E-Coin Castle
The World-e Castle is an area found only in Super Mario Advance 4: Super Mario Bros. 3, and not in previous versions of the game. The castle is of unknown origin, although it appears to have been built at the same time as the rest of World-e.
The castle's main purpose appears to be as a museum for the e-Coins that Mario and Luigi may find in certain levels scanned through an e-Reader, with eight spaces on 1F. Once a card containing an e-Coin is scanned, its frame will have an indention and the level number in the white space below.
While only eight e-Coins were ever released (filling 1F), a total of 24 appear to have been planned – the game has sprites and data for two more floors to be accessed once cards containing a 9th/17th e-Coin are scanned, with the player switching floors using L and R.
From left to right, the coins of 1F are displayed as follows – Super Leaf, Starman, Toad, Mario, Princess Peach, Luigi, Mushroom, Fire Flower. Only the Super Leaf, Starman, and Mushroom could be collected by American players.
