for Super Mario 64 DS . The game was released on the Nintendo DS in 2004, a generation before Nintendo began utilizing QR codes or online account linking for its handheld systems.
Since the game was released long before QR codes were standard, you won't find official codes in the manual. However, fans use them for: super mario 64 ds qr code
The QR code is usually scanned through the FBI homebrew application to download .cia files directly to the console. for Super Mario 64 DS