World 2-Castle (New Super Mario Bros. 2)
World 2-Castle is the castle of World 2 in New Super Mario Bros. 2. The level is spent nearly entirely on a platform that only moves if the player is stepping on it. Fireballs attempt to lurch out and hurt the player in this level.
The player starts out on a flat surface, where the Switch Lift is docked on the lava. After jumping on the moving platform, a few Buzzy Beetles are encountered, moving around on rotating Brick Block structures. When the player approaches the structures, they fold out at a 90-degree angle, dropping the Buzzy Beetles onto the platform. Soon after, Thwomps appear. The player can bait these Thwomps into crashing into lava, destroying them. Shortly after, the Checkpoint Flag appears along with two ? Blocks, one of which has a Super Leaf inside. Another Switch Lift is docked here. The Switch Lift quickly approaches a quad of fireballs that travel in an arch shape and the second Star Coin rotating above. The level's Red Ring is located directly after this, floating above a set of rotating Brick Block structures. Shortly after, two sets of fireballs and a red pipe appear on-screen. A few more sets of fireballs is followed by a vertical section of coins with Hidden Block containing a 1-Up Mushroom in between them. The player can then approach the boss door; a Hidden Block containing a Super Leaf is next to the door.
The boss is Iggy Koopa. Unlike other Koopaling battles in this game, he is riding around in his Chain Chomp carriage. The battle plays similarly to that of his castle battle in New Super Mario Bros. Wii. The Chain Chomp carriage travels on a rectangular grid layout and can exit the room from the top and bottom. Some sand will appear upon entering in the opposite direction. The player must use the four smaller blue platforms and stomp on Iggy's head three times to defeat him.