Mary Hartless originated as a character on Tiny Toon Adventures in the episode "Thirteensomething" where one of the stories she reported on was "My voice causes seizures!"
She was voiced by Valri Bromfeld on Tiny Toon Adventures and in her first four Animaniacs appearances, then was subsequently played by Tress MacNeille.
Tiny Toon Adventures
- Episode 16: Chalkboard Bungle/Hurray for Slappy/The Great Wakkorotti: The Master & His Music
- Episode 32: Chairman of the Bored/Planets Song/Astro-Buttons
- Episode 36: Critical Condition/The Three Muska-Warners