Bonechill

From Paper Mario Wiki

Bonechill is the third to last boss in Super Paper Mario. He can attack using his icy breath that can form icicles on the ceiling, or firing ice bullets from his cannon he sits upon. His max HP of 80 and has an attack of 4 damage. He was stuck in a prison in the Underwhere along with his Skellobit army. Count Bleck set him free to destroy Mario, and steal Luvbi (who is actually a Pure Heart) He fails (of course) and shatters into bits. It is told that he was once a Nimbi, and it is also indicated by his multiple wings on his back.