Bobo was an inmate who grew to colossal size after he put his hand in a small puddle of growth serum spilled by Jared in Terrorarium. He also appeared in the chaotic part at the end of Time-Police Part 2, where he eats dozens of smaller inmates in one mouthful. He has the letters of his name, BOBO tatooed on each knuckle on his right hand. Bobo later appears in super storm were he won the tug of war.
Oddly Bobo does not appear in season 2.