Big Mouth Ghost is one of a number of ghosts that appear in the The Real Ghostbusters Pilot. He has also appeared in many promotional items including Milton Bradley The Real Ghostbusters board game on a card.
A medium sized creature with psycho looking eyes and a gaping open mouth. Many times he is also seen with his left arm/hand up to the side of him.
- On Cover RI of Ghostbusters Issue #15, the Big Mouth Ghost makes a non-canon cameo.
- The Real Ghostbusters Board Game by Milton Bradley (Game card)
- The Real Ghostbusters Naipes (Card Game) by Cromy (Game card)
- Kenner's Nutrona Blaster (on back of packaging)