Bowser Jr. Showdown
From the Super Mario Wiki
Bowser Jr. Showdown, or Meringue Clouds-Airship, is the final course of Meringue Clouds in New Super Luigi U. It is unlocked by completing Ludwig's Block-Press Castle and its own completion unlocks Magma Moat.
The player will hop up onto a cloud that will move when they land on it. Some Parabombs and Brick Blocks are ahead. Some more Brick Blocks will be moving up and down. Some Brick Blocks, Cannons and a Red Ring appear before a Cannon Pipe which will send the player onto the actual airship. There, they will encounter Cannonballs, Cannons, a POW Block, Bob-ombs, and a Cannon Pipe which leads to Bowser Jr.. They will be in his Junior Clown Car, and it will grow boxing gloves, which can crack the blocks. After the player jumps on him or throws Bob-ombs at him three times, he will fall. The player character(s) will celebrate, then the blocks will fall, along with the character(s). Bowser Jr. will command the fist to crush them, but they run out of the way, destroying the airship instead.
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