This chapter of the guide to Dragon Ball Z: Kakarot has a walkthrough for Pure Pair side quest.
Time frame: From Majin Buu Reborn - Episode 8: Finale to No time limit
Reward: 281,651 EXP, 15x D Medal, Card 087, Card 094
Where to start: Far Southern Islands Area, as Goku.
To start this mission, you must go to Far Southern Islands Area. Baba is waiting for you there - talk to the woman to get a new substory.
Your task is to find and defeat Kid Buu. This enemy can have a much higher level than yours.
We recommend assembling a strong team and preparing healing items.