Downloading copyrighted BIOS or firmware files from the internet is in many jurisdictions and violates Nintendo's Terms of Service.
Emulators are legal reverse-engineered software. BIOS files are direct copies of Nintendo’s copyrighted code. Legally, they are worlds apart. Nintendo 3ds Bios File Download
– If you own a physical 3DS, you can legally dump its BIOS using homebrew tools like GodMode9. This requires a hacked 3DS but keeps you within fair use rights. Downloading copyrighted BIOS or firmware files from the
: Papers like " Electronic Gaming and the Ethics of Information Ownership " discuss the tension between game publishers' rights and players' interests in archival and personal use. 3. Practical "How-To" Resources (Non-Academic) Legally, they are worlds apart
Once you have your dumped files, you need to place them in the correct directory so your emulator can find them. LumaTeam/Luma3DS: Nintendo 3DS "Custom Firmware" - GitHub