Can you scan Animal Crossing cards on a New 3DS without an NFC Reader and Writer?
Solution 1:
The NFC Reader/Writer is just intended to be used with 3DS devices that don't have the built in ability to scan amiibo/ amiibo cards, like the New 3DS does.
If you have a New 3DS, you will not need this device as you can just use the built in capabilities of the New 3DS to scan the amiibo cards.