

On his first day, Mike befriends his roommate, the nerdy and shy Randall "Randy" Boggs, who desires to be popular and has difficulty controlling his camouflage power. Years later, thanks to his hard work and lots of studying, Mike is accepted as a freshman at the prestigious Monsters University, majoring in scaring. Mike decided from then on, that he would grow up to be the best scarer of all. Frank was amazed, not even knowing Mike had been in the room with him and gave him his Monsters University cap. Mike secretly followed Frank into a door he was scaring in, much to the shock of his class and teacher.

Mike was amazed by the scare floor and the scarers themselves, and one scarer, "Frightening" Frank McCay, told him that he learned how to be a scarer at Monsters University. Unfortunately, as a young child, Mike didn't have many friends, as shown when he and his class went on a field trip to Monsters, Inc., and he was partnered with the teacher. His eye and mouth take up the majority of his body. On his head is a pair of short horns with dark gray tips, and a mouth with jagged teeth. He has slender arms and legs, both with claws, but he has four fingers on each hand and three toes on each foot. Mike is a spherical green-skinned monster with a single emerald green eye.
