Super Buu
Super Buu is supposed to be the strongest of all the Buu Forms. I dont know if he is but in the Power Levels section, he isnt. He was realeased from Majin Buu's body in a rage of anger. Super Buu is Majin Buu's anger that was subdued by Mr. Satan. Mr. Satan was a vital part of Super Buu's existance. Think about it, If Mr.Satan wasn't shot, Majin Buu would not have gotten angry and realesed Super Buu.

Evil Buu
Evil Buu is the form of Buu that comes out of Majin Buu before Super Buu is created. This is ALL of Majin Buu's anger and hate. Evil buu fights good Buu and kicks his ass.

Majin Buu
Majin Buu's another form of the all-mighty Buu. He is the original form, the first to show up. He is probably the strongest of all the Buu's as he was virtually undefeated when we saw him. He is also the fat one out of the three forms. Majin Buu is sometimes called Fat Buu. He was one to release Super Buu after his friend Mr. Satan was shot. At first, Majin Buu was originaly evil but switched side due to Mr. Satan.

Kid Buu
This is actually Super Buu in a smaller form. He is mighty strong and he is pure evil. He beats up on vegeta in this form. This Buu is one cool kid!

Chocolate Buu
Chocolate Buu is probobly the funniest Buu out there. His fighting style is boxing and his favorite food is (as if you didn't know) chocolate. His boxing skills are amazing. Not even SSJ Goku could match it. Goku got pummeled by Chocolate Buu! He is a shining example of how strong the Buu's really are!