E-Coin

e-Coins are a rare type of coin found in only World-e of Super Mario Advance 4: Super Mario Bros. 3. Only two of the eleven levels that were released outside of Japan actually have their own e-Coin. e-Coins are fairly well hidden. Little is known about the e-Coins, except that each one is unique and features a different image. Each e-Coin can only be collected once before going on display in World-e's castle. They appear to serve no purpose other than bragging rights.

Known e-Coins and their levels

 * Mushroom e-Coin: Vegetable Volley
 * Starman e-Coin: The ol' Switcheroo