Clark is a 5th Grade student at South Park Elementary. He first appeared in the Season Nine episode, "Erection Day".
In "Erection Day", he and Laura performed a magic act during the talent show. Clark played the role as the magician, and Laura played the assistant. Clark made Laura disappear and brought her back using a box.
Clark wore a black tuxedo with a black bow tie. He also wore white gloves and a black top hat with a red trim. He has long, brown hair.