JP Metal Slug question

Ok, just wondering if the Jap. metal slug series has blood? Does anything need to be done to the mvs? Or will the cart just have blood enabled? Joe

You will need to go to the soft dip settings and set the blood to red instead of grey for that game, providing the Nicad battery is OK it will remain on that setting each time you play the game.
Its nothing to do with the actual cart.