man's Zoning. He has good aerials that help keep Pac-man out, but he is much too large and floatly to really do that reliably.
His tilt game is strong, but his Smash attacks are slow and easily avoided. Pac-man is also shorter then M2, making disable a lucky hit at best. (I think we can just crouch avoid it, but I have not yet tested this)
He is susceptible to Retreating SH fairs because of his height. He is also able to be grabbed while on the top of a hydrant (I love doing this, its so funny)
Overall, Mewtwo's strongest method to attack is grab, which Pac-man can, and should, avoid with ease.