Super Mario 64/Cavern of the Metal Cap

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Super Mario 64 DS
This level was renamed Behind the Waterfall and the green ! switch is removed, but is otherwise still the same level.

The Cavern of the Metal Cap course is in the sixth level Hazy Maze Cave. Go to the Underground Lake, and ride Dorrie (the large blue sea monster creature) over to the platform in the corner with the double doors across from where you came from. When you get there, ground-pound while on Dorrie to make him lower his head and hop up onto the platform so you can enter the double doors into the Metal Cavern. The Metal Cap course is in the pool inside, similar to the entrance of Hazy Maze Cave.

Description: It's a long level with a very strong water current. Don't get sucked in to the water; you'll end up in the waterfall outside Princess Peach's castle into the moat.

Finding the Switch[edit]

At the start of the level you'll be encased in metal, so the water current will have no effect on you. Throughout this level are Sniffits that fire bullets at you when they see you. Stomp on them to get some coins. When you reach the flowing water in the cavern, make a left, not a right. There is a 1-Up Mushroom in the block by the waterfall, though. Hop from the small platforms in the current to the platform with the green Metal Cap Switch. Hop onto it and all of the green blocks will become solid. Now you can use the Metal Cap. Any time you use it, you become Metal Mario, invincible and unaffected by water in any way. You can even walk underwater without breathing!

8 Red Coins[edit]

A map of Cavern of the Metal Cap, with all the red coin locations marked out.
Super Mario 64 DS
It is recommended that you try this as Metal Wario, since there is a very strong water current.

4 coins are found around the platform at the end. Two are found on the platform, and two are found close to the Bob-omb buddy.

The first two red coins are in an alcove with a 1-Up Mushroom right before the platform with the Metal Cap Switch. The next two are beside the Metal Cap Switch. To get the last four red coins, break open a green block and grab the Metal Cap from it. Now as Metal Mario, hop into the water nearby the Metal Cap Switch platform to find the last four coins. Then, the star will appear right by the platform as well. Grab it before the Metal Cap wears off and you'll have another one of the castle's secret stars!

Super Mario 64 DS
A second power star can be found above the ? block in the platform at the end. You will need Mario to hit the block, then float upwards from that spot.

Please note: If the strong water current pushes you out of the level, then you will end up outside Princess Peach's Castle where the waterfall is. If you get the star, then you will end up outside the entrance to Hazy Maze Cave.