Kruppy the Kid

"I'm the guy who's gonna fire your hiney if you don't get me my coffee . . . NOW!!!!"

- Kruppy the Kid

Kruppy the Kid is Benjamin Krupp trapped in Melvin Sneedly's body. He appears in Captain Underpants and the Big Bad Battle of the Bionic Booger Boy - Part 1: The Night of the Nasty Nostril Nuggets and Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy - Part 2: The Revenge of the Ridiculous Robo-Boogers.

He is voiced by Len Forgione in the Sound-O-Rama Audiobooks.

Captain Underpants and the Big Bad Battle of the Bionic Booger Boy - Part 1: The Night of the Nasty Nostril Nuggets
Melvin's parents arrive at the scene with the Combine-O-Tron 2000. Mr. Sneedly switches the batteries of the Combine-O-Tron 2000 around and separates the robot and snot from Melvin. However, Melvin is partially fused with Mr. Krupp. They are unfused by a second blast. However, the two begin acting strangely. Mr. Krupp says that George and Harold are immature, and Melvin yells that he will punish George and Harold. The robotic snot components come to life as the Robo-Boogers, destroy the Combine-O-Tron 2000, and chase after George, Harold, Mr. Krupp, Melvin, and Sulu.

Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy - Part 2: The Revenge of the Ridiculous Robo-Boogers
The Robo-Boogers are still chasing the five. Sulu saves them, swallowing the Robo-Boogers and spitting them out to Uranus. Mr. Krupp and Melvin continue to act weird. George and Harold realize that as an unwanted side-effect, Mr. Krupp and Melvin's brains were switched around. Melvin (nicknamed Mr. Melvin, as he is in Mr. Krupp's body), explains that it will take 6 months to build a new Combine-O-Tron 2000. George suggests that Melvin instead builds a time machine, which will take only a day or two, and take the Combine-O-Tron before it gets destroyed.

Melvin takes credit for this idea, but snaps his fingers, causing Kruppy the Kid (Mr. Krupp in Melvin's body) to turn into Captain Underpants. George and Harold try to stop this, but they are too late, and Mr. Melvin witnesses Captain Underpants fly out the window. Realizing that their principal is Captain Underpants,

Atfer Mr. Melvin asks Captain Underpants to come in for a "photo", and the two are returned to their original bodies.