Grinding-Stone Tower

This article is about Grinding-Stone Tower, a level in New Super Mario Bros. U. For other uses, see Rock-Candy Mines-Tower.

Level
Grinding-Stone Tower
Level code	World 6-Tower
World	Rock-Candy Mines
Game	New Super Mario Bros. U (Deluxe)
Primary power-up	Ice Flower
Time limit	500 seconds
Boss	Boom Boom
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Grinding-Stone Tower, or Rock-Candy Mines-Tower, is the first Tower of Rock-Candy Mines in New Super Mario Bros. U. This level is unlocked via completion of Porcupuffer Falls. Defeating Boom Boom in this course unlocks a passage to Waddlewing's Nest and Light Blocks, Dark Tower, and the tower's secret exit unlocks Thrilling Spine Coaster.

Layout

Mario in the battle with winged Boom Boom.

The level begins below a platform with a ? Block and a nearby pipe spawning Grrrols. A Bony Beetle is found, along with two Warp Pipes that move upwards and downwards, allowing the player to reach the next platform. More Grrrols are spawned nearby, and a platform with a Bony Beetle and two Brick Blocks is found. A moving Warp Pipe is found, and a hidden opening next to it allows the player to reach a ? Block containing a Mini Mushroom. An opening containing coins is found, allowing the player to avoid nearby Grrrols. After passing by the Grrrols, another sloped platform with a Bony Beetle on it is found, followed by two moving Warp Pipes. A series of platforms with Mega Grrrols on them is found, leading to the Checkpoint Flag. A group of Warp Pipes is found, with a ? Block above it and Grrrols spawning from the right. More sloped platforms and Grrrols are found, and a hidden Red Ring is found in a wall. After another platform, two ? Blocks are found, followed by multiple moving Warp Pipes acting as platforms and Grrrols. Two Mega Grrrols are found, followed by a platform with a Bony Beetle and the boss door on it.

Boom Boom makes his last appearance in the game as the boss of the tower. Magikoopa swoops in and causes Boom Boom's arms to turn into wings, which allows him to fly and dive into the player.

Star Coins

Image	Location
	A small pipe that leads to the area with the first Star Coin is present at the beginning of the course, to the left. Mini Mario is required for this Star Coin.
	The second Star Coin is hidden within a wall to the right, after a series of Grrrols and just before the Checkpoint Flag.
	Another small pipe which leads to the area with the third Star Coin is present at the end of the course, to the right. As with the first Star Coin, Mini Mario is required to reach this Star Coin.

Secret exit

The small pipe leading to the third Star Coin and the secret exit

Immediately after the third Star Coin is a Warp Pipe that leads to the secret exit. It opens the path to Thrilling Spine Coaster.

Enemies and obstacles

Image	Name	Count
	Grrrol	(infinitely spawned)
	Mega Grrrol	12
	Bony Beetle	4
	Boom Boom	(boss)

Names in other languages

Language	Name	Meaning	Notes
Japanese	ごろごろゴローのとりで[?] Gorogoro Gorō no Toride	Fortress of Rolling Grrrols
Chinese	滚动刺滚轮的堡垒 (Simplified) 滾動刺滾輪的堡壘 (Traditional)[?] Gǔndòng Cì Gǔnlún de Bǎolěi	Fortress of Rolling Grrrols
Dutch	Grrruwelijke Grrrol-toren[?]	Brrrutal Grrrol-tower
French (NOE)	Tour Mabroule[?]	Crazy Tower
German	Grrroll-Turm des Grauens[?]	Grrrol's terror tower
Italian	Torre della Pietra stridente[?]	Rough Stone Tower
Korean	데굴데굴 데구르 요새[?] Deguldegul Degureu Yosae	Rolling Grrrol Fortress
Portuguese	Torre Grrroda[?]	Grrrol Tower
Russian	Башня шипокатов[?] Bashnya shipokatov	Grrrols castle
Spanish (NOA)	La Torre de Don Machucón[?]	Grrrol's Tower
Spanish (NOE)	La terrible Torre Cróncher[?]	Terrible Grrrol Tower

Level map