Ultimate Burger

The Double King Triple Deluxe (Don't Spare the Hot-Sauce) Ultimate Burger (or, more simply put, the Ultimate Burger) was the whole reason that Fatty Roswell put Elvis into Earthworm Jim's four brains in Earthworm Jim 3D, because he believed that was the key to the recipe for it. It has a golden crown with six purple gems around the brim and a pair of sunglasses.

Trivia

Elvis was made into it.
King Gherkin was also made into it.
Its sunglasses are just a modified version of Elvis' sunglasses.