|Marvin the Martian
Marvin's origins prior to season one of Generic Quest are unknown.
When Marvin found the legendary Crystal of Eyefourgott on his homeplanet of Mars, he became greedy and stole it for himself, hiding it in an underground chamber. At some point thereafter, he became trapped in the pocket dimension lair of Majcorp chair Harold Sun. When Dokuma was mysteriously teleported to this realm after retrieving the Eyefourgott, Marvin battled him and was defeated.
Shortly after Majcorp's invasion of Mars, Marvin resurfaced, seeking vengeance against Dokuma. When Dokuma used some of the Crystal's positive energies to destroy the planet, Marvin was killed.