I have the Limited Edition Animal Crossing 3DS with NL preinstalled. So if I want to make a second town do I need anything other than a 2nd sd card? Thanks
You'd need another copy of the game. Just changing the SD card doesn't work as far as I'm aware. There are people who have tried it and lost their first down in doing so.
you cant have multiple towns by just changing the sd card. if you did that your main town file would be corrupt when you put in your old sd card again. you need to buy a physical copy of the game.
You need a second copy of the game. So you could play a separate town on the digital copy and another on the physical copy. Of course if you were doing this to have any interaction between the towns (a different native fruit for good trading, storage space etc) you would need a second 3DS.