Battle Fort is a multiplayer level and an extra level that was added exclusively to Super Mario 64 DS. Note that in the main adventure, the level was referred to as The Secret of Battle Fort.
The entrance to the level is in the courtyard, underneath a Brick Block. As Yoshi cannot destroy blocks, either Mario, Luigi or Wario must enter instead.
The level consists of two main floors, the bottom of which is patrolled mainly by Heave Hos and Big Steelies. In adventure mode, the player must collect five Silver Stars to earn a Power Star. Template:SM64 Items and Courses