A Final Showdown at the Summit! Face-Off in the World of the Kais!

"I didn't want to say anything before, but I actually could've taken out the chubby Buu last time I went Super Saiyan 3 on him! But I held back to give the boys a chance to finish him off - so they'd be prepared for the future...Aw, come on! I was in the middle of talking, you jerk!" — Super Saiyan Goku realizing Vegeta flew off in the middle of his explanation

A Final Showdown at the Summit! Face-Off in the World of the Kais!
Japanese Name	最さい後ごの頂ちょう上じょう決けっ戦せん！界かい王おう神しん界かいで決けっ着ちゃくだ！！
Romaji name	Saigo no Chōjō Kessen! Kaiōshin-kai de Ketchaku da!!
Literal Name	The Battle's Conclusive Peak! It's Settled in the Kaiōshin Realm!!
Series	Dragon Ball Z Kai
Saga	Kid Buu Saga
Episode #	158 (DBK 151)
Uncut counterpart:	True Saiyans Fight Alone Battle for the Universe Begins
Chapter counterpart	Battle for the Universe
Japanese airdate	May 3, 2015
English airdate	April 14, 2018
Previous episode	Earth Destroyed! The Initial Buu's Nefarious Strike
Next episode	Hang In There, Kakarot! You Are No. 1!

"A Final Showdown at the Summit! Face-Off in the World of the Kais!" (最さい後ごの頂ちょう上じょう決けっ戦せん！界かい王おう神しん界かいで決けっ着ちゃくだ！！, Saigo no Chōjō Kessen! Kaiōshin-kai de Ketchaku da!!, lit. "The Battle's Conclusive Peak! It's Settled in the Kaiōshin Realm!!") is the one hundred fifty first episode in Japan and the one hundred fifty-eighth episode internationally of Dragon Ball Z Kai. This episode first aired in Japan on May 3, 2015. Its original American airdate was April 14, 2018.

Summary

Yamcha and Krillin vs. Kid Buu

Kid Buu is blown to smithereens by the Planet Burst's explosion, but he quickly regenerates after the destruction of Earth and goes on a murderous rampage across the universe. He goes from planet to planet, looking for Goku and Vegeta, and destroys each planet when he doesn't find them. He goes to the Grand Kai's Planet, and starts to toy with everyone there.

When he becomes bored, Buu creates an energy ball, intending to destroy the Grand Kai's Planet. Kibito Kai offers Goku and Vegeta his Potara earrings, but they both refuse. They then raise their power levels so that Buu will know where to find them. Buu abandons his attempt to destroy the Grand Kai's Planet and teleports to the Sacred World of the Kai. Kibito Kai transports himself, Dende and Old Kai to a distant planet so they will be out of Goku and Vegeta's way, along with a Crystal Ball that allows them to watch the battle. Unfortunately, they forget to take Mr. Satan and Bee along. Goku and Vegeta play Rock-Paper-Scissors to decide who will fight first, and Goku wins. He powers up to Super Saiyan 2, and starts beating up Buu. Goku blasts him apart, but he easily regenerates. Buu creates another massive energy ball and throws it down at the planet. Goku is able to deflect it, but Buu guides the ball back around and into the planet. Powerful shock waves rock the entire planet, disfiguring its shape and leaving the surface rugged and uneven. Goku, realizing that Buu is stronger than he thought, powers up to Super Saiyan 3.