Monsters Inc. Characters
From Disney's Hollywood Studios Wiki
 Characters Synopsis
 James P. Sullivan
James P. Sullivan, better known as Sulley, is a large, furry blue monster with purple spots, voiced by John Goodman. He is the top scarer at Monsters, Inc., responsible for generating the scares that provide power for the city of Monstropolis along with his partner, Mike Wazowski. Though Sulley is an expert at his job, he is actually very kind hearted, and is very worried about the impending energy crisis to Monstropolis if they can't generate enough power. He is voiced by John Goodman.
 Mike Wazowski
Mike is Sulley's best friend, and partner at work, and one is rarely seen without the other (except when mike is on a date with girlfriend, Celia). Mike is a fun loving little guy, who is never insecure about his height, but rather is the first to make a joke about it, in fact, when Sulley finds human laughter is more powerful than scream, Mike becomes the top laugh inducer. He is voiced by Billy Crystal.