Grumm is a fictional character from the animated series The Amazing World of Gumball. He is known for his unique appearance, which includes a round body and a simple face. Grumm often serves as a comedic element in the show, contributing to the lighthearted and whimsical atmosphere that defines the series. In the context of The Amazing World of Gumball, Grumm interacts with other characters, such as Gumball Watterson and Darwin Watterson. His simplistic design and humorous personality make him a memorable part of the show's diverse cast, appealing to both children and adults alike.