To understand the confusion, we have to look at the hardware. The original Nintendo DS and the later DS Lite models were released before QR codes became the ubiquitous standard they are today.
It sounds like you're looking for a version of a Mario Kart DS QR code—likely referring to the printable QR codes used for custom tracks or distributions in games like Mario Kart DS . mario kart ds qr code
However, with the advent of tools like (a fan-made replacement for the defunct Nintendo Wi-Fi Connection) and custom launchers, the concept of the "Mario Kart DS QR Code" has actually become a reality—but usually for emulators or modified systems. To understand the confusion, we have to look at the hardware
While the original 2005 cartridge couldn't support QR codes, the modern "homebrew" and modding community has changed the landscape entirely. However, with the advent of tools like (a
There are several types of Mario Kart DS QR codes, each offering unique content: