Sludge Man was once a sanitation robot, used for purifying polluted environments ruined by industrialization. Once Wily reprogrammed him, he was used to hold hostage the city of Monsteropolis by threatening the water system with contamination. Sludge Man can fire jets of corrosive grime at his foes, which can eat through any metal. His special alloy coating both inside and out prevents him from being effected by the acidic mixture, allowing him to ambush meddlesome blue robots from anywhere there's waste