Shiftier Boo Mansion
Shiftier Boo Mansion, or World 
Flower-6, is the sixth level of World Flower in Super Mario 3D World. This level is unlocked by completing Faster Fort Fire Bros., and it's own completion unlocks Blast Block Skyway.
Layout
As the name suggests, the course is a more difficult version of World 3-3: Shifty Boo Mansion, with the colors drastically muted. The level starts in a hallway with a Big Boo chasing the player. After the hallway, there are two sets of stairs, one going downwards and one upwards. The former taking the player to a dead end with a bunch of Boos and another Big Boo. And the latter taking the player to a balcony, after passing few Conveyor-carpets and avoiding another Big Boo. Outside, the player will find a Fake Goal Pole which if touched will spawn three big boos. After entering the door at the end of the balcony, the player moves to another hallway with another Big Boo chasing them. This time going left and encountering more Conveyor-carpets with some of them going slightly upwards and downwards. Afterwards the player can enter another balcony with more Big Boos and some Peepas. After a drop-off, the player sees another fake goal pole and after another drop-off, they finds a Warp Box which takes them to the beginning of the balcony again. The correct path is hidden, the player needs to go past the first drop-off where the 2nd fake goal pole was encountered. They then need over the railing in the bottom left corner to some invisible clouds and in a Warp Box that takes them to a similar balcony layout, however the real goal pole is found at the end of that balcony.
Green Stars
- Green Star 1: To the left of the start of the level, behind the Big Boo.
- Green Star 2: Just past a blank painting in the first area, if the player jumps on the couch, the couch will begin to float and move to the right, to some clouds that contain the second Green Star.
- Green Star 3: At the end of the third area, behind a Big Boo, and on top of constant moving and falling platforms.
