Ricky Ricotta, a small mouse, is being bullied at school, but when he rescues a powerful robot from its evil creator, he acquires a friend and protector--and saves the city from Dr. Stinky.

George and Harold hypnotize their principal who, believing he is the superhero Captain Underpants, leads them to the lair of the nefarious Dr. Diaper. They must then defeat his evil robot henchmen.

A small mouse and his best friend, a giant flying robot, attempt to save the Earth when an evil Martian monkey and his mechanical creations attack.

Ricky Ricotta, his Mighty Robot, cousin Lucy, and some friends set out to save mousekind from Stupid Stinkbugs from Saturn, with a little help from some special gum and taffy.

A small mouse named Ricky Ricotta and his best friend, a giant flying robot, save the world from Victor Von Vulture and his vicious Voodoo Vultures from Venus.

When Professor Pippy P. Poopypants comes to Jerome Horwitz Elementary School to teach science, and he goes off the deep end because students make fun of his name, only Captain Underpants can save the school from the professor's perilous plot.

"Petey the Cat is out of jail, and he has a brand-new lease on life his Petey's reevaluated what matters most, Li'l Petey is struggling to find the good in the world. Can Petey and Dog Man stop fighting like cats and dogs long enough to put their paws together and work as a team? They need each other now more than ever -- Li'l Petey (and the world) is counting on them!"--Publisher.

When Professor Pippy P. Poopypants comes to Jerome Horwitz Elementary School to teach science, and he goes off the deep end because students make fun of his name, only Captain Underpants can save the school from the professor's perilous plot.