Before you can use a Pokémon randomizer QR code, your Nintendo 3DS must meet specific requirements.
Supports mainline 3DS games and allows for randomized wild encounters, trainers, base stats, and evolutions. pokemon randomizer 3ds qr code
Place your randomized game files (usually named code.bin or located inside a romfs folder) into that Title ID folder. Reinsert the SD card into your 3DS. Before you can use a Pokémon randomizer QR