Megas XLR

Season 1, Episode 12: Coop D'Etat

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Coop accidentally destroys a sacred treasure of the Azion Worlds, a robotic, alien empire - the Flame of Azeroth. The Emperor declares whoever captures Megas and bring it to judgement will be named as the new Emperor, so now Coop has to fight off a bunch of Azionites in the deep, dark reaches of the final frontier, all of which are, if necessary, willing to destroy each other to become the Emperor. (Note: due to a tape mixup, this episode was not shown until nearly a year later).