The Really Cool Adventures Of Captain Underpants, Captain Underpants Wiki
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The Really Cool Adventures Of Captain Underpants (not to be confused with the comic book of the same name) is an extremely rare book created by Dav Pilkey and self-published in 1989. It is a prototype of The Adventures of Captain Underpants. 50% of its profits were donated to Goodwill and the United Way. Only one copy still remains in existence and it is unknown where it is. There is a chance this cover could be false.
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The Really Cool Adventures Of Captain Underpants, Captain Underpants Wiki
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Dog Man - Wikiwand
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Captain Underpants Wiki
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Suggestion: What Could Have Been.Literature - TV Tropes Forum
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Captain Underpants and the Terrifying Re-Turn of Tippy
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Captain Underpants: The First Epic Movie (2017) - IMDb
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Mr. Krupp, Captain Underpants Wiki