Professor Poopypants

Professor Pippy P. (Pee-Wee) Poopypants is the most recurring villain in the Captain Underpants book series, which makes him the lead antagonist of Captain Underpants: The First Epic Movie.

Trivia

 * In the books, his middle name is Pee-Wee, but in the movie, it's changed to Diarrheastein.