Nudar

Nudar was the leader of the alien nudist scammers (thus the villains) in.

Biography
While little is known about his past, he and his two companions have apparently been scamming people for a long time. When the Planet Express crew arrives at their planet, they seize their chance to scam them. They have scam them out of their money and gain control of their firm. It is then they discover the key to the time sphere on Fry's buttocks, and use it to travel back in time to steal valuables from Earth.

With the money gained from the valuables, they buy the planet. And thus they build a fleet of remote control solid gold Death Stars. But the Earthlings strike back, and soon all is lost, and their final triumph card, the doomsday device is also out of their hands, and destroys them all except Nudar, who was wearing a doomproof shirt at the time. But he is killed as he, together with Lars Fillmore, are the victims of Bender's Auto Destruct Sequence.

Trivia

 * He is David X. Cohen's favourite character.
 * It is interesting to note how well educated Nudar is in Earth's history, and thus know everything of value in Earth's history. Although he at no point makes it clear that he means Earth's or the universe's valuables.