This article is about the level in Newer Super Mario Bros. Wii. For other levels of the same name, see Bowser's Castle.

Don't let its name fool you. This is a false final level. The real final level is Bowser's Keep.

Bowser's Castle is the 1st castle level in Koopa Planet. It's unlocked via completing 8-4: Molten Airship, and finishing it will unlock 8-Train: Underground Railroad.


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