How do you make a QR code for Nintendo 3DS?

To create a QR code for Nintendo 3DS, you'll need a QR code generator. First, decide what content you want to encode, such as a friend code or a link to a website. Use an online QR code generator, input your content, and generate the QR code. Finally, save and print the QR code, which can be scanned using the Nintendo 3DS camera.