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Smashing-Stone Tower, or Rock-Candy Mines-Tower is the tower level of Rock-Candy Mines in New Super Luigi U. It is unlocked when Porcupuffer Cavern is completed, and its completion unlocks Spike's Seesaws and Light-Up-Lift Tower.
The level starts in a tower with Grrrols and platforms that must be climbed up to progress. Two Grrrol generators are found on either side of the area. Two more Grrrol generators are in the section following, and Hidden Blocks below them must be hit in order to cause the Grrrols to destroy Brick Blocks blocking the path. 1-Up Mushrooms can be found in some of the Hidden Blocks. A large section of Brick Blocks follow, and is cleared out by two Dai Gorō. Pipe Cannons are found, and lead to the boss door where Boom Boom awaits. Magikoopa transforms Boom Boom's arms into wings prior to the battle. He must be hit three times in order to be defeated.
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