Everything you wanted to know about Jimmy Neutron
I have been scavenging the web for little known facts, trivia, and any other info I can find on the boy. E'mail me if you have anything to add and I'll see what I can do about getting it up here ^_^

Interesting Tidbits
Source: The Core Information on Jimmy Neutron

Jimmy's first incarnation was in 1995 when he, as Johnny Quasar with his robot dog, Goddard, began their rocketing adventures. Since then has come "Santa vs. The Snowman," "The Barnyard," and most recently Jimmy Neutron.

The Core Information on Jimmy Neutron

Bloopers and Mistakes
Source: Movie Mistakes.com

In the scene where Jimmy Neutron is giving birthday presents to his mum he pulls out a necklace and some earings from a bag. His mum only takes the necklace from him but the earings are no longer in his hand.

In the opening sequence, Jimmy uses a long string from Carl's shirt to help launch the satellite. Jimmy then launches Carl from the rocket. That same morning, Jimmy finds Carl hanging from a tree, and his shirt is intact.

In the classroom after Cindy is done explaining her dinosaur report she heads back to her desk, Jimmy and Cindy get in an argument when it cuts to Jimmy, in the background you see Carl standing up and not sitting.

Nick's necklace is a string looped through a ring, but sometimes the string makes only one pass through the ring and sometimes two.

In the scene where Jimmy goes to check his experiments, you see a fish tank type thing and when he gets there he then checks the invisible hamsters and the girl eating plant, but when he gets to the burping soda the fish tank thing is gone

When the aliens are watching Jimmy's greeting video, there is a shot where he is showing a picture of his parents. When he points to his mom, he says "Dad" and when he points to his dad he says "Mom." A slight mixup. [Correction: Right after this happens, and the aliens begin to talk about how delicious the parents look, in the background you can hear Jimmy saying that he got it backwards.]

In "Calling All Aliens Part 1" (a short on the Jimmy Neutron: Boy Genius DVD), Sheen is sitting at Jimmy's desk. This is a goof in itself, but in "Calling All Aliens Part 2," just a few seconds later, Sheen is at his own desk.