This page of the Biomutant guide contains a walkthrough of The Bomba-Ball Friend side quest. We have described everything you need to do in order to complete the quest and earn the rewards.
Starting the quest
How to start: Talk to a man in town - Namby.
Reward: 100 XP.
To start the quest, you need to talk to the man at the column. He will mention a bomb that could lead to the end of the world.