Editing Ludwig's Clockwork Castle

{{about|the level in ''[[New Super Mario Bros. U]]''|the board in ''[[Mario Party 6]]''|[[Clockwork Castle]]|other uses|[[Meringue Clouds-Castle]]}}
{{level infobox
|image=[[File:NSMBU Ludwig's Clockwork Castle Screenshot.jpg|250px]]
|code={{world|7|castle}}
|world=[[Meringue Clouds]]
|game=''[[New Super Mario Bros. U]]''
|powerup=[[Ice Flower]]
|limit=500 seconds
|boss=[[Ludwig|Ludwig von Koopa]]
|before_alt=[[Spinning Spirit House|**]]
|before=[[Snaking above Mist Valley|<<]]
|after=[[Boarding the Airship|>>]]
|secret=
}}
'''Ludwig's Clockwork Castle''', or '''{{world|Clouds|castle}}''', is the [[castle]] course of [[Meringue Clouds]] in ''[[New Super Mario Bros. U]]''. It is not only the last main course in Meringue Clouds but also the last [[Koopalings|Koopaling]] castle in the game. It is unlocked via completion of [[Snaking above Mist Valley]] or via the secret exit of [[Spinning Spirit House]], and its own completion unlocks [[Boarding the Airship]].
==Layout==
[[File:Ludwig's Clockwork Castle.png|left|thumb|[[Ice Mario]] in Ludwig's Clockwork Castle]]
The level begins near a moving platform operated by gears, with a [[? Block]] above it. Platforms with [[Bony Beetle]]s on them are found, with more moving platforms located in between them. A [[Mega Dry Bones|Big Dry Bones]] and a [[Fire Bro]] are found. Above the Big Dry Bones are two ? Blocks. There is a [[Hidden Block]] between them that contains a [[1-Up Mushroom]]. A row of [[Donut Block]]s is found, along with multiple moving platforms that can crush the player when they move against each other. A Bony Beetle is found prior to another moving platforms and a [[Sledge Bro]]. A [[Checkpoint Flag]] is found next to a platform with a Bony Beetle and another ? Block. A section containing to platforms moving under low ceilings, with [[Amp]]s on either side a Sledge Bro and a [[Red Ring]] in the middle. A Big Dry Bones can then be found on a row of Donut Blocks. There is a yellow [[Warp Pipe]] on the ceiling that takes Mario to a room with a moving platform and a [[? Switch]] that produces coins. A platform with a Fire Bro follows. A large moving platform is then found, along with a Sledge Bro and two Amps. The boss door is found at the end of the area.
[[File:MarioLudwigNSMBU.png|left|thumb|[[Mario]] battling Ludwig von Koopa]]
Ludwig von Koopa is the boss of the castle, with his boss arena taking place on the crow's nest, like [[Roy Koopa|Roy's]] boss arena. In battle he levitates in the air while making two duplicates of himself, and all three blast fireballs at Mario before dropping onto the ground. If the duplicate is jumped on, it simply disappears. [[Fireball]]s do not affect them. One way to find out which Ludwig is the real one is to see which one lands last, and then jump on that one. Also, the duplicates only fire two fireballs at a time each, while Ludwig fires three. When the fight starts off, after shooting their fireballs, they disappear before landing. After the first stomp, the duplicates do not disappear, making it a little harder on which is the real Ludwig. After the second stomp, not only do Ludwig and his duplicates shoot faster, they also swap positions. After the third stomp, Ludwig is defeated.

Additionally, during the boss battle, the tornado and a silhouette of [[Peach's Castle (world)|Peach's Castle]] and Bowser's airship flying around it can be seen.
{{br}}

==[[Star Coin]]s==
{|class="wikitable" style="text-align: center"
|-
!Image
!Location
|-
|[[File:NSMBU 7-C Coin 1.jpg|200px]]
|After the first [[Fire Bro]], the first Star Coin is found within a [[coin]]-filled portion of the ceiling.
|-
|[[File:NSMBU 7-C Coin 2.jpg|200px]]
|Shortly after the first Star Coin, there is a [[POW Block]] which can be reached by bouncing off the [[Sledge Bro]] below. Hitting the POW Block drops the second Star Coin.
|-
|[[File:NSMBU 7-C Coin 3.jpg|200px]]
|The third Star Coin is found before the boss door, occasionally hidden by the large geared platform.
|}
{{br|left}}

==Enemies and obstacles==
{{number of enemies
|image1=[[File:NSMBU Bony Beetle Artwork.png|50px]]
|name1=[[Bony Beetle]]
|count1=6
|image2=[[File:NSMBU Asset Model Dry Bones.png|50px]]
|name2=[[Mega Dry Bones|Big Dry Bones]]
|count2=2
|image3=[[File:NSMBU Fire Bro Artwork.png|50px]]
|name3=[[Fire Bro]]
|count3=2
|image4=[[File:NSMBU Sledge Bro Screenshot.png|50px]]
|name4=[[Sledge Bro]]
|count4=3
|image5=[[File:Amp NSMBU model.png|50px]]
|name5=[[Amp]]
|count5=4
|image6=[[File:LudwigNSMBU.png|50px]]
|name6=[[Ludwig|Ludwig von Koopa]]
|count6=(boss)
}}

==Names in other languages==
{{foreign names
|Jap=ルドウィッグの レールブロックの城
|JapR=Rudowiggu no Rēru Burokku no Shiro
|JapM=Ludwig's Castle of Rail Block
|Fre=Château Rouages de Ludwig
|FreM=Ludwig's Cog Castle
|SpaA=El Castillo Mecánico de Ludwig
|SpaAM=Ludwig's Mechanical Castle
|SpaE=El Castillo Bloquerraíl de Ludwig
|SpaEM=Railblock Ludwig´s Castle
|Dut=Ludwigs luchtkasteel
|DutM=Ludwig's air castle
|Ger=Ludwigs Uhrwerk-Festung
|GerM=Ludwig's Clock Castle
|Ita=Castello meccanico di Ludwig
|ItaM=Ludwig's mechanical castle
|Por=Castelo Mecânico do Ludwig
|PorM=Ludwig's Mechanical Castle
|Rus=Людвиг и его замок с механизмами
|RusR=Lyudvig i yego zamok s mekhanismami
|RusM=Ludwig and his castle with mechanisms
|Kor=루드윅의 레일블록 성
|KorR=Rudeuwik-ui Reilbeullok Seong
|KorM=Ludwig's Rail Block Castle
|Chi=洛德威格的滑轨砖块城堡 (Simplified)<br>洛德威格的滑軌磚塊城堡 (Traditional)
|ChiR=Luòdéwēigé de Huáguǐ Zhuānkuài Chéngbǎo 
|ChiM=Ludwig's Slide-Rail Block Castle
}}

==Level map==
[[File:NSMBU Ludwig's Clockwork Castle Map.png|600px|thumb|left|]]
{{NSMBU levels}}
[[Category:Castles]]
[[Category:Sky areas]]
[[Category:New Super Mario Bros. U levels]]
[[de:Ludwigs Uhrwerk-Festung]]
[[it:Castello meccanico di Ludwig]]