Majin Boo

Boo is introduced in the series as an innocent looking, pudgy, pink genie-like creature. Later in the series, it is revealed that Boo's original form is a more sleek child form ("The Boo of Pure Evil"), however his nature and form had been altered after he'd assimilated the gentle, pudgy god (Dai Kaioshin) into his body. Boo's creator, a wizard named Bibbidi, had used Boo to wage war on the Kaioshin. Boo managed to assimilate two of the four Kaioshin, the second being the one who altered his nature to become innoce…