Captain Underpants and the Revolting Revenge of the Radioactive Robo-Boxers

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Captain Underpants and the Revolting Revenge of the Radioactive Robo-Boxers

This is the tenth Captain Underpants book by Dav Pilkey. It came out on January 15, 2013 (black and white), with a full-color edition released on September 1, 2020.

Plot (easy to understand):
- George and Harold team up with their superhero, Captain Underpants, to face a time-traveling villain named Tippy Tinkletrousers (Professor Poopypants).
- The story jumps through different times. The boys visit the African savanna, meet cavemen, and help them learn to read by creating the world’s first comic book.
- They use silly gadgets, like the Goosy-Grow 4000 and a tampered freeze ray, to stop Tippy, which causes big chaos like an Ice Age.
- The adventure continues into the future, where Mr. Krupp is old and George and Harold become teachers, and they manage to turn Mr. Krupp back into Captain Underpants.
- A final showdown happens when Tiny Tippy and friends threaten the galaxy, but the heroes win.
- Then Melvin Sneedly arrives in a giant Robo-Squid, captures the heroes (and their eggs), and sends them back to the past.