Do monsters play volleyball? In this game they do, and they are surprisingly good at it. Two monsters face each other on either side of the net, and the rules are the volleyball you already know.
Choose your monster before the match. Do you want the scariest one, or a cute one to match the rival? Then keep the ball from touching the ground on your side and send it over the net with your monster's head. Land it on the opponent's side to score. May the best monster win.