SpongeRobert SqaurePants, is a sea resident of Bikini Bottom. He assists Sandy in a project using "imagination", a suit of armor that SpongeBob continued to wear to combat crime around his home city. He became a billionaire that caused jealousy of his boss Mr. Krabs, who attempted to kill SpongeBob but he defeated him, becoming known as the superhero "Iron Sponge". SpongeBob, Iron Man, superhero, Bikini Bottom, imagination, adventure, crime fighter, Mr. Krabs, billionaire, hero, underwater, Bikini Bottom protector, comic book character, animated series