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Principal Benjamin "Benny" Krupp, better known as Old Mr. Krupp and Old Captain Underpants to differentiate him from his present counterpart, is a supporting character in Captain Underpants and the Revolting Revenge of the Radioactive Robo-Boxers, the tenth installment of the Captain Underpants book series.

He is the thirty year older counterpart of Captain Underpants. He is voiced by Len Forgione in the Sound-O-Rama Audiobooks.

History[]

He is only in the tenth book, when George and Harold learn that the yelling instructors are actually themselves in the future when Old Mr. Krupp shows up and orders the teachers to get the pupils into class. The older George and Harold explain that their commitment to pay more attention in class and begin behaving like adults is what prompted them to start acting very much like the teachers they were used to.

Immediately after their first vow is broken, George and Harold make a new one promising to always be true to who they are. The adult George and Harold vanish as a result, and it is unclear whether they may return in the future (but with altered personalities).

To prevent younger Mr. Krupp (dressed as Captain Underpants) from being killed by Slightly Younger Tiny Tippy, George and Harold transform Old Mr. Krupp into Old Captain Underpants to save younger Nasty Mr. Krupp "dressed as Captain Underpants from being beaten up by Slightly Younger Tiny Tippy" As soon as George and Harold snap wounded nasty Mr. Krupp into Captain Underpants for the last time, Old Captain Underpants with his younger self team up and fight Slightly Younger Tiny Tippy, together and win.

After Slightly Younger Tiny Tippy dies in another time line, Old Captain Underpants is ordered to gather his clothes and fly back into his office, get dressed, and wash his face with water, turning him back into his nasty old self again.

Appearance[]

As Old Mr. Krupp, he has a beard, wears a collar t-shirt with a tie and slacks, along with a toupee. Once he becomes Old Captain Underpants, he strips to his underpants and removes his toupee, and dons a red cape.

Gallery[]

Navigation[]

           Captain underpants logo Heroes

Students
George Beard (Yesterday, Old) | Harold Hutchins (Yesterday, Old) | Melvin Sneedly (Mel-evator) | The M.I.S.F.A.R.T.S (George Beard, Harold Hutchins, Erica Wang (Aternate Timeline, Adult), Dressy Killman, Bo Hweemuth, Steve "Gooch" Yamaguchi, Stanley Peet, Jessica Gordon, Sophie One, Other Sophie)

Teachers
Benjamin Krupp (Old, Alternate Timeline) | Kenny Brian Meaner | Toilette Ree | Jerry Citizen

Books
Sulu | Crackers | Tony, Orlando and Dawn | Great-Granny Girdle and Boxer Boy | The Incredible Robo-Plunger | Cavemen | Gaylord Sneedly | Cindy Sneedly

The Epic Tales of Captain Underpants
Diddlysaurus | The Society of Robes | Cash Networth | Bigfoot | Creeply Rattlechains | Viper Chai | Moxie Swaggerman | Dr. Shifty Fitzgibbons | Cosmicops | Livmen | Santa Claus | The Tolietastics

Ook and Gluk
Ook Shadowski and Gluk Jones | Lily | Master Wong | Lan Wong | Mog-Mog

See Also
Dog Man Heroes

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