Cavern of the Metal Cap
In order to reach it, the player must follow almost the exact same procedure as in the level "Swimming Beast In The Cavern" in Hazy Maze Cave. Mario must first get on top of Dorrie's head, and then steer it over to the small patch of ground outside the double doors. Upon entering the double doors, Mario will be confronted with a short hallway, at the end of which is another pool (much like the one that is used to enter Hazy Maze Cave in the first place) which will transport Mario to the Cavern of the Metal Cap when entered.
The cave is decorated with large glittering crystals and has a stream running through the middle. The water is moving very fast and can sweep Mario out the cave's one-way exit (which will lead him to the waterfall outside Peach's Castle) if he is not careful. Upon entering the cave, Mario is automatically turned into Metal Mario and is therefore invulnerable to the stream's current. The only enemies that appear are Snufits and a Goomba (DS version). If the player hurries, they can quickly defeat the few of them guarding the Green ! Switch and press it. All the green ! Blocks in the game will then activate, granting access to the Metal Cap in later courses.
There are only two missions seen in this world.
There are eight Red Coins to be collected here, and several of them are just below a huge waterfall leading into the stream. The only way to reach them is by becoming Metal Mario/Wario. Once every Red Coin is collected, the Power Star will appear behind a small island near the waterfall at the other end of the cavern.
Star 2 (DS only)
Using Mario, the player must hit the ? Block by the waterfall to obtain a Power Flower. By floating upwards from that spot, they can find a Power Star up above.
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