One of the latest Super Smash Bros. Ultimate blog posts is dedicated to the Legendary Pokémon Mewtwo, who made its Super Smash Bros. debut in Super Smash Bros. Melee. Read on below and check out the following video to learn more about this Pokémon fighter:
A Legendary Pokémon known for its technical moves. Use Confusion or Disable as a diversion, then land a Shadow Ball! For its Final Smash, Mewtwo transforms into Mega Mewtwo Y and fires a projectile that freezes and launches the opponent!
Source: Official Super Smash Bros. blog