Meldar Prime appears in the Jimmy Neutron TV movie Win, Lose and Kaboom as the antagonist of the film.
He is the 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 down for good.
Mekdar 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 swiped them from Meldar using his Florgus, Sugar Cube. He is defeated and demoted, leaving him to be tortured and painfully electrocuted forever.
Meldar is presented as a typical game show host but also a cruel, sadistic and arrogant businessman who only cares about the ratings of his show, and has no qualms with destroying entire planets if it means gaining more ratings and popularity to make his show successful. He is sadistic and mocking to the competitors (Jimmy and his friends especially), and the power afforded to him is the reason why his Matrix Generators went to his head.
- Meldar's name is a play on the Nintendo video game, Metroid Prime.
- Meldar seemed to have wanted to blow up Earth since he'd done things like forcing Jimmy and the others to vote one of their mates off their team so that way they'd be short handed (Although even with the one less member, they still had more teammates than the others), and trapping Goddard in a force field bubble before he could race with Jimmy and the others against the Brains across the Obstacle Course not allowing him to do so so that way when the Brains put them in their hypnosis they'll not be able to have a way to help them get through the dangerous course after they wake up so they won't be able to catch up to them in time allowing Jimmy and the gang to lose Intergalactic Showdown.
- Meldar is a parody of Jeff Probst from Survivor.
- It is unknown why he is not part of the League of Villains, though it could be due to him losing his powers at the end of the episode.