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e-Coins are a rare type of coin found only in World-e of Super Mario Advance 4: Super Mario Bros. 3. Only three 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 on one side. The other side of an e-Coin has the letter "e" on it. 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
- Super Leaf e-Coin: Doors 'o Plenty
- Starman e-Coin: The ol' Switcheroo