Terror dogs (Type of Creatures)

From Ghostbusters Wiki

The Terror Dogs are horned dog-like demonic monsters with blazing red eyes and powerful dark-colored bodies. They are Zuul The Gatekeeper & Vinz Clortho The Keymaster, loyal minions of Gozer the Gozerian. Zuul & Vinz took possession of the bodies of both Dana Barrett and Louis Tully, transforming them both into their true demonic form in order to secure the arrival of The Destructor.

Not much is known about the creatures as they are not shown much in even the animated series. Though (assumedly) un-named Terror Dogs do make cameo appearances in the episodes "Egon's Ghost", as well as "Copycat" and even in the second intro.

When briefly encountered by humans, most people initially confuse the creatures for "dogs", "bears", or "cougars".

While not part of Kenner's "Real Ghostbusters" toy line, NECA Toys created action figures based on Zuul and Vinz Clortho. The Mini-Mates figures will also produce figures based on the Terror Dogs.