This movie is a campy trudge with bad special effects (even for the time) and only a few chuckle-worthy jokes. It’s not interesting enough to pass for sci-fi or fantasy, not scary enough to pass for thriller or horror, and not funny enough to pass for adventure or comedy. It’s saved from truly awful territory by the charisma of the actors that seem to take everything with a grain of salt. Just watch Underworld or Turner and Hooch or any of the Lethal Weapon movies or Supernatural instead.
Closest comparison: It’s like an episode of Supernatural by way of Lethal Weapon.
Setting: Buddy Cop
Plot: Detective
Tone: Comedy