Sulley, also known as James P. Sullivan, is a fictional character from the animated film series Monsters, Inc. produced by Pixar Animation Studios. He is a large, blue, furry monster with purple spots and is known for his friendly personality. Sulley works as a "scarer" in the monster world, where he collects children's screams to power his city. In the story, Sulley is best friends with Mike Wazowski, a small green monster. Together, they navigate challenges in their jobs and personal lives. Sulley's character evolves throughout the films, showcasing themes of friendship, courage, and the importance of laughter over fear.