The Bizarre Bout of the Beastly Barfilisk

The Bizarre Bout of the Beastly Barfilisk is the 30th episode of The Epic Tales of Captain Underpants.

Synopsis
George and Harold demand that Mr. Krupp make the camp fun by having fun activities. After the kids do Krupp's chores disguised as items on a scavenger hunt Krupp calls the Buntver {best hunt ever combined}, George and Harold make a comic where Captain Underpants faces a Barfilisk (a bird whose gaze makes its victims barf rainbows). Krupp sends the kids on a wild goose chase for a Barfilisk egg, but George and Harold make a fake, whereas Melvin him creates a live Barfilisk, prompting Captain Underpants to face the Medusa-esque menace

Trivia

 * All the kids (and Mr. Krupp) barf rainbows in the end.
 * MORAL; even a little white lie can lead to big trouble.
 * In one scene, Krupp snapped his fingers while saying "Trademark, The Krupp Group", which did not turn him into Captain Underpants at all.