I will be getting a 2DS pretty soon and was thinking of investing in a flashcart for it to play backups. My question is, which cart would be the best option? Where would be a good place to order one? I have heard good things about the R4. Is there a cart that can play 3DS games as well as DS games, or would I have to buy a seperate cart for DS backups? I mostly want it to play Pokemon X, Sun, and Super Smash Bros.