In this fourth installment of the Captain Underpants series, the bumbling genius Professor Pippy P. Poopypants is tired of being ridiculed for his name. Armed with his nefarious inventions like the Shrinky‑Pig 2000, he sets out to shrink—or control—the world. It’s up to the world’s only superhero with “Wedgie Power” (Captain Underpants) to save the day in this hilariously absurd adventure.