Slimer! And the Real Ghostbusters

Rainy Day Slimer (1x21)

Air date: Jan 28, 1989

The Ghostbusters go to an amusement park; Slimer wants to go too. The Ghostbusters tell him he can't go. Slimer decides to draw things that reminds him of the amusement park right at home like the bumper cars, etc. he has a lot of fun with his friends away.