Which McDonald's character was known as the thief who loved hamburgers?

The Hamburglar was McDonald's advertising character portrayed as a thief who loved hamburgers.

He was one of the central figures in McDonaldland, the fictional world created for McDonald's advertising. The character's early design was more unusual and sinister-looking, but he was later redesigned as a smaller, child-friendly figure wearing a black-and-white striped outfit and a red cape. His recurring stories centered on attempts to take hamburgers, especially the Big Mac.

The Hamburglar is sometimes confused with Captain Crook because both were mischievous McDonaldland characters. Grimace, by contrast, was generally presented as a large, friendly character, while Mayor McCheese was a civic leader with a cheeseburger head. These sharply defined roles helped McDonald's turn individual menu items and restaurant visits into a broader character-based brand world.