Darkwing Bat

Contrary to what most gamers think, this boss does indeed have offensive abilities. First, it'll fly back and forth atop the screen, bobbing up and down, trying to whack anything within its long wingspan. Also, it will gather into either of the upper corners and begin flapping its wings wildly, creating strong winds that'll send the hero crashing into the walls. Very rarely, it will pull off a now-typical giant bat maneuver, twisting itself into a needle formation and trying to drill-attack you by flying in horizontally. If you let it live long enough, you'll find these to be true.