The costume is designed to be a giant Krabby Patty wearing goggles and a suit, and has lavender hands and legs.
Role in episode
The Killer Krabby Patty comes to save SpongeBob from the other restaurant owners, beating up all of them except Mister Weiner, who walks off and then gets hit by a bus.
He brings SpongeBob back to the Krusty Krab, which is ruined due to how Mr. Krabs has been managing it, and then reveals to SpongeBob he is Squidward, and says that although he dislikes SpongeBob, he dislikes the smell of burning Krabby Patties more.
The Killer Krabby Patty looks similar to McDonaldland's Mayor McCheese.