The most common context for a "Mario Kart DS QR code" is the process of digitally installing the game onto a custom-firmware-enabled Nintendo 3DS or 2DS.
The mid-2000s marked a transitional period for handheld gaming. The Nintendo DS, with its dual-screen design and touch capabilities, offered new methods of player interaction. Mario Kart DS was a pioneer in this era, being the first title in the series to offer true online multiplayer. While the online racing components received critical acclaim, the game also introduced a novel method for sharing user-created content through the "Emblem Editor" and the storage of mission data. mario kart ds qr code