So it seems we've been adding monsters that are either not in the movie, or are duplicates of monsters we already have.
Dark Spirit is simply the Wraith, yeah, the colors are different, but there's WraithS, so it can simply be another differently colored Wraith.
Big Gorilla Wolf Motherfucker does not appear in the movie.
Cow Skull Giant is simply a behind-the-scenes look at the Bull-Headed Phantom.
Demon is a concept for the Red Dismemberment Goblin.
And for the love of all that is holy, please don't just say x summons y if it hasn't been officially stated as canon.