- "My name is Bonechill. I'm known somewhat as a celebrity in certain circles of the Underwhere."
- —Bonechill
Bonechill is a powerful demon that was released from his prison in the Underwhere by Count Bleck during the events of Super Paper Mario. Bonechill and his army of Skellobits invaded The Overthere after his escape in search of the pure heart. Mario and the other heroes were able to defeat him, but not until after his army had frozen most of the residents of The Overthere.