: Once scanned, a prompt will appear on the bottom screen; select "Yes" to begin the download and installation. Sources for QR Codes Get ANY 3DS Game Using a QR Code #3ds
: A homebrew store that hosts various applications, including those needed for DS games [9, 10].
If you want to play your legally backed-up DS games on a modern console without carrying cartridges, here is the gold standard.
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