Seen in: Ghostbusters (1984)
Strengths: At over 100 ft. tall, sheer size is the only real strength here - and the mental trauma inflicted by seeing a lovable corporate mascot turn a city block into dust.
Weaknesses: An extreme vulnerability to fire or crossed streams.
The Stay Puft Marshmallow Man - technically an 'ectoplasmically-animated gateway homunculus' - may seem squishy, but as the physical manifestation of the extra-dimensional being Gozer, it's not to be trifled with. Let's be honest: Riddick would have no trouble taking him out (with a few clever quips at the expense of his neckerchief). While blades or bullets might be ineffective, expose this monster to an open flame, and Riddick's one massive graham cracker and chocolate bare away from the world's biggest s'more. But we still want to see Mr. Stay Puft get what's coming to him.