Benjamin Krupp/Captain Underpants is an Anti-Hero/Deuteragonist in the film with the same name. He's a mean spirited School Principal namely angered by George and Harold's mischief. Later in order to stop him from sending the 2 friends to separate classes, thus would end their friendship, they hypnotise him into believing that he's the Amazing Captain Underpants from the Comics they'd been creating.While as Captain Underpants, he thinks that he's a real superhero with real super powers, and it's up for George and Harold (his sidekicks ) to keep him out of trouble. He becomes Krupp again once having been splashed at with water, and becomes Captain Underpants everytime someone snaps their fingers around him. He eventually gains real super powers after being dropped into Professor Poopypants' Giant Toilet Monster, thanks to the Mutagen that it contains.