E-Coin

e-Coins are a rare type of coin found only in World-e of Super Mario Advance 4: Super Mario Bros. 3. Fairly well hidden, e-Coins were initially found in only three of the eleven levels released outside Japan.

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 be collected only once by Mario or Luigi before being displayed in the e-Coin Castle, where e-Coins reside in individual frames with their levels of origin underneath. Any e-Coins within blocks or under grass tufts are replaced by 1-Up Mushrooms.

There are eight frames and eight e-Coins, but they serve no purpose, besides display.

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