Blast Away the Wall

Blast Away the Wall is the sixth mission of Whomp's Fortress in Super Mario 64 and its remake, Super Mario 64 DS. In Super Mario 64, this is the course's final mission. Its objective is to obtain the Power Star inside a wall.

Layout
The Power Star is hidden inside the terrain, specifically the corner of the wall next to the rotating bridge and the sleeping Piranha Plant. The only intended means to release the Star is to break this corner, which can be achieved only by firing the player character into it from the cannon. (However, there are setups to collect the Star by ledge-grabbing through the unbroken wall.) In Super Mario 64 DS, a short animation then shows the Power Star emerging from the wall. After that, the player can follow the path up and easily collect the Power Star. The wall to the left of the one containing the Star is similarly destructible, though nothing is inside it.

It should also be noted that in Super Mario 64, after hitting one of the destructible walls, Mario will lose one wedge of health. He may also take small fall damage if the collision is too high up. In Super Mario 64 DS, no wedges of health are lost after the player hits the wall.

Trivia

 * In the Super Mario Galaxy 2 recreation of Whomp's Fortress, the Throwback Galaxy, the walls that are blasted away in this mission are already destroyed.