I know it is weird question but here i go. I am looking for DS flashcard that works like Sky3DS. What does that mean ? Sky3DS flashcard operates in such way that 3ds thinks it is legit game it has it's own home menu button. Once you switch game home menu button changes and 3ds thinks you loaded up completely different card in it. So why the fuss ? DS flashcards on other hand usually use same homebutton to load up their own firmware from which rom is loaded. This means that whatever you play is always treated by 3ds as that one rom (in my case some bomberman). It also means that Activity log on 3DS doesn't show your DS games played. With Sky3DS approach to loading rom Activity log would show up properly what you played and how many hours.