Movie Rating 6 0The 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. Download Summary 6.0 good Batman Unlimited: Monster Mayhem (2015) 0The 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. Download: Batman Unlimited: Monster Mayhem (2015) 2015 Brian T. Delaney Janell Cox Troy Baker Streaming and download link will work only for Authorized Users. Read this for more info.