Mr. Ross is the main antagonist in Regular Show: The Movie. He was an insane evil volleyball coach/science teacher who wants revenge on Rigby for both ruining his volleyball championship game, and getting him sent to prison by accidentally exposing his illegal plutonium smuggling. Unaware to him, Rigby's reason on ruining his volleyball championship game was meant to get revenge against the bully Francis Jablonski, for bullying Rigby many times.