World 6-Castle (New Super Mario Bros. Wii)

 is the castle of World 6 in New Super Mario Bros. Wii.

Layout
The level begins near a pendulum platform with ? Blocks above it, one of which contains a power-up. More pendulums follow, with Lava Bubbles found jumping out of the lava. Dry Bones on a row of Brick Blocks are found above some Lava Bubbles and platforms. More pendulums follow, along with Spike Balls. The midway point is found at the end of the area, along with a Warp Pipe leading to the next section. Through the Warp Pipe, a Lava Bubble is found, along with a ? Block containing a power-up. Metal platforms are found moving in the lava, with Spike Balls falling from a spiked platform above. A Star is found in a Hidden Block above a Brick Block. More pendulum platforms are found, along with some Big Dry Bones. A ? Block containing a Fire Flower is found above a Hidden Block, followed by the boss door.

The player faces Morton Koopa Jr. again in this castle. The room's floor is composed of six stone pillars, which Morton uses in his offensive tactics. When Magikoopa casts his magic, at first nothing looks different except the stone pillars have slightly lowered. When he gets close enough to a player, he jumps and Ground Pounds, causing the pillars on opposite sides of him to shoot up to the ceiling, which kills the player if they get crushed. Morton also slides in his shell when hit, trying to hit players. Unlike his tower battle, Morton does not use his magic and his ground pounds do not stun players who are on the ground. Upon Morton's defeat by the third hit, the key to leave the castle appears.

Star Coins

 * Star Coin 1: The first Star Coin floats over a row of Brick Blocks with a Dry Bones on every one. The easiest way to obtain it is to get an Ice Flower, freeze a Dry Bones, then throw it across the row of Brick Blocks, killing all of the Dry Bones and getting the Star Coin.
 * Star Coin 2: The second Star Coin is floating high over the swinging platform with four ? Blocks and a Spiked Ball. Mario and co. must get on top of one of the ? Blocks and jump from it to the Star Coin.
 * Star Coin 3: The third Star Coin is just before the door leading to Morton. Mario and co. must go to the right edge of the final swinging platform, wait for the platform to swing all the way to the right, and jump for the Star Coin.