Key Coin

Key Coins are a special type of coin that first appear in Super Mario 3D World in Sunshine Seaside. Five Key Coins have to be collected to unlock locked Warp Boxes, similar to how Mario has to collect five Star Chips in the Super Mario Galaxy games to make Launch Stars appear. A counter on top of the screen shows how many Key Coins have been collected and how many are left. Collecting a Key Coin gives the player 1000 points.

Key Coins are found again in the Wii U version of Captain Toad: Treasure Tracker, where they are once again found in Clear Pipe Cruise.

In Super Mario Maker 2, Pink Coins take the form of pink-colored Key Coins in the Super Mario 3D World style. Additionally, Keys themselves resemble the one depicted on the sides of a Key Coin while in this style.