Mario Kart DS featured an in-game drawing tool known as the Emblem Editor. This tool allowed players to draw pixel-art avatars using a limited color palette and grid. These emblems would appear on the karts of players during races.
Because the Nintendo DS had limited internal storage and no native "friends list" messaging system at the time, sharing these emblems was initially restricted to local wireless play. However, the community quickly discovered that the emblem data could be encoded into QR codes. mario kart ds qr code
Here are the most in-demand codes. Disclaimer: Using save exploit QR codes will erase your current progress. Back up your save using a DS flashcart if you want to keep your old data. Mario Kart DS QR Code Tutorial What they are
Use the MKDS Ghost to QR Converter (Python script on GitHub:
github.com/pleonex/mkds-utils). You can extract your own best times and turn them into QR codes to share with friends. QR codes in Mario Kart DS encode custom
It is a common misconception that QR codes were the primary method for all sharing in Mario Kart DS. In reality, the QR code functionality was specific to the creation and sharing of Custom Emblems.