Warp Box (With Key)

Warp Boxes (With Keys) are objects appearing in a few games throughout the Super Mario series. In all games they appear in, they are locked Warp Boxes that must be unlocked in some way.

Super Mario 3D World / Super Mario 3D World + Bowser's Fury
Warp Boxes (With Keys) first appear in Super Mario 3D World and return in its remake, where they appear in a few levels. In all levels they appear in, the player must collect five Key Coins of an area to turn that area's Warp Box (With Key) into a regular Warp Box.

Super Mario Maker 2
Warp Boxes (With Keys) return in Super Mario Maker 2 exclusively in the Super Mario 3D World style. This time, they may be entered if the player has a Key in their possession. Their object limits are shared with those of regular Warp Boxes.

Captain Toad: Treasure Tracker
Exclusively in the Wii U version of Captain Toad: Treasure Tracker, a single Warp Box (With Key) appears in the level Clear Pipe Cruise, behaving as it did in Super Mario 3D World.