Screwtop Shroom

Screwtop Shrooms, formerly Mushroom Screws, are a type of Mushroom Platform found in the New Super Mario Bros. sub-series.

New Super Mario Bros. Wii
Mushroom Screws first appear in New Super Mario Bros. Wii. They have a screwtop on them which needs to be spun to activate the corresponding set of platform and make them move. They slowly move back in the direction they came from when the player is not spinning the corresponding screwtop. Only four of them appear in the entire game, specifically in World 1-5 just before the checkpoint.

New Super Mario Bros. U / New Super Mario Bros. U Deluxe
Screwtop Shrooms return in New Super Mario Bros. U and its remake, exhibiting the exact same behavior as in New Super Mario Bros. Wii. They only appear in Rising Tides of Lava, where they are far more common. Screwtop Shrooms are among the objects that do not return in in New Super Luigi U.