Hammer Bro Hideout is the 8th secret level in the Mushroom Kingdom. It is a hideout for the Hammer Bros., Fire Bros., and Boomerang Bros. In this level, you must defeat all the Bros. in the area you are in, so that a flashing door appears. This flashing door will take you to the next area. There are a total of eight different areas the player must make their way through before completing the level.