It was the real Ghostbusters episode. It wasn't when slimer had the intro it was the original episodes. Slimmer had gone into the ghost chamber and Egon had to go in with a space suite and save him. It was great episode and wondering if any one knew what the episode was called.

http://www.tv.com/the-real-ghostbusters/show/1547/episode_guide.html?season=0&tag=season_dropdown;dropdown;7

This is a site that has an episode guide of the Real Ghostbusters. Hopefully this will help you.

thanks are check it out.