I had the Nintendo 3DS and Mario Kart 7 but I had a friend with the Nintendo DS and Mario Kart DS, so everytime we saw each other we'd switch until he had to go home or I had to go home, while I wasn't a fan of the D-Pad of the DS the game had amazing tracks and I couldn't believe it had a boss mode, so cool, amd the Nintendo DS map on the battle mode was so cool