Actually, this is one I knew about a long time ago, but I didn't remember it until I just had it happen again today:
Another glitch for this game is that if you keep pausing and unpausing, there is a chance the game will stop playing the background music. If you pause and unpause again, the music will resume. I think the reason this happens is because if you pause and unpause, you'll notice that the music starts over from the beginning again, as though it's being reloaded. I think what happens is that occasionally, the game might fail to reload the song.
If you get up to the Kelbeross boss in Ninja Gaiden with Jump & Slash, as soon as the battle begins, immediately use the Jump & Slash to kill the
dog on the left pedestal. This will sometimes cause the game to load a second set of dogs.
Another glitch for this game is that if you keep pausing and unpausing, there is a chance the game will stop playing the background music. If you pause and unpause again, the music will resume. I think the reason this happens is because if you pause and unpause, you'll notice that the music starts over from the beginning again, as though it's being reloaded. I think what happens is that occasionally, the game might fail to reload the song.
