Nightmare in Retroville

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The Adventures of Jimmy Neutron: Boy Genius
"Nightmare in Retroville"
Season 2, Episode
Airdate: October 29, 2003
Written by: Steven Banks
Directed by: Mike Gasaway
Episode chronology
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"Operation: Rescue Jet Fusion" "Monster Hunt"
"Nightmare in Retroville" is the 25th episode of The Adventures of Jimmy Neutron: Boy Genius, and also the series' Halloween episode.


Jimmy uses his monster machine to provide his friends' Halloween costumes, but it ends up turning Carl, Sheen, and Hugh into a vampire, a werewolf, and Frankenstein's monster, respectively, and they start spreading chaos throughout Retroville. Jimmy must change them back before the townsfolk kill them.


  • Cindy's costume is "Muffy the Vampire Annihilator", which is an obvious play on Buffy the Vampire Slayer.
  • Ms. Fowl was married to a vampire.
  • Libby can be seen in her normal clothes when she runs behind the windmill.
  • Jimmy is never seen changing back to normal.
  • Hugh forgot that Jimmy has a lab.


  • Jimmy Timmy Power Hour 2
  • The Adventures of Jimmy Neutron: Best of Season 2

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