Goku's Spirit Bomb is treated as his ultimate move, but in the main timeline, it's seen more failures than successes.

"Mind Trap," the 274th episode of Dragon Ball Z, sees Goku and Vegeta battle the Roundworms inside Buu while trying to track down and rescue their friends. When the father worm emerges, Vegeta is ...

skinny and intelligent Buu capable of complex speech and rationality, even before absorbing Piccolo, Goten and Trunks (as Gotenks), Gohan and countless others before Goku and Vegeta intervened.