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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.


The Purple Dragon Sing-A-Long Friends (formerly known as The Knuckleheads) is Jerome Horwitz Elementary School's football team. Originally, Mr. Krupp put the video for them to watch, thinking it was the surveillance footage of George and Harold sabotaging the football game. The two, however, switched the video while hypnotizing the principal and replaced it with Harold's sister's Boomer the Purple Dragon Sing-along-video. The players enjoyed the video so much that they changed the name of their team, although the fans weren't too thrilled with the change.

They first appear in The Adventures of Captain Underpants, where they prance around hand in hand. They reappear in Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy - Part 2: The Revenge of the Ridiculous Robo-Boogers when Captain Kruppy the Underpants Kid ruins their biggest game of the year. They were also mentioned in The Epic Tales of Captain Underpants.

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