I currently have Acekard2i. I'm going to buy second 3DS for my GF so we could play multiplayer games. Has there been any known problems with DS games and their multiplayer features with 2 different flashcarts? I have heard that 3DS should have 100% compatibility with DS games, but I was wondering if using flashcart will create problems. All I really want to do is play games with my GF. So we don't need internet features just multiplayer. I was thinking of buying some another card just to test out what else is out there. Acekard2i is great, but it seems R4i gets firmware updates faster. tl;dr Does DS multiplayer features work between 2 different manufactures flashcarts?