* StillbornFranchise: Was supposed to have a sequel but was scrapped due to the game's commercial failure.
* WhatCouldHaveBeen: The game includes a rather fascinating library of concept materials unlocked by obtaining the hidden Platinum medal on each of the bonus challenges, including more than a few scrapped enemies (most of which are [[OurVampiresAreDifferent variations upon the classic "Dracula" vampire design]]) and even a few unused levels. Among the unused levels are some incredible-looking environments:
** ''The Bakery'' looks a lot like a cross between the Kitchen and the Workshop, with kitchen implements on numerous tables and a large oven in one corner.
** ''The Gallery'' was a wide-open space with paintings and easels strewn about.
** ''The Museum'' may very well have been the largest room in the game, featuring innumerable displays ranging from a pirate ship to several Venus Fly Traps (which are pictured in other ConceptArt as rejected enemies).
** ''The Observatory'' was more like a planetarium from the artwork, with a complete model solar system and several other celestial dioramas.
** According to ''Rare Revealed: The Making of Grabbed By The Ghoulies'', A Co-Op feature was attempted by various members of the ''Ghoulies'' team, but the small arenas combined with the Camera made it difficult to maintain visual clarity, and was eventually dropped. A Museum room was also planned to show off all of the scrapped concepts, but, Ironically, it itself was scrapped, with many of the materials moving to the bonus books.
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