Guest Stars Lauren Tom voices Amy Wong David Herman voices Fat-Bot David Herman voices Dean Vernon Tress MacNeille voices Guenther David Herman voices Niedermeyer Lauren Tom voices Chrissy Tress MacNeille voices Intercom Voice Tress MacNeille voices Dorm Girls Uncredited Danny Jacobs voices Additional Voices Frank Welker voices Guenther's Parents Frank Welker voices Hatless Guenther