Okay, so I have two 3DS's, an original red and a Yoshi XL, I've currently been using the red one for everything(eshop, NNID, games, etc) so far and wanted to system transfer all of my data and such to the new Yoshi XL.
Here's where the problem comes in, I have a digital version of Pokemon Y(Club Nintendo special offer) that I downloaded mainly for my sister to play since I already had a phsical cart for Pokemon X and was planning on getting another 3DS. What I want to do is transfer everything from my red 3DS to my Yoshi XL and then give my red one to my sister so that she can play Pokemon Y whenever she wants.
Now I need to know how to system transfer to the XL and then return the digital copy of Pokemon Y to the red 3ds so I can give it to my sister.
Quick help and answers are much appreciated, Thank You in advance.