Although I have had Nintendo Handhelds in the house for many years I personally do not like the small screens and controls and don't have more than a half a dozen hours on them. So I am not very familiar with the mechanics of the games themselves. Some of the DS games required each player to have the cart and some allowed multiplayer with only one system having the actual game cart. I think it was called download play? I can't remember because I quickly discovered the AceKard and it became a non-issue for my kids. Has anybody seen how the Switch will work? I am only buying one for now but let's face it Nintendo has already knocked down one of the "3 pillars" and the other will start crumbling if the Switch takes off. Not looking forward to buying two of the same title for portable play.