E-Coin

e-Coins are rare types of coins found only in World-e of Super Mario Advance 4: Super Mario Bros. 3. Fairly well hidden, only three of the eleven levels released outside of Japan have e-Coins.

Each e-Coin features a different image on one side; the other side of each e-Coin shows the e-Reader "e". Each e-Coin can only be collected once by Mario or Luigi before displaying in the World-e Castle, where they reside in individual frames with their level of origin underneath.

There are eight frames and eight e-Coins, but they appear to serve no purpose.

e-Coins and levels

 * Mushroom e-Coin: Vegetable Volley
 * Super Leaf e-Coin: Doors o' Plenty
 * Starman e-Coin: The ol' Switcheroo
 * Toad e-Coin: Ice Dungeon
 * Mario e-Coin: Caped Escape
 * Princess Peach e-Coin: Koopaling Confusion
 * Luigi e-Coin: Rich with Ropes
 * Fire Flower e-Coin: Puzzling Pipe Maze