Fangbone!
The Swamp of Education / The Ballad of Meh
S1 E5:
After traveling through a magical portal, young barbarian warrior Fangbone ends up in a third-grade class in suburbia. He must prevent Venomous Drool, an evil sorcerer, from being reunited with his big toe. To help him achieve this, the warrior teams up with Bill, a boy whose weirdness is his best weapon, to battle Drool's monster henchmen and other bad guys who want to acquire the toe to be able to use its evil powers.