I have had lag i think it is just a thing that happens on the 3ds, Hopefully it will be fixed on the N3ds but if you play with someone who has a 3ds or XL it will most likely still lag. Oh and if you find that you are experiencing lag when you play with your friends go the the friend list (on smash bros) and look at the wifi symbol if it is green they have good wifi if it is red bad and orange mediu.