The Epic Tales of Captain Underpants S02E07 - Captain Underpants and the Bizarre Blitzkrieg of the Bothersome Butt-erflies
Summary:
The boys use Melvin's new animal hybrid invention to make a creature that's a cross between a butt and a fly. But these butt-erflies are real monsters!
The Epic Tales of Captain Underpants S2E7 Screenshot