Goku and Vegeta suddenly appeared in front of you, asking you for assistance.

Goku: Yo, we kinda need some help with Buu, he’s a bit stronger than we expected, hehe..

Vegeta: I hate to admit it, but Buu is definitely more powerful than both me and Kakarot, and it pains me to admit this.. but we need help.

You know you can’t fight Buu head-on, but you decide to give them the Potara and tell them how it works, and the two use it correctly, creating Vegito.

Vegito: ALRIGHT! Since we are the fusion between Vegeta and Kakarot, I guess that makes me Vegito. I’m off to fight Buu, don’t die and don’t get into trouble. Buu will be gone before you can even say “Yosha.”

He then flies off to Buu’s location, before you decide to follow and watch the fight and for support in case things go south.