Extreme Ghostbusters(1997 - 1998)
Follow-up to the classic 1980s series involves Egon and Slimer from the orignal team as mentors to a group of multi-diverse teens who have taken over from the original guys. This series was much darker in tone than the original series, and some of the creatures were genuinely frightening. The humor of the original was maintained without becoming too cheesy as the old series became by the end. The writing was very sharp and smart, far better than the average animated fare on at the time, with genuinely interesting characters and stories.
Some fans complained that this wasn't the Real Ghostbusters they remembered because it was a new team. But the essence of the original was maintained - the often difficult balance between horror and humor. Sure, the characters were different, but they were INTERESTING characters. And the "feel" of the show was undeniably Ghostbusters. The original team showed up towards the end of the series for a special two-parter entitled "Back in the Saddle," where they fought alongside the new team.