Buu States

Kid Buu This is the original form of Buu. He was created by Babidi purely for destruction. Kid Buu has no concience and is pure evil.

Fat Buu After absorbing Daio Kaioshin Buu turns into Fat Buu. As he has Daio Kaioshin inside him he is not as strong as Kid Buu. This is because Daio Kaioshin holds Buu back, where as Kid Buu had nothing to stop him.Fat Buu liked Mr.Satan's dog, Bee, but when it gets hurt Buu splits into 2 Buu, one goood the other evil.

Super Buu After evil Buu absorbs the good Buu, they become Super Buu. He is still not pure evil as he still has the good Buu inside him. This Buu is very powerful and is very slim and muscular.

Super Gopenks Buu Gotenks goes SS3 and seems to be beating Super Buu, but Gotenks inexperience lets him down and gets aborbed by Buu. Buu then absorbs Piccolo and undergoes another transformation. After a while Gotenks fusion wears of so Buu loses some power and changes again. He looks the same as the gif above, only instead of Gotenks fusion jacket, he wears Piccolo's cape.

Ultimate Buu Gohan turns up and tries to defeat Buu, but soon finds himself being absorbed too. Buu then transforms again into ultimate Buu. He is very powerful and not even Goku and Vegeta can stop him, until they fuse to Vegetto, who easily wins.

Buff Buu Buff Buu is only a temp. form. After Vegetto defeats Buu and pulls everyone out from him. He goes into this form for a while before going back to Kid Buu.