via backward compatibility, it doesn't officially use QR codes for content.
On a standard Nintendo 3DS, QR codes are typically used to share or open URLs in the internet browser. However, for Chinatown Wars , their primary utility comes from homebrew applications like FBI : gta chinatown wars 3ds qr code
To understand the significance of the QR codes, one must understand the context of the Nintendo 3DS hardware. Launched in 2011, the 3DS boasted a glasses-free 3D top screen and a touch-sensitive bottom screen. It also featured three cameras: one inner and two outer cameras capable of taking 3D photos. via backward compatibility, it doesn't officially use QR
Let’s be direct. It circumvents copyright protection. via backward compatibility
This scarcity is the sole reason the “QR code” search is exploding.