Slimer (voiced by Frank Welker) is the Ghostbusters mascot and a member of Pooh's Adventure Team.
- Jeffrey and Jaden will first meet Slimer in Jeffrey, Jaden & Friends join the Ghostbusters.
- Jeffrey and Jaden will meet Slimer again in Jeffrey, Jaden & Friends' Storm Adventures of Ghostbusters II.
- Slimer will meet Craig in Craig & Friends join the Ghostbusters. Then he'll reuinte with them in Craig & Friends Adventures of Ghostbusters II, in which after he joins the club, Slimer will serve as the eyes and ears to Craig's team.
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