The cartoon series of the Ghostbusters is called "The Real Ghostbusters". The only reason why it wasn't just called Ghostbusters is because, a kids show in the 1970's was aired by Filmation, and they called it Ghostbusters. I'm not too sure exactly what the show was about, but DIC/Columbia Pictures decided to call their cartoon series The Real Ghostbusters I guess it was to avoid a legal battle with Filmation over the rights of "Ghostbusters".