Not so long ago, George and Harold created the greatest super-hero in the history of their school, and brought him to life by mistake. Meet Captain Underpants. Now the boys have accidently created an army of evil, vicious talking toilets.

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.

Ricky Ricotta and his Mighty Robot are best buddies - but with big friends come big responsibilities... Ricky and his Mighty Robot are late for dinner again, and Ricky's parents are not too happy. They think Ricky and his Robot need to learn a lesson, so that night they send the boys to bed without TV. Luckily for Ricky and his Robot, their punishment saves them from falling under the spell of Victor Von Vulture, a villain from the planet Venus....

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.

George and Harold, and their doubles, Yesterday George and Yesterday Harold, have a good thing going. Two of them go to school, while the other two hide in the tree house and play video games all day--then they switch! But when their malicious gym teacher, Mr. Meaner, creates a method of mind control that turns their fellow students into attentive, obedient, perfect children, the future of all humanity will be in their hands!

"The teachers are nice, the cafeteria serves delicious food, and the school principal, Mr. Krupp, thinks George and Harold are hilarious. Something is very, very wrong -- and it gets even wronger when the boys' pet pterodactyl, Crackers, and Sulu the Bionic Hamster are captured by George and Harold's evil-twin look-alikes. Now George and Harold must face their greatest foes yet: THEMSELVES! Can they handle this mess on their own, or will they need...

George and Harold thought they were beyond boogers. Their new pet, Sulu the Bionic Hamster, had defeated the Bionic Booger Boy, and through the wonders of science, Melvin Sneedly had been brought back to normal (well, almost normal). It looked like their last adventure was actually going to have a happy ending... except for one thing (well, three things) -- the Ridiculous Robo-Boogers. Now George, Harold, and their buddies are on the run -- with the...

George, Harold, Captain Underpants, and Sulu the bionic hamster battle the three ridiculous Robo-Boogers in an attempt to turn the Bionic Booger Boy back into Melvin Sneedly.