: A database file required for games released after 2015 that use specific encryption "seeds".
When setting up 3DS emulators like Citra or Folium, you may encounter requests for a "Nintendo 3DS BIOS file" or "System Files." Unlike older consoles, 3DS emulators often don't require a single BIOS file to boot, but they do require specific and system data to run encrypted games or access system features like the Mii Maker. The Legality of BIOS and System Files Nintendo 3ds Bios File Download
To remain on the right side of the law, the recommended method is to that you legally own. Essential Files for 3DS Emulation : A database file required for games released