Her first major role, SpongeBob and Patrick arrive at her house selling chocolate bars. She calls her mother over and tells her that SpongeBob and Patrick are selling chocolate. Patrick tells the two that they can live forever if they rub the chocolate on their skin. Mary desperately tries to turn them down but unfortunately for her, her mother decides to buy one. She then tells SpongeBob and Patrick that she hates them and slams the door in their face.
She and her mother are then on a "date" with SpongeBob and Patrick at Fancy! at the end of the episode.