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Ludwig's Clockwork Castle is the castle and the ninth level in Meringue Clouds in the game New Super Mario Bros. U. It is not only the last main course in Meringue Clouds, but the last 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.




  • Fire Bros.
  • Sledge Bros.
  • Bony Beetles
  • Big Dry Bones
  • Amps
  • Ludwig von Koopa (Boss)

Star Coins

  • Star Coin 1: After the first Fire Bro, within a coin-filled shaft.
  • Star Coin 2: Shortly after the first Star Coin, there's a POW Block which can only be reached by bouncing off the Sledge Bro below. Hitting the POW Block drops the second Star Coin.
  • Star Coin 3: Before the boss door, occasionally hidden by the large geared platform.
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