The user rolls themselves up into a ball and bounces away as they retreat.
Video Game Appearances
Buu Buu Ball was named and first appeared in Dragon Ball Xenoverse as Majin Buu (Small)'s Evasive Skill which can also be obtained by the Majin Future Warrior. It is exclusive to Majin characters.
In Dragon Ball Xenoverse 2, it returns as an Evasive Skill used by Majin Buu (Small) and can be obtained by the Future Warrior as a reward in Parallel Quest 88: "Evil Seeks Dragon Balls Yet Again!". It remains exclusive to Majin characters.