Editing Grinding-Stone Tower

{{Levelbox

|image=[[File:NSMBU T-GrindingStoneTowerSE.Still004.jpg|250px]]

|code=World 6-[[File:Fort Icon.png|18px]]

|game=''[[New Super Mario Bros. U]]''

|coinlimit=

|beforealt=

'''Grinding-Stone Tower''', or '''{{world|Rocky|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 the [[Boom Boom (species)|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]].

The level begins below a platform with a [[? Block]] and a nearby pipe spawning [[Grrrol]]s. A [[Bony Beetle]] is found, along with two [[Warp Pipe]]s 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 Block]]s 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 contain [[coin]]s 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 [[Grrrol (big)|big 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 big Grrrols are found, followed by a platform with a Bony Beetle and the boss door on it.

A Boom Boom makes his species' last appearance as the boss of the tower. [[Kamek|Magikoopa]] swoops in and cause the Boom Boom's arms to turn into wings, which allows him to fly and dive into the player.

==Star Coins==

*'''Star Coin 1''': A mini [[Warp Pipe]], that leads to the area with the first [[Star Coin]], is present at the beginning of the course, to the left. [[Mini Mario (form)|Mini Mario]] is required for this Star Coin.

*'''Star Coin 2''': The second Star Coin is hidden within a wall to the right, after a series of Grrrols.

*'''Star Coin 3''': Another mini Warp Pipe, that 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==

==Enemies==

*[[Grrrol]]s

*[[Grrrol (big)|Big Grrrol]]s

*[[Bony Beetle]]s

|JapM=Rumbling Grrrol Fortress

|PorE=Torre Grrroda

|PorEM=Grrrol Tower

[[File:NSMBWIIU_62a_map.jpg|400px|thumb|left|]]

{{NSMBU}}

{{NSMBU Levels}}

[[Category:New Super Mario Bros. U Levels]]