If your 3DS says "This QR Code is not supported," ensure you are scanning inside the FBI app (Remote Install > Scan QR Code) and not just using the standard 3DS camera.
The popularized in 2021 refers to a homebrew method for installing the classic Nintendo DS game directly onto a modded 3DS system. Since the 3DS never received a native port of the game, the community developed QR codes that point to custom CIA files—repackaged versions of the original ROM designed to run through homebrew tools like TWiLight Menu++ . Unlocking a Classic: GTA: Chinatown Wars via QR Code gta chinatown wars 3ds qr code 2021 link
: Alternatively, users use "forwarders" to create a shortcut on the 3DS home menu that launches the DS game directly from the SD card. Beyond Installation: Legacy and Cheats Get ANY 3DS Game Using a QR Code #3ds 11 May 2023 — If your 3DS says "This QR Code is