Eddie Neutron, better known as Baby Eddie, is Jimmy's evil 17½-month-old cousin and Newt and Kari's son with a grown man's voice.


Eddie is mean, evil, ruthless, selfish, sadistic and bratty. He believes he is a lot smarter than Jimmy (which is somewhat accurate since he is a baby). When there are adults around, just when he talks in his normal voice, he then suddenly talks in a baby voice and says, "Goo", feigning innocence. He was plotting to do away with the entire clan so he could get Great-Aunt Amanda's inheritance. 

Despite his intelligence and adult voice, he is still as mentally immature as he is physically. He cries when he is upset, he threw a fit when Jimmy destroyed his rattle, demands his cup, and always demands a diaper change from peers and others. He always smells and has a full diaper on.


  • Eddie's attitude and behavior is quite similar to Chucky from the Child’s Play franchise.
  • Since he is trapped in the dinosaur times, it is most likely that he was either eaten by one of the dinosaurs or has managed to scare them off with a 5 day old poopy diaper.
  • He flirted with Beautiful Gorgeous in "The League of Villains," but she never returned the feelings.
  • Eddie is similar in terms of behavior to Stewie Griffin from Family Guy as both are evil, are a year old, and have the ability to talk and walk.
  • He resembles Granny Neutron as an infant, as seen in "Granny Baby".
  • Eddie is the only villain to be related to any of the main characters. 
  • After finding out Eddie was evil, Great-Aunt Amanda calls him “a bad seed”.  



Main Characters: Jimmy Neutron | Carl Wheezer | Sheen Estevez | Cindy Vortex | Libby Folfax | Goddard | Hugh Neutron | Judy Neutron

Recurring Characters: Nick Dean | Brittany Tenelli | Betty Quinlan | Ms. Fowl | Sam Melvick | Bolbi Stroganovsky

Villains: King Goobot V | Professor Calamitous | Eustace Strych | Beautiful Gorgeous | Meldar Prime | Evil Jimmy | The Junkman | Zix, Travoltron and Tee | Baby Eddie | Gortox the Irritable | Dr. Sydney Moist

Community content is available under CC-BY-SA unless otherwise noted.