In "Monsters, Inc.," Sulley is the big, tall monster with blue fur and purple spots.
His full name is James P. Sullivan, and he is one of the top scarers working at the Monsters, Incorporated factory in Monstropolis. Sulley is designed as a huge, furry monster with a bear-like face, horns, a long tail, and a blue-green coat marked by purple spots.
Sulley's intimidating appearance contrasts with his personality. He begins the story focused on maintaining his reputation as an elite scarer, but his friendship with Mike Wazowski and his relationship with Boo lead him to question the factory's fear-based system. By the end, protecting Boo matters more to him than maintaining his record.
Viewers sometimes confuse Sulley with Randall Boggs, another prominent monster in the film. Randall is slimmer, purple, and reptile-like, while Sulley is the large blue-and-purple-spotted character voiced by John Goodman.