Unfinished, but there
Mewtwo’s new incarnation in Super Smash Bros.might be on the juice, but he severely lacks one major feature — custom moves. For whatever reason they are not included at the launch of the character, and Nintendo has been pretty quiet on providing a reason why.
Thanks to this video from YouTuber Mankalor, it looks like Mewtwo doeshave custom moves, they just aren’t fully implemented and require a bit of trickery (a Mii workaround) to access on the 3DS.
Custom moves would make the character inherently more interesting and viable at tournaments that allow them, but I’m perfectly fine with using him as-is.