User blog comment:DerpyDoodle/Mewtwo's Moveset/@comment-25063942-20141029025740

For his Side Special, he could use Psystrike (his signature move introduced in Generation 5), as a medium range attack or something, and they could bring back Confusion's ability to deflect projectile for Psystrike, but this time the deflected projectile can actually do damage back.

Also, let's not forget about possible Custom Moves for Mewtwo. I was thinking about Mewtwo using non-Psychic type moves for his customs, like Electric types or something.