General Rilldo should be playable or at the very least able to be fought in more Dragon Ball games.
He can turns things into metal and that metal drains ki. He can basically "metalbend" and morph the land into his weapon. And as Meta Rilldo can even turn into liquid metal himself and make metal tsunamis! He even beat Goku and Pan into metal bricks
Like he's basically an android version of Majin Buu








