Hi, i got a problem 
My brother and I have a 3ds each one, and He transferred his 3ds data to my own 3ds, because i got the XL version and he got the normal one.
how can i use my Nintendo ID on the nintendo 3ds of my brother without a system transfer?? There is no way to switch accounts between systems? Or our accounts will always be in a single console forever?
we both have digital purchases, for that reason it is not useful to us the normal system transfer
thanks.