World 7-Castle (New Super Mario Bros. Wii)

 is the castle and last level of World 7 in New Super Mario Bros. Wii. The boss battle in this level is against Ludwig von Koopa.

Layout
In this level, there are numerous spiked pillars (forty in total, although there would be less if players were playing multiplayer) that the player will have to avoid. They all vary in size and speed. Sledge Bros. also make an appearance here. There is also a shortcut that will take the player directly to the boss door, but it can only be accessed by clearing World 7-6.

Ludwig von Koopa is fought again here. The fight takes place on three moving platforms which change height at times. Ludwig will fire four navy fireballs at a time, then jump to a nearby platform with flutter jumping.