Executive Meddling: The later episodes were toned down, Mainly due to the earlier episodes showed deathly situations that were seen as too dark and scary for a kids show witch explains the Deus ex Machina plot point which is the Ghost Trap.
Keep Circulating the Tapes: The show had only six episodes released on VHS in the United States and has zero DVD releases. Thirteen episodes have been released on DVD overseas but the rest of the series is no where to be found. The only places the series can be found are on YouTube and torrents (though most of the episodes are recordings from when the show was on Toon Disney, so some scenes of horror may be edited). However, the show can now be watched on Hulu.
The Merch: Trendmasters released action figures and role-play accessories. The most notable of these were the deluxe figures, which featured battery-powered packs with light and sound.
Recycled Script: It's odd how difficult Egon found it to tell Janine he loves her in the climax of "The Crawler," considering they went through the exact same situation in the original series episode "Janine, You've Changed."
However in some TV listings the show was confusingly called "Ghostbusters Dark".
An early video promo shows a ghost trap that used three arms as a cover instead of the three-piece dome cover seen in the final version.
This early logo◊ that was found on a animation website shows rivets in the red 'Ghostbusters'' logo, which were removed in the final version. Even the word "Extreme" is stylized is a manner not seen anywhere else. This rivet logo would actually appear in the series itself; seen on the firehouse in the episodes "Home Is Where The Horror Is" and "Moby Ghost".
According to Maurice LaMarche, Frank Welker was approached about reprising Slimer. However, the recording sessions were at night in order to accommodate the schedules of cast members who worked on live-action projects. Since Welker's schedule was busy enough as it was, he opted to just step aside and gave them his blessing to recast Slimer. However, Welker did return to voice Ray Stantz in the last two episodes.