Death Battle2010

Wizard:
Buu can mimic any Ki attack after seeing it in action only once. This is how he learned Goku's Kamehameha wave and Supreme Kai's Instantaneous Movement teleport. But his copying prowess goes even further. He can physically absorb other people, transforming his mind and body.

Boomstick:
[seeing Buu absorb Gotenks] That's the most disturbing thing I've ever seen.

Wizard:
Each version of Buu has a different personality, based on whom he's absorbed. Fat Buu is cheerful and childlike, due to absorbing the carefree Grand Supreme Kai. But then there's his original and most dangerous form, Kid Buu.

Boomstick:
He's so tiny! He's like a little kid in MC Hammer pants. This can't seriously be his deadliest form.

Wizard:
Kid Buu is pure rage incarnate. He can get so angry, he's capable of tearing holes in the fabric of reality just by screaming.

Boomstick:
Or, if he's fed up with whatever planet he's on, he'll just blow it to bits with his Planet Burst attack.