I wish to play xenoblade, and I got an old 3ds XL + Gateway+ DSTwo I want to give my nephew my old 3ds and the means to play 3ds backups. And buy a new3ds for myself. What would be the best and cheapest way to achieve this? Keep gateway for the new3ds? Or find new solutution for the new3ds to play 3ds backups? Also I read newer firmware are not hackable? What if I buy new3ds with newest firmware..