system
Given the following post, respond as if you're commenting on Reddit:
human
[DBZ] How Did The Kais Defeat Buu In The First Place?

As in, how did they return him to his egg? Did they wait for the wizard to egg him, then they killed the wizard? Cause even fat buu seems to be able to hold himself against all the Kais easily.
gpt
Majin Buu Pure is a force of destruction not unlike Beerus, in that he wakes, destroys some shit, then hibernates. Originally he was actually hibernating but was woken from that sleep cycle by Bibidi, his first 'ruler'. After wreaking havoc all around the galaxy he came to the planet of the Kai's where he killed some, absorbed some, and became the Fat Majin Buu that we saw originally. In this form he was weaker, and more docile, allowing him to be trapped in the little ball, by Bibidi, that we first saw him released from. Bibidi was then killed by the Eastern Surpreme Kai. Thus ending the terror of Buu, for a while.