Over in the General GB Discussion forum, Peter Venkmen posted a video of a “condensed” Ghostbusters Spooktacular show. It probably came from a souvenir tape, and it revealed three more ghosts I didn't know about before:
–The Horned Beast, a dragon-like creature, which I'll probably stick in the Haunted Castle level as a miniboss right before the Three-Headed Monster.
–The Deranged Hag, a crazy old lady with nasty, serrated teeth. She can go in the Creepy Circus level as one of the freaks…could Killer Jack use an assistant in the boss level? (EDIT: I think UltimateGBFan already made a vague reference to her becoming the “fake ghost” Louis uses to scare away Walter Peck…actually that was the Hobo, but I was under the impression that the Hobo turned into the Hag for a while)
–The Convict, a deformed prisoner in striped uniform. I think I'll put him in the Runaway Train level as the ghost who keeps trying to change tracks on the Ecto-Tram.