From the desk of icecreamman:

“Based on the 80’s Ghostbusters cartoon character. Hope you like it. “

And from Wikipedia:

“Egon Spengler, Ph.D. is a fictional character appearing in the films Ghostbusters and Ghostbusters II, in the animated television series The Real Ghostbusters, and later in Extreme Ghostbusters. He is a member of the Ghostbusters, and one of the three doctors of parapsychology on the team. Spengler was portrayed by Harold Ramis in the films and voiced by him in Ghostbusters: The Video Game.”