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FD67BFC3-2779-4739-B540-AD26D9AA1E16 This article is a stub and would benefit greatly if it contained more information. Please help the Captain Underpants Wiki by expanding it.

Billy "Super Diaper Baby" Hoskins is the on-and-off alter-ego of Super Diaper Baby. He appears in every Super Diaper Baby book, as well in book 6 and book 11 of the Captain Underpants series. He speaks fluent English, but he doesn't as a superhero. He is notable for defeating Deputy Doo Doo and Rip Van Tinkle.

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