Smelly Grungie is the daughter of Foul Grungie and Pig Grungie and the sister of Bug Grungie. She likes to listen to music but her brother, not so much. Smelly let Egon and Ray in under the pretext they would blow up the Firehouse. She asked they start with Bug's room. Eventually, she lost interest and returned to Bug in Egon's lab. Smelly danced along to the music machine but when things got out of hand, she asked her parents for help.
- Smelly is a parody of Lisa Simpson. Her fascination with music may be a reference to Lisa's saxophone-playing.
- Marsha Goodman (1990). Episode Call Sheet and SAG Report - "Guess What's Coming to Dinner" (1990).
- Bug Grungie (2009). The Real Ghostbusters - "Guess What's Coming to Dinner" (1990) (DVD ts. 01:40-01:42). Time Life Entertainment. Bug says: "Wow, Smelly. Check it out!"
- Foul Grungie (2009). The Real Ghostbusters - "Guess What's Coming to Dinner" (1990) (DVD ts. 02:30-02:31). Time Life Entertainment. Foul says: "C'mon, Grungies! Hustle up!"