How To: Transfer content between a Nintendo DS and a Nintendo 3DS with System Transfer

How to Transfer content between a Nintendo DS and a Nintendo 3DS with System Transfer

Once you've updated your Nintendo 3DS to a recent version of the software, you'll be able to connect your 3DS and any of the older DS handhelds (such as a DSi). You can transfer content between the two devices using the System Transfer tool, as described in this tutorial.