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Slightly Younger Tiny Tippy in his Robo-Boxers on the cover of Book 10

The Radioactive Robo-Boxers (also known as the Robo-Boxers) are a pair of gigantic, robotic boxer-shorts that Slightly Younger Tiny Tippy Tinkletrousers uses. It is a successor to Tippy's Robo-Suit.


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

Slightly Younger Tiny Tippy reaches down to his control panel and presses the "Nuclear Bomb" button. A panel at the rear of the Robo-Boxers opens up as a bomb emerges from the Robo-Boxers. Tiny Tippy presses the button that starts the countdown to doomsday. But then, Crackers and Sulu send themselves and Slightly Younger Tiny Tippy to 13.7 billion years ago. The Nuclear Bomb blows up, destroying Slightly Younger Tiny Tippy, Crackers, and Sulu, but also creating the universe.