Jet Fusion: a secret agent aided by Jimmy in the fight against Professor Calamitous and his daughter Beautiful Gorgeous. He is first seen in the episode "Operation: Rescue Jet Fusion" he is voiced by actor Christian Slater.
Butch Pakovski: Butch is the slightly slack-jawed, unintelligent bully of Lindbergh Elementary School who doesn't have many friends at all (except his younger brother-name unknown). He is mostly seen bullying Oleander and Carl. He is voiced by Rob Paulsen.
Brittany: Brittany is in Jimmy's class. She can dance well, as she is seen dancing with Cindy and Libby as a third partner. She bribed Libby to be her science partner with a music CD in Raise the Oozy Scab. She is voiced by Candi Milo.
Arnie: Arnie Is In Jimmy's Class. He Is Voiced By Candi Milo From 2001. He Is Voiced By Jeff Garcia From 2006.
Courtney Tyler: Courtney Tyler Is In Jimmy's Class. She Is Voiced By Crystal Scales From 2001-2006.
Nissa: Nissa is Jimmy's classmate and somewhat rival in the episode See Jimmy Run who likes to skip rope. She is depicted as being happy, with blonde hair, a yellow shirt, blue pants, and a light complexion. She Is Voiced By Candi Milo From 2001-2006
Betty Quinlan: Betty is Jimmy's first crush who likes magic, singing, dancing and acting.
Ms. Fowl: is a 5th grade teacher at Lindbergh Elementary School. She is very sweet and makes weird clucking noises resembling a chicken (hence her name). She was a "Rodeo Queen" before becoming a teacher. It was rumored that she dated Thomas Edison and that she married a werewolf. She is friends with Principal Willoughby.
Principal Willoughby: Jimmy Isaac Neutron's Principal is the fat principal of "Lindbergh Elementary School." Energetic, enthusiastic, and over the top, he seems to be everything a good elementary school principal should be. He is approachable, kind, and has a gentle nature to him...not to mention that he's fairly clueless when it comes to most aspects of life. Despite this, he seems to have a knack for his chosen profession. He seems to genuinely care about his scholars, and has clearly taken the time to get to know each and every one.
Coach Gruber: is the strong, muscular coach of "Lindbergh Elementary School." Coach Gruber has black hair with a short beard, a red cap, short-sleeved T-shirt, black short pants and shoes.
Hilga: is the cafeteria cook. Portrayed as a large Russian woman with terrible cooking she is the stereotype school cook.
Bolbi Stroganovsky: is a foreign student who is class president. He doesn't have very good English speaking skills, though he does tend to sing a song going "Slap, slap, slap! Clap, clap, clap!" repeatedly. He has big eyes, black hair, and tends to wear sweater vests. Also, it is noted that he is a Shakespearean actor, despite his lack of skills in speaking English.
[edit] Jimmy's nemesisProfessor Finbar Calamitous: Calamitous is a recurring antagonist of the series, and his daughter is Beautiful Gorgeous. He is also one of Mrs. Fowl's past school pupils. Calamitous is a tiny, near-sighted, bald, short, eccentric, old, evil genius, who is one of the most brilliant and evil minds on the planet, and he'd be even more dangerous if he didn't have the bad habit of never finishing what he starts! Calamitous is determined to get Jimmy to finish his projects for him as he couldn't finish them himself. Calamitous was once a little boy, who could never finish anything (not even a sentence).
Beautiful Gorgeous: Gorgeous (whose real name is Georgia Calamitous), is Professor Calamitous' daughter. She is an evil villainess. When Beautiful Gorgeous was a child, her dream was to become the person who puts "those little plastic things on the ends of shoelaces" (these are called aglets), though she could have been lying. Was a playable character in the video game "SpongeBob SquarePants featuring Nicktoons: Globs of Doom".
King Goobot V: King Goobot V is the main antagonist in the feature film and the episodes The League of Villains and The Egg-pire Strikes Back. He tried to kill Jimmy and the town residents by feeding them to his god, Poultra, in the 2001 movie Jimmy Neutron: Boy Genius. He later tried to kill Jimmy by turning the residents against him and using Jimmy's DNA clone scanner to create a new Poultra and make Poultra eat the town residents. Later, he gathered with several of Jimmy's nemeses and was later deserted in the Cretaceous Period with the rest of the villains, menaced by a Tyrannosaurus Rex.
Twonkies: Twonkies are an alien species from the comet Twonkus 3. They go through 3 stages of life. Each metamorphosis is triggered by music. The first stage is a small fuzzy cute creature. However when exposed to music they morph into mid sized monsters who destroy the source of music. The final stage is caused by the Twonkies forming together to complete one giant 8 foot monster. It is finally defeated when they realize that Sheen's singing voice is so bad it is recognized as anti-music to the monster and it falls asleep, allowing Jimmy to launch it back to the comet. However, Sheen's Twonkie remains un-morphed and produces more Twonkies. There is no longer a problem with them morphing, but the remaining few make cameos throughout the 3rd season including at the end of the last episode still not destroyed.
Eustace Strych: The richest boy in Retroville. Eustace was attracted to Cindy, but then used her as a means to get to Jimmy.
Butch Pakovski: Butch is the slightly slack-jawed, unintelligent bully of Lindbergh Elementary School who doesn't have many friends at all (except his younger brother-name unknown). He is mostly seen bullying Oleander and Carl. He is voiced by Rob Paulsen.
Brittany: Brittany is in Jimmy's class. She can dance well, as she is seen dancing with Cindy and Libby as a third partner. She bribed Libby to be her science partner with a music CD in Raise the Oozy Scab. She is voiced by Candi Milo.
Arnie: Arnie Is In Jimmy's Class. He Is Voiced By Candi Milo From 2001. He Is Voiced By Jeff Garcia From 2006.
Courtney Tyler: Courtney Tyler Is In Jimmy's Class. She Is Voiced By Crystal Scales From 2001-2006.
Nissa: Nissa is Jimmy's classmate and somewhat rival in the episode See Jimmy Run who likes to skip rope. She is depicted as being happy, with blonde hair, a yellow shirt, blue pants, and a light complexion. She Is Voiced By Candi Milo From 2001-2006
Betty Quinlan: Betty is Jimmy's first crush who likes magic, singing, dancing and acting.
Ms. Fowl: is a 5th grade teacher at Lindbergh Elementary School. She is very sweet and makes weird clucking noises resembling a chicken (hence her name). She was a "Rodeo Queen" before becoming a teacher. It was rumored that she dated Thomas Edison and that she married a werewolf. She is friends with Principal Willoughby.
Principal Willoughby: Jimmy Isaac Neutron's Principal is the fat principal of "Lindbergh Elementary School." Energetic, enthusiastic, and over the top, he seems to be everything a good elementary school principal should be. He is approachable, kind, and has a gentle nature to him...not to mention that he's fairly clueless when it comes to most aspects of life. Despite this, he seems to have a knack for his chosen profession. He seems to genuinely care about his scholars, and has clearly taken the time to get to know each and every one.
Coach Gruber: is the strong, muscular coach of "Lindbergh Elementary School." Coach Gruber has black hair with a short beard, a red cap, short-sleeved T-shirt, black short pants and shoes.
Hilga: is the cafeteria cook. Portrayed as a large Russian woman with terrible cooking she is the stereotype school cook.
Bolbi Stroganovsky: is a foreign student who is class president. He doesn't have very good English speaking skills, though he does tend to sing a song going "Slap, slap, slap! Clap, clap, clap!" repeatedly. He has big eyes, black hair, and tends to wear sweater vests. Also, it is noted that he is a Shakespearean actor, despite his lack of skills in speaking English.
[edit] Jimmy's nemesisProfessor Finbar Calamitous: Calamitous is a recurring antagonist of the series, and his daughter is Beautiful Gorgeous. He is also one of Mrs. Fowl's past school pupils. Calamitous is a tiny, near-sighted, bald, short, eccentric, old, evil genius, who is one of the most brilliant and evil minds on the planet, and he'd be even more dangerous if he didn't have the bad habit of never finishing what he starts! Calamitous is determined to get Jimmy to finish his projects for him as he couldn't finish them himself. Calamitous was once a little boy, who could never finish anything (not even a sentence).
Beautiful Gorgeous: Gorgeous (whose real name is Georgia Calamitous), is Professor Calamitous' daughter. She is an evil villainess. When Beautiful Gorgeous was a child, her dream was to become the person who puts "those little plastic things on the ends of shoelaces" (these are called aglets), though she could have been lying. Was a playable character in the video game "SpongeBob SquarePants featuring Nicktoons: Globs of Doom".
King Goobot V: King Goobot V is the main antagonist in the feature film and the episodes The League of Villains and The Egg-pire Strikes Back. He tried to kill Jimmy and the town residents by feeding them to his god, Poultra, in the 2001 movie Jimmy Neutron: Boy Genius. He later tried to kill Jimmy by turning the residents against him and using Jimmy's DNA clone scanner to create a new Poultra and make Poultra eat the town residents. Later, he gathered with several of Jimmy's nemeses and was later deserted in the Cretaceous Period with the rest of the villains, menaced by a Tyrannosaurus Rex.
Twonkies: Twonkies are an alien species from the comet Twonkus 3. They go through 3 stages of life. Each metamorphosis is triggered by music. The first stage is a small fuzzy cute creature. However when exposed to music they morph into mid sized monsters who destroy the source of music. The final stage is caused by the Twonkies forming together to complete one giant 8 foot monster. It is finally defeated when they realize that Sheen's singing voice is so bad it is recognized as anti-music to the monster and it falls asleep, allowing Jimmy to launch it back to the comet. However, Sheen's Twonkie remains un-morphed and produces more Twonkies. There is no longer a problem with them morphing, but the remaining few make cameos throughout the 3rd season including at the end of the last episode still not destroyed.
Eustace Strych: The richest boy in Retroville. Eustace was attracted to Cindy, but then used her as a means to get to Jimmy.
