Bogeyman (Real Ghostbusters)

The Bogeyman was a supernatural creature that fed on fear (especially that of small children), and was able to access our world from his dimension via closets. Egon Spengler was driven to become one of the Ghostbusters because of his encounters with the creature. As an adult, with his teammates' help, he defeated the Bogeyman and trapped him in his world on two occasions.