Captain Underpants the the Revolting Revenge of the Radioactive Robo-Boxers: Summary
Captain Underpants the the Revolting Revenge of the Radioactive Robo-Boxers begins where the last book left off. The series is seemingly over, as Tippy Tinkletrousers arrives from his time travels in a ruined world where Captain Underpants doesn’t exist. Tippy Tinkletrouser is thought to be killed when Zombie Nerd versions of George and Harold step on him. However, as the book begins, it is revealed that the red splotch thought to be the blood of Tippy is actually ketchup from a ketchup packet Tippy used as a distraction. He actually escaped when the Zombie nerd stepped on it.
Realizing what the world is like without Captain Underpants, Tippy Tinkletrousers decides to go back in time and restore the world to its rightful order. He travels back in time five years to when George and Harold are in kindergarten, and when Kipper and his friends are frightened so terribly that they go insane and are taken to a mental institution.
Due to the effects of time travel, Tippy arrives on the the scene as a second Tippy and freezes Kipper and his gang before they can encounter the first Tippy that scared them in the original scene.
Then Tippy goes back to the scene where George and Harold are nearly arrested. George and Harold hide in their time machine with Sulu and Crackers, and accidentally take Captain Underpants with them. This time, the time machine takes them to prehistoric times. Here, there are three Tippys to contend with. Through time travel, the Tiny Tippys stole the Goosy-Grow 4000 and transform one of the Tiny Tippys into a giant Tippy. The Giant Tippy defeats the Tiny Tippy and then tries to use a nuclear bomb to destroy Captain Underpants.
They escape once again in their time machine and this time they are taken to the African Savanna during caveman times. George and Harold make friends with the cavemen locals. They draw them a comic without words because the Cavemen have yet to develop a language and do not understand English. The Cavemen are thrilled with the world’s first comic and set out to help the boys defeat Tippy. The Cavemen set traps for Tippy and defeat him. Tippy uses a freezing weapon to freeze the water causing the Ice Age which in turn causes Crackers to get sick.
The protagonists are transported to the future where they find that Principal Krupp is an old man and they are now teachers. Old Mr. Krupp is transformed into Old Captain Underpants who beats up Tippy with the younger Captain Underpants. Tippy then attempt to use a nuclear bomb to destroy the galaxy. Sulu and Cracker sacrifice themselves, going back in time with Tippy to a time before the universe existed. They are blown up by a giant explosion, the big “Ka-Sploosh”, that causes the universe to form.
George and Harold discover that Crackers has laid eggs, and they commit themselves to caring for them. As the book ends Melvin Sneedly as a giant squid appears and captures them, taking them back to the future.
Captain Underpants the the Revolting Revenge of the Radioactive Robo-Boxers contains crude humor and anti-authority themes. It largely explores themes of good vs. evil and the topic of bullying. Discuss the characters’ behavior with your children and the effects bullying has on them and others.