Knot-Wing the Koopa's Sky Fort

Knot-Wing the Koopa's Sky Fort is the fourth level of World 6 in Yoshi's Woolly World.

Layout
The level begins with an array of Bill Blasters, followed by some Koopa Paratroopas, and a Winged Cloud that summons many balloons for Yoshi to ride, up to a door and the first checkpoint. Yoshi must then traverse some Number Platforms while avoiding more Koopa Paratroopas and Bullet Bills. The segment leads to more Bill Blasters, along with many edible walls and the door leading to the second checkpoint. Another balloon rise follows, followed by a door leading to a platform rise and the boss door.

Smiley Flowers

 * Smiley Flower 1: Just behind a movable wall at the end of the balloon area before the first checkpoint.
 * Smiley Flower 2: Immediately after the second Wonder Wool, Yoshi must hit a Winged Cloud to reveal a platform leading to a warp pipe. Inside the secret room, Yoshi must throw yarn balls to hit two Winged Clouds and the Smiley Flower.
 * Smiley Flower 3: Behind an edible wall just before the door leading to the second checkpoint.
 * Smiley Flower 4: In a hidden Winged Cloud in the middle of the second balloon rise.
 * Smiley Flower 5: Near the end of the platform rise just before the boss door. Yoshi can follow the bead trail to easily collect it.

Wonder Wools

 * Wonder Wool 1: Just to the left of the balloon area just after the start of the level.
 * Wonder Wool 2: During the Number Platform segment, Yoshi must land on a Number Platform with an exclamation circle, then flutter jump to reach the Wonder Wool.
 * Wonder Wool 3: In a Winged Cloud between the second and third edible walls.
 * Wonder Wool 4: Just before the second balloon rise, Yoshi must enter a warp pipe on the right. Inside the hidden room, Yoshi must kick a Koopa shell, then hit an exclamation circle and receive the Wonder Wool.
 * Wonder Wool 5: In a Winged Cloud at the end of the second balloon rise.

Collecting all of the Wonder Wools knits Bubblegum Yoshi back together.

Enemies

 * Bullet Bills
 * Koopa Paratroopas
 * Bull's-Eye Bills
 * Knot-Wing the Koopa (boss)