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, which one of them contain a Penguin Suit. To progress, Mario must enter a Warp Pipe. Mario will find a Ice Snake Block which he must use to avoid the Bottomless Pit and reach the end of the castle. Falling icicles will fall in the Ice Snake Block, and Mario will find spikes and three circus balls. The Ice Snake Block will lead Mario to a Warp Pipe. After entering the Warp Pipe, Mario will find two Pipes which spawns Bob-Ombs, Bob-Ombs frozen in ice cubes, and another Ice Snake Block. The Ice Snake Block will lead Mario to the door leading to the battle with Lemmy Koopa. Before the door, there's a Warp Pipe which Mario can access to obtain a Penguin Suit using circus balls to bounce onto the ? Block. When Mario enters in the door, he will find Lemmy Koopa again. Kamek turns 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 a little bit. After the third hit, Lemmy will fall and the key to unlock World 4 will appear.

Star Coins

 * Star Coin 1: The Star Coin is located above some Donut Lifts along the first Ice Snake Block. The player has to use the circus balls to bounce onto the donut lifts.
 * Star Coin 2: In the first section of the third area with many Bob-ombs coming out of green pipes. The player needs to destroy the ice blocks with the Bob-ombs to get the Star Coin.
 * Star Coin 3: Along the second Snake Block, there are some Donut Lifts along its path. The Snake Block will block the Donut Lift with the Star Coin. The player has to jump ahead to the Star Coin, continue jumping so they won't fall, and jump back onto the Snake Block when it returns to the bottom.

Enemies

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