QR codes (Quick Response codes) are two-dimensional barcodes that store information, such as URLs, text, or other data. When scanned using a camera or a QR code reader, the code directs the user to a specific webpage or action. In the context of DS games, QR codes can be used to download game data, demos, or even full games.
While not a "direct" QR install, you can scan DS game QR codes with your smartphone. The code will open a download link in your browser. You save the .nds file, then manually drag it to your SD card. This is slower but works 100% of the time. download free ds games qr code
Technically speaking, a QR code can store any text-based data, including a URL. A malicious or piracy-focused website might embed a link to a ROM file ( .nds or .ids ) inside a QR code. Scanning such a code on your smartphone would open a browser prompt to download the game file. QR codes (Quick Response codes) are two-dimensional barcodes