The Demolisher is a brown rottweiler-looking space traveler who is driven only by the desire to fight and destroy. He is accompanied by his side-kick and cheerleader, Dirge . He landed on Third Earth to challenge Mumm-Ra to a fight. The Demolisher is victorious against Mumm-Ra and sends him running back to his Tomb. Mumm-Ra acknowledges the power of Demolisher, and convinces him to seek and destroy Lion-O. The Demolisher, searching for another fight, gladly accepts Mumm-Ra advice. He battles with Lion-O only to face defeat and flee in shame from Third Earth.