Professor Pippy P. Poopypants may be the greatest scientific genius the world has ever known! Unfortunately, he has such a silly name that nobody takes him seriously! Needless to say, George and Harold poo-poo Poopypants' pride - practically pulverizing it - and Poopypants is preparing to... read more
Preceded by Captain Underpants and the Invasion of the Incredibly Naughty Cafeteria Ladies from Outer Space (and the Subsequent Assault of the Equally Evil Lunchroom Zombie Nerds), and followed by Captain Underpants and the Wrath of the Wicked Wedgie Woman.
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