actually I heard almost all sayians can turn into oozaru in this game.
Oh, and you guys are forgetting all about:
-Janemba
-Bojack
-and Evil Buu (the one that ate fat buu and turned into Super Buu) he is in this game, I heard it in an online interview of the creater of the Budokai series.
IT'S ME MEGA_OOZARU I JUST DECIDED TO CHANGE MY NAME BUT NOW I RETURN!