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Newer Super Mario Bros. Wii
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Formidable Fortress
Game Newer Super Mario Bros. Wii
Level number B-Fortress.png
Time 500
World Mini-Mega Island
Level type Fortress
Enemies Big Goombas
Big Podoboos
Big Spinies
Big Thwomps
Dry Bones
Mega Podoboos
Mega Spinies
Mega Thwomps
Micro Porcupuffers
Game Progression
Previous level (B-4) Cheepcheep Creek
Next level (3-6) Bubble Basin

Formidable Fortress (or World B-Fortress.png) is the fortress and the fifth and final level of Mini-Mega Island in Newer Super Mario Bros. Wii. It takes place in a lava-filled fortress with eventually segues into a water-filled outdoor section. No boss is fought at its end.

Formidable Fortress is unlocked by completing Cheepcheep Creek. Completing it will unlock Bubble Basin in Mushroom Peaks.


The first half of the level takes place in a fortress filled with Thwomps and Skewers. The second half of the level takes place outside in a plains with many big enemies, with a bit of the fortress ruins lying around. There is no boss in this level, as with all fortresses in the game.

Star Coins

  • Star Coin 1: Before the first and only Mega Skewer, find two invisible Question Blocks above four Brick Blocks to find a hidden alcove in the ceiling containing a Warp Pipe. Once inside, just jump for it.
  • Star Coin 2: Once outside the fortress, look for a hidden alcove above the Warp Pipe to find another Warp Pipe above. Once back in the fortress, just jump for it.
  • Star Coin 3: After you reach the exit Warp Pipe, carefully keep going right. This will lead you to the Star Coin.




Newer Super Mario Bros. Wii B-Fortress Formidable Fortress Star Coins


Name Music Origin Area played
Castle Original song. Throughout