Meldar Prime appears in the 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 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 using "sugar cubes". 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 why his Matrix Generators went to his head.