The Extreme Ghostbusters Ghosts line stayed true to the darker tone of the new series. Only four ghosts were released: an oversized Slimer with spinning action, Sam Hain with launching pumpkin head, the House Ghost and the Mouth Critter.
Sam Hain was featured in the intro of the Extreme Ghostbusters cartoon but otherwise never made an appearance in the show. The House Ghost was packaged with a bottle of Ecto Plazm to ooze out of his mouth, which today bears the consistency of greenish water. The Mouth Critter ghost could shoot a spring loaded missile out of the mouth on its head, as if it were shooting Ecto Plazm directly at our young heroes!