I like the theme, lots of creative ideas in this thread. If this pin includes a bashing toy ( like sparky, well walker ) it needs to be Slimer. Slimer is a huge part of ghostbuster. Actually I think if I remember the documentaries it was not meant to be but the cool quotes from Murray like the : he slimed me created a surprise attraction for this caracter.
Even my kids, still very young but when we talk about ghostbuster : oh yeah dad, the glow in the dark monster who slime people and eats sausages.
Personnaly I just want to bash him