| Yo-kai Medallium biography
|| "'Wow! I can't believe it!' She wants nothing more in life than to hear people cry out those words in surprise. She's always busy pulling pranks to cause incredible phenomena."
Unbelievabou (Japanese: アンビリバ坊) is a Rank E Fire-attribute Merican Yo-kai of the Charming tribe.
Unbelievabou evolves into Bad Boya when fused with a Bad Ball.
A light pink-skinned baby humanoid Yo-kai, Unbelievabou has a bronze colored wisp on top of his head as hair and wears a blue mask (or goggles), red cape, nappy, and blue shoes.
Abilities and Powers
Anyone Inspirited by Unbelievabou acts like a baby.
- It is shown in the anime, that if you remove Unbelievabou's mask, he will act like a normal baby.
His name derives from unbelievable (Japanese: アンビリバボー Anbiribaboo) and bou (Japanese: 坊 "baby).