Special Guest Stars Dan Castellaneta voices Robot Devil Adam Horowitz voices Ad-Rock's Head Adam Horowitz voices MCA's Head Mike D voices Mike Diamond's Head Beastie Boys voices Beastie Boys Heads Guest Stars Phil LaMarr voices Hermes Conrad Lauren Tom voices Amy Wong Phil LaMarr voices Lionel Preacherbot Tress MacNeille voices Hookerbot 5000 Tress MacNeille voices Lady with Purse Uncredited Frank Welker voices Nibbler Danny Jacobs voices Additional Voices Susie Geiser voices Additional Voices