World 3-Castle (New Super Mario Bros. Wii)

 is the Castle level of World 3 in New Super Mario Bros. Wii. This is the first level to feature Bob-ombs.

Layout
The level starts with some ice cubes, several Dry Bones, and ? Blocks, one of which contains a Penguin Suit. To progress, Mario must enter a Warp Pipe. When he comes out, he will fall through some Donut Blocks, landing on an Ice Snake Block which he must use to avoid the Bottomless Pit and progress through the level. Mario must avoid falling Icicles and platforms with spikes. He will then find three circus balls, which the player can jump on to reach the first Star Coin. The Ice Snake Block will lead Mario to a platform with a Warp Pipe. After entering the Warp Pipe, Mario will find a Pipe which spawns Bob-ombs. Mario must use the Bob-ombs to break ice cubes, allowing him to access the second Star Coin and continue through the level. Mario will find more Bob-ombs which he can use to free another Ice Snake Block. He will then find the last star coin and a Red Ring. The Ice Snake Block will end at a Pipe leading to a secret area with a Penguin Suit. After the Pipe, Mario will find the door leading to the battle with Lemmy Koopa. Kamek makes Lemmy's circus balls bigger so it will be harder for Mario and co. to hurt Lemmy. Lemmy uses the same tactics he used during the Tower battle. After being hit twice, Lemmy's ball will further increase in size. After the third hit, Lemmy will fall and the key to unlock World 4 will appear.

Star Coins

 * Star Coin 1 (pictured): The first Star Coin, along with several other Coins, is floating above a row of Donut Blocks. Mario and co. should bounce off Lemmy's circus balls to reach the area.
 * Star Coin 2: The second Star Coin is at the very start of the third area, boxed in by big Ice Blocks. Mario and co. should destroy the Ice Blocks with Bob-ombs to make the Star Coin accessible.
 * Star Coin 3: The third Star Coin is surrounded by many rows of Donut Blocks and can be easily jumped to.

Enemies

 * Dry Bones
 * Bob-ombs
 * Boss: Lemmy Koopa