Top Ten Hardest Final Levels in Mario Games

Ah, the Super Mario series. Its first game saved the gaming industry! However, it has had some extremely hard levels in its day. Here are some of the hardest final Mario levels ever. (Note: This includes both final Bowser levels and bonus stages.)
The Top Ten
1 Champion's Road (Super Mario 3D World)
2 The Perfect Run (Super Mario Galaxy 2)
3 Special 8-Crown (Super Mario 3D Land)
4 World 9-7 (New Super Mario Bros. Wii)

World 9-7 is not the final level of the game

5 Corona Mountain (Super Mario Sunshine)
6 World 8-Final Bowser (Super Mario 3D Land)
7 World 8-Bowser's Castle (New Super Mario Bros. Wii)
8 Tubular (Super Mario World)
9 Bowser's Fortified Fortress (Super Mario Galaxy 2)
10 Fate of the Universe (Super Mario Galaxy)
The Contenders
11 Darker Side (Super Mario Odyssey)
12 Wario's Castle (Super Mario Land 2: Six Golden Coins)
13 World Star-Castle (New Super Mario Bros. 2)
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