Warp Box

Warp Boxes are square objects appearing in Super Mario 3D Land and Super Mario 3D World. Warp Boxes are orange, outlined clear boxes with exclamation marks on the sides.

Super Mario 3D Land
Warp Boxes first appear in Super Mario 3D Land. When Mario or Luigi run into a Warp Box, they are teleported to another Warp Box in another area, in a similar manner of Warp Pipes and Launch Stars.

In the early stages of the game, Warp Boxes were purple and some showed four diamonds as opposed to exclamation marks. However, the color was later given to Mystery Boxes. After the player comes out of a Warp Box, it may sometimes disappear, leaving Mario or Luigi with no way back.

Super Mario 3D World
Warp Boxes return in Super Mario 3D World, where they work just like they did in Super Mario 3D Land. There are also Warp Boxes that are trapped inside locked metal boxes, forcing Mario to get five Key Coins to make them available. Unlike in Super Mario 3D Land, the sound effects heard when entering and exiting a Warp Box is the same as when entering and exiting a Mystery Box from said game. When playing with multiple players, characters that do not enter the box a few seconds after one does are automatically pulled inside.

Captain Toad: Treasure Tracker
Warp Boxes have a very minor appearance in Captain Toad: Treasure Tracker, appearing only in the recreation of Clear Pipe Cruise.

Mario Party: Star Rush
Warp Boxes appear again in Mario Party: Star Rush as usable items in Toad Scramble and Balloon Bash. When used, they warp the player to the space of a rival.

Trivia

 * In the demo for Super Mario 3D Land, the warp box was purple, and it took the player to a bonus area.