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The All-New Captain Underpants Extra-Crunchy Book o' Fun 2 is a book that was released in October 2, 2002. This book features an all-new comic: "Night of the Terror of the Revenge of the Curse of the Bride of Hairy Potty", guest starring Super Diaper Baby and Diaper Dog.

Also, at the end of the comic, there is a sneak peek at a comic about Hairy Potty and Mrs. Potty's son. This comic may be in another possible Book O' Fun.