If you've seen the first Wishmaster and you start feeling a sense of deja vu while watching Wishmaster 2, it's because they are basically the same movie. Minor changes, or maybe enhancements, are made to certain elements of the story, but it's still the same story wrapped inside the same story structure. Djinn is released, Djinn grants wishes to random people and gross stuff happens, female protagonist has hallucinations and dreams about the Djinn until their final "battle" where her last wish sends him back. It happened in the first one and it happened in the second one... makes me really hope that they have something different in store for me with the third one.
All in all, Wishmaster 2 is just a fair sequel. I thought for sure that this one would be much bloodier and crazier than the first, but alas, I was disappointed. Even though I'm probably still going to watch them out of curiosity, I can't believe they still went ahead and made two more movies from this. Fingers crossed that something good happens in one of them.