For those who may not be familiar, a ROM (Read-Only Memory) is a digital copy of a game that can be played on a computer or other device using an emulator. In the case of the Zelda Four Swords DS ROM, it's a digital version of the game that can be played on a PC or mobile device using a DS emulator.
You're looking for information on The Legend of Zelda: Four Swords for the Nintendo DS, specifically in ROM format. zelda four swords ds rom
: Improved sound quality and an expanded view range to match the DS's higher resolution screen. Emulation & Hardware Compatibility For those who may not be familiar, a
: Unlockable levels inspired by The Legend of Zelda (NES), A Link to the Past , and Link's Awakening . : Improved sound quality and an expanded view