World 5-Castle (New Super Mario Bros. 2)

 is the castle of World 5 in New Super Mario Bros. 2. The boss of this castle is Ludwig Von Koopa.

At the Boss Room, Mario or Luigi must use the cannon. Then when they fight Ludwig von Koopa, he hovers to a rope. Whichever rope he goes to, the player must hit him with the cannon pointing at that rope. He must be hit 3 times to be defeated.

Star Coins

 * Star Coin 1: Not too far before the checkpoint, there's a hidden red pipe that can be reached with hidden blocks. The red pipe takes the player directly to the star coin.
 * Star Coin 2: Immediately after the checkpoint, The star coin is floating over the lava. The player must wait for the grating to rise from the lava to get it.
 * Star Coin 3: Once the vertical rectangular grating sinks into the lava, the player should wait until they are able to grab the third star coin.