Slimer, also known as Onionhead, Little Spud, or The Green Ghost, was a ghost made pure Ectoplasm and the first ghost successfully captured by the Ghostbusters! Slimer is well known for his gigantic appetite and the slime he leaves behind... This is the FIRST APPEARANCE of this character in premium digital format. This series is available globally. TM & © 2020 Columbia Pictures Industries, Inc. All Rights Reserved.