Metal-Head Mario Can Move!

Metal-Head Mario Can Move! is the third mission of the Hazy Maze Cave in Super Mario 64 and Super Mario 64 DS, though it is renamed Metal-Head Wario Can Move in the latter due to Wario being the only one who can turn metal. The mission involves using the Metal power-up to activate a Purple Switch underwater.

Layout
From the start of the level, the player has to take the path on the left and make their way to the Underground Lake, like in the first mission. Once the player reaches the cavern, they need to hit the green block (or a red one as Wario in the DS version) to turn into Metal form. Once the player has turned to metal, they need to quickly follow the path into and under the water that leads to a Purple Switch (although the switch can be pressed with a well-timed Side Somersault into a Pound the Ground attack or Triple Jump). Pressing the switch opens the nearby gate blocking the door into the Abandoned Mine. The Power Star rests at the end of the mine, and the player needs to do a couple of Long Jumps to cross the gaps to reach it. Alternatively, Luigi can backward-somersault to reach the end of the mine, Mario can wall-kick to get there, and Yoshi can flutter-kick to get there.