Hey there I just recently got the game as a gift and was wondering if it would be okay to use 2 different 3DS? One is my brother's which is the old 3DS XL (doesn't have an NFC reader yet) which I first put my game in and the second one is my cousin's New 3DS LL (borrowed) which I plan to play on in case I wan't to scan amiibo cards. Will this mess up save files or something?