The Nintendo 3DS, the successor to the DS, is backward compatible. This means you can play Super Mario 64 DS on a 3DS. Furthermore, the 3DS has a camera and built-in software capable of reading QR codes. This functionality became the backbone of installing custom firmware (CFW).
First, a critical distinction must be made. The original hardware does not have a camera. Therefore, the vanilla cartridge of Super Mario 64 DS cannot scan QR codes natively. super mario 64 ds qr code
Disclaimer: These codes work on the USA version of Super Mario 64 DS. Using cheats may corrupt save files. Back up your data first. The Nintendo 3DS, the successor to the DS,