Broly is the main villain of Dragon Ball ... His over-confidence gives Super Buu the chance to absorb Gotenks and Piccolo, and to turn the tide of the battle. Hirudengarn is the main villain ...

After the fat Buu expelled evil from himself, it coalesced into a skinny Buu that went onto to absorb the other, forming "Super" Buu, a tall, skinny and intelligent Buu capable of complex speech ...