While Nintendo no longer sells Four Swords Anniversary Edition , and you cannot buy it via the eShop, the copyright is still active. Nintendo’s official stance (as stated in their legal FAQ) is that downloading ROMs of any game, even delisted or "abandoned" titles, is copyright infringement.
The Legend of Zelda: Four Swords Anniversary Edition The Legend of Zelda: Four Swords Anniversary Edition zelda four swords ds rom free
Searching for " The Legend of Zelda: Four Swords " for the DS is a bit unique because the game was originally a limited-time digital release rather than a standard retail cartridge. Key Facts About the DS Version The Anniversary Edition : The version specifically for the DS (and 3DS) is titled The Legend of Zelda: Four Swords Anniversary Edition Availability While Nintendo no longer sells Four Swords Anniversary