Golden... Ninja? vert der ferk

Yes, that is the Golden Bat, or Ogon Bat, if you prefer.  Nowhere in this movie is he referred to as a "ninja" of any kind.  Nor does he use ninjitsu weapons either.

This is what the movie was called when it was released, along with more cool films, on Blu Ray a few years ago.  Still makes no sense to me.