Grundgetta is Oscar's Grouch girlfriend on Sesame Street. Her earliest appearance was in Season 12. Oscar occasionally calls her Grungie, while she generally calls him Oskie. She and Oscar, in addition to being a "couple", are also best friends.
Like Oscar, Grundgetta has had a number of pets over the years, including her worm Sylvia, a rottendoodle named Itchy and a muddy piglet who won the Yucchiest Pet contest in Oscar's Grouch Jamboree.
In a video released on Sesame Family Robinson, Pam Arciero played around with the Grundgetta puppet. Grundgetta commented that she was nervous since she hadn't been on camera in months, referencing her absence in recent years.