You are watching Batman Unlimited: Monster Mayhem the movie produced in United States of America belongs with duration 81 Min in Category Action,Animation,Family,. broadcast at streamingjoy.com , by [ Warner Bros. Animation ] ,[ DC Entertainment ] The Joker is aided in his Halloween quest to render modern technology useless and take over Gotham City by Solomon Grundy, Silver Banshee, Clayface and Scarecrow..