I thought it would be cool if buu had an absorb attack, where he would gain a move from the person he absorbs, (like in supersmash bros with kirby lol. Anyway he would absorb hes enemy like goku for example and that absorb move would be replaced with the kamehameha for example, it would stay like that till he gets killed. Then again i can't remember if it was him or another character in the show that could steal powers.