Sludge is a fictional character in the Transformers franchise, best known as one of the Dinobots. He transforms into a brontosaurus-like dinosaur and is typically portrayed as strong, slow, and somewhat dim-witted, but also loyal and dependable. In the series, he serves as a powerful frontline fighter for the Autobots, often relying on brute strength rather than strategy. Sludge is usually depicted as friendly and easygoing, with a childlike personality that contrasts with his intimidating robotic dinosaur form.