Sulley is a Scream Motors Monstrocity SI, a rather large model. He is painted blue with several purple spots, and has two horns above his blue mirrors. He has four large snow tires with purple rims, as well as a blue nose on his hood.
Sulley makes an appearance as a playable character in Cars: Mater-National Championship, though he can only be selected in the Mike and Sulley's Last Laugh minigame and Waypoint Races in arcade mode. He also appears as the opposing competitor during all six levels of Mike and Sulley's Last Laugh in the game's story mode, in which he and Mike challenge each other to see who can collect the most laugh canisters.
Additionally, Sulley hosts the James P. Sullivan Cup in the story mode, which is an event consisting of three monster truck races, and whoever wins will receive a sticker. Of the three races, Sulley competes in the second and third events, but ultimately loses to Monster Mater.
"Sully is the top scarer at Monster Trucks, Incorporated. He's looked up to by all the other trucks in the Scare Garage because he's the biggest, baddest, blue-ist thing on four gigantic wheels, but deep down inside, he's as gentle as a hybrid."