The hero of this film is a boy named Harry Potter Jr, who is surrounded by a fantasy world of witches, wizards, trolls, and magic, 11 years before J.K. Rowling's Harry Potter novels swept the publishing world.
Director John Carl Buechler had been so impressed with Noah Hathaway's performance in "The Neverending Story" that he cast him as the lead in the film.
The picture of Galwyn in his human form (before being turned into a mushroom) that Eunice St. Clair shows Harry Potter Jr. is a caricature of the film's director John Carl Buechler.
In John Carl Buechler's original story treatment, Torok was a monster who was systematically killing off the inhabitants of the building slasher-movie style. Producer Charles Band however wanted to create a PG-13 movie so the story was altered and the fantasy element created.