- 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 the European 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.
- Toyless Toyline Character: Garrett was not included in the toyline, although a prototype figure of him exists.
- The Other Darrin:
- Neither Laura Summer nor Kath Soucie returned to voice Janine. Her voice actor in this series was Pat Musick.
- Billy West took over for Frank Welker as Slimer, although Welker returned as Ray Stantz.
- While Frank Welker reprises his role as Ray Stantz in the Grand Finale two-parter "Back in the Saddle", some of his lines were actually done by Pat Fraley because of Welker being sick at the time those lines were recorded.
- 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."
- Role Reprise: Not only does Maurice LaMarche reprise his role as Egon Spengler from The Real Ghostbusters, but the two-part episode "Back in the Saddle" also has Frank Welker, David Coulier, and Buster Jones return to reprise their roles as Ray Stantz, Peter Venkman, and Winston Zeddemore.
- What Could Have Been:
- The show was originally planned as a series-wide Myth Arc revolving around a coming war in the spirit world between supernatural ghosts (dead humans) and "peranatural ghosts (ghouls)" (spiritual entities like Gozer who were never alive to begin with). The ghouls were originally written as demons (but that was nixed early on to avoid offending anybody's religious sensibilities) that threatened to spill over and destroy the Earth. Also, Egon would have long since quit his job at the university to become a mystic and travel through the afterlife (losing his ability to speak english and speak in an unknown ghostly language), only returning to the world of the living to warn people about the war. Janine would have been the teacher and it would have been her who put the group together.
- An early version of the intro (used as a promo on certain Columbia-Tristar VHS tapes) 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 in a manner not seen anywhere else. This rivet logo would actually appear in the series itself; it's seen on the firehouse in the episodes "Home Is Where The Horror Is" and "Moby Ghost".
- Gnat, a mischievous goblin who would have joined Slimer as a second Non-Human Sidekick/Team Pet, never made it to the final show.
- Ghosts from the first show such as The Boogeyman, Sandman, Ghost Master, Stay Puft, etc. was planned to appear but the only ones that made it was the Grundel, and Ragnarök.
- Garrett was originally going to be a girl named Lucy. But when he was changed he was originally named Lucas.
- Roland was originally a clumsy Gentle Giant, Eduardo had a dream of running in the Olympic Games, and Lucas had a Hair-Trigger Temper. (Some of these still made it to the character profiles on the EGB website.)
- 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.
- Garret's nightmare in "In Your Dreams" was originally going to be a lot worse. It was going to be his mother torturing him with a cattle prod!
- The Wiki Rule: Ghostbusters Wiki, the compendium of ghostbusting.
- Working Title: In early development, the show was called Super Ghostbusters which was dropped in early development- so early that the crew working on the show doesn't remember that title, but early promotional material◊proves it was used◊. Although confusingly, In some TV listings, the show was called Ghostbusters Dark.
Trivia / Extreme Ghostbusters