Red Coin

The Red Coin is a currency item added by Mubble. It can be obtained by activating a ? Block or by killing a Toad. Its monetary value is equal to 5 coins; a Red Coin can be crafted into 5 Yellow Coins, while 2 Red Coins can be crafted into 1 Blue Coin.

It first appeared in Super Mario Bros. 3 (1988).