Special Guest Stars Tim Robinson voices Mercer Bowen Yang voices Richard Lizzo voices Herself Lizzo voices Goobie Woo Guest Stars Grey DeLisle Griffin voices Martin Prince Tress MacNeille voices Crazy Cat Lady Tress MacNeille voices Train Announcer Tress MacNeille voices Tortured People Pamela Hayden voices Tortured People James Sie voices Pol Pot Kevin Michael Richardson voices Fat Goblin Chris Edgerly voices Tortured People