Slimer is a fictional character from the Ghostbusters franchise. He appears in the films Ghostbusters (1984), Ghostbusters II (1989) and Ghostbusters: Answer the Call (2016), in the animated television series: The Real Ghostbusters, Slimer! and Extreme Ghostbusters, and in the video games Ghostbusters: The Video Game and Beeline's Ghostbusters. Slimer was voiced by Ivan Reitman and Adam Ray in the films and by Frank Welker in the cartoon series. In The Real Ghostbusters, he is the Ghostbusters' mascot and friend (unlike the films, where he is just a ghost who needs to be busted).