In "Dances with Smurfs", Mike is one of the applicants to replace Gordon Stoltski as South Park Elementary's morning announcements reader. He tells Eric Cartman that the reason he is applying for the post is to raise his self-esteem. Unfortunately for him, he was not selected for the job.
Mike wears a gray t-shirt, a dark gray sweater vest, and dark grey pants.
He speaks with a severe stutter, not getting past the first word in the passage Mr. Mackey asks him to read. He has low self-esteem, most likely caused by his severe stutter.