Meldar Prime is a villain in Jimmy Neutron. He is the evil and sadistic host of the game show Intergalactic Showdown which abducts various alien races and forces them to compete in the various games and challenges the show presented - The winning team got a space car while the losing teams' home planets were blown up. April, a Gorlock, forms an alliance with Jimmy to take Meldar down to shut Intergalactic Showdown off for good. He uses matrix generators hidden in his cufflinks to manipulate time and space, which makes him very powerful. During the final battle, Jimmy realizes this and has Carl swipe them from Meldar. He is defeated and demoted. Leaving him to be tortured and painfully electrocuted forever.
|The Adventures of Jimmy Neutron: Boy Genius|
|Characters||Main characters|| Jimmy • Goddard • Carl • Sheen • Cindy • Libby|
|Supporting characters|| Hugh • Judy • Nick • Britney • Butch • Betty • Bolbi • Miss Fowl • Sam|
|Villains||King Goobot • Ooblar • Poultra • Yokian Fleet Commander • Finbarr Calamitous • Beautiful Gorgeous • Jimmy Negatron|
|Productions||Interstitial shorts • Movie prelude • Movie • Episodes • Video releases • Jimmy Neutron's Nicktoon Blast • Planet Sheen|
|Video games||Jimmy Neutron: Boy Genius • Vs. Jimmy Negatron • Jet Fusion • Attack of the Twonkies|