So how'd I do at trolling y'all? I used to do it a lot 2 years ago and thought I'd give it a go (I decided to change Abadango to Avacado for lulz truthfully)
What I ACTUALLY think of Mewtwo:
In terms of technicality, he is in the middle. He has a learning curve, but nowhere near the largest. Abadango has shown some very impressive things with the character.
Fair as
Lorde
described is an excellent move. Disable was seen as meh at first, but the Footstool-Disable has proved an interesting technique indeed. He does have poor endurance, but definitely not as bad as Jigglypuff. Mewtwo also gets actual benefits from Rage. He has great mobility.
So I wouldn't say he's easy or hard to play.