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Trouble in Shadow-Play Alley, or , is the fourth level of World Mushroom in Super Mario 3D World. It is unlocked after completing Deep-Black Jungle Drift, and it's own completion unlocks Gigantic Seasick Wreck.

Key Coins

 * Key Coin 1: Under the stairs leading to the second floor in the first area.
 * Key Coin 2: Guarded by two Hammer Bros. on the second floor.
 * Key Coin 3: Behind a set of sliding doors on the second floor, guarded by Goombas.
 * Key Coin 4: Behind a set of sliding doors on the third floor, guarded by a Hammer Bro.
 * Key Coin 5: Obtained by striking a gong blocked by a wall of Blurkers.

Green Stars

 * Green Star 1: In a Clear Pipe on the third floor, accessible only with a Fire Flower, as there's a spike ball inside the Clear Pipe.
 * Green Star 2: Obtained by collecting 8 Green Coins near the Checkpoint Flag.
 * Green Star 3: Inside a small area with piles of coins, accessible by a Warp Box shortly after the Checkpoint Flag.

Enemies

 * Goombas
 * Goomba Towers
 * Hammer Bros.
 * Boomerang Bros.
 * Fire Bros.
 * Blurkers
 * Flopters