Battle Fort is an adventure course and a multiplayer course exclusive to Super Mario 64 DS.
The Battle Fort can be found in Princess Peach's Castle's courtyard underneath a brick. As Yoshi is unable to break the brick, only Mario, Luigi, or Wario is able to break the brick.
Battle Fort has two floors. The enemies in the course are Chuckyas, Heave Hoes, Goombas, Bob-ombs, and Big Steelies.
Star 1: The Secret of Battle Fort:Edit
There are five Silver Stars scattered around Battle Fort. Mario, Luigi, or Wario must collect all five of them to get a Power Star.