Slimer is credited as a cast member during the closing title sequence.
There is a brief scene in the end credits of the Ghostbusters being honored at an apparently restored Statue of Liberty.
There are no opening credits, other than the title - which is represented by an animation of the movie's logo - The ghost bursting out of the first movie's barred circle logo and holding up two fingers. The title proper doesn't appear until the very end of the closing credits.
Bathtub Trainer ... Tom Floutz
Bathtub Wrangler ... Wim Van Thillo
PLUS 200 ARTISTS AND TECHNICIANS AT ILM
River Rats ... Ralph Miller, III & Jack Haye