The Bunnycorn janitor makes his first appearance in the episode "So, You Want to Be a Vampire?" where he cleans up the street after the spread and curing of the Mad Larry Disease.
In "Fools for Love", Mark Lilly walks in on him masturbating in the janitor's room. Then he is seen to have been killed by Barney Snodgrass and hung outside the safe room. However, as that is only an April Fool prank, he is seen alive again outside the Department of Integration after Mark and Callie Maggotbone's engagement.