Shiftier Boo Mansion

Shiftier Boo Mansion, or , is the sixth level of World Flower in Super Mario 3D World and its Nintendo Switch port Super Mario 3D World + Bowser's Fury. This level is unlocked by completing Faster Fort Fire Bros., and its own completion unlocks Blast Block Skyway.

Layout
As the name suggests, the course is a more difficult version of 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 takes the player to a dead end with a bunch of Boos and another Big Boo; the latter takes the player to a balcony, with a few conveyor-carpets and another Big Boo. Outside, the player finds a fake Goal Pole, which, if touched or approached, spawns 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. The path goes left and contains 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; yet another drop-off past that, a Warp Box can be found, and it takes the player to the beginning of the balcony again. Unlike in the original level, the correct path is hidden; the player needs to go past the first drop-off where the second fake Goal Pole was encountered. Going over the railing in the bottom left corner leads them to some invisible clouds and a Warp Box that takes them to a similar balcony layout, where the real Goal Pole is found at the end.

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.

Names in other languages
Hin und her im Gruselhaus