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Newer Super Mario Bros. Wii
Newer Super Mario Bros. Wii Plus
Toxic Fortress
Game Newer Super Mario Bros. Wii
Level number D-Fortress.png
Time 500
World Crystal Caves
Level type Fortress
Enemies Big Thwomps
Dry Bones
Piranha Plants
Game Progression
Previous level (D-3) Spine Springs
Next level (6-3) Fog Cemetery

Toxic Fortress (or World D-Fortress.png) is the fortress and the fourth and final level of Crystal Caves in Newer Super Mario Bros. Wii. It takes place in an underground fortress full of poison water and falling walls. No boss is fought at its end.

Toxic Fortress is unlocked by completing Spine Springs. Completing it will unlock Fog Cemetery in Pumpkin Boneyard.

Star Coins

  • Star Coin 1: Activate the switch before it's obscured by the poisoned water to reach the coin.
  • Star Coin 2: Before the checkpoint, quickly reach the star coin before the platform obscures it.
  • Star Coin 3: You'll need to activate the Yellow, Green, and Red Switch Palaces to access the warp pipe before the flagpole. Once inside, watch out for the spike balls and use the empty platform to reach it.



Newer Super Mario Bros Wii World D-Toxic Fortress