World 8 (New Super Mario Bros. Wii)

World 8 (NSMB Wii) is the second to final world in New Super Mario Bros. Wii, the final one being an unexpected World 9 (NSMB Wii). World 8 consists of lava, volcanoes, dark clouds, and most important, Bowser. Although the second to final world, this world is the final part and conclusion of the story in the game. Once finishing this world, the story is finished and World 9 is unlocked.