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The Nuclear Bomb is a bomb that was used by Big Tippy Tinkletrousers, Supa-Mega Tippy Tinkletrousers, and Slightly Younger Tiny Tippy Tinkletrousers. It was located in their Robo-Pants. Because of how dangerous they are (the power of the bombs can destroy planets and even galaxies) and that they can't be turned off once activated, the bombs are often used as last resorts.


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

Big Tippy tells his bigger self about Captain Underpants' weakness, but they argue over who should destroy him, resulting in Big Tippy activating the timer of a nuclear bomb on his robot in an attempt to kill Captain Underpants himself. Even though the bombs could not be turned off, he did not care as long as it killed his nemesis. Supa Mega Tippy traveled into the future with the others after kicking Big Tippy to Mexico before the bomb exploded, killing Big Tippy along with the dinosaurs.

Later, George and Harold turn Mr. Krupp and his elderly counterpart into Captain Underpants and Old Captain Underpants respectively, who beat up Slightly Younger Tiny Tippy. When it looks like they would win, Tippy activates his nuclear bomb, which he modified to destroy the entire galaxy. Crackers and Sulu get on board his robot and send it back in time to before the universe existed. In the darkness, the bomb explodes, killing Slightly Younger Tiny Tippy and creating the universe with the Big Bang (or the "Big Ka-Bloosh Theory").