Grumpy Young Men

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The Adventures of Jimmy Neutron: Boy Genius
"Grumpy Young Men"
Season 2, Episode 22B
Grumpy Young Men (Title Card)
Episode chronology
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"The Retroville 9" "Operation: Rescue Jet Fusion"
Grumpy Young Men is the second segment of the 22nd episode of The Adventures of Jimmy Neutron: Boy Genius


To get a rated M video game, Jimmy, Carl and Sheen use Jimmy's new age accelerator to make themselves into 18-year-old's. Unfortunately, Jimmy's time barrier source causes them to turn into old men. They must find some titanium to change back to normal or else they'll turn into dust.


  • When they are old, Jimmy, Carl and Sheen will get Alzheimer's.
  • This is the second time Carl turns old. The first was in Granny Baby.

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