ROMs, or Read-Only Memory images, are digital copies of games that can be played on a computer or other device through emulation. In the case of 3DS ROMs, they are essentially digital dumps of the games from the 3DS console, allowing users to play them on their computers or other devices using a 3DS emulator.
: Standard ROMs are often encrypted to run on real hardware; however, emulators generally require decrypted files to function. 2. Required Tools & Hardware all 3ds roms
A full “No-Intro” 3DS ROM set (decrypted, all regions, no duplicates) is approximately: ROMs, or Read-Only Memory images, are digital copies