I started with 60+ ds games on an older R4 cart (that doesn't work with 3DS, I've tried). Then I ended up getting all but 8 games working on the Wii U. I got 6 of them working on dsmenu++ on the 3ds yesterday. I'm left with Mario & Luigi's Bowsers Inside Story and Okamiden that don't work on anything but my DS Lite. However Bowser's Inside Story is coming to 3DS in January. So I'll be left with one game that I need to play through (I do have several hours into it) and really love so I can't get rid of my DS, OKamiden. With that game would work on anything but DS. I could get a flash cart but doesn't seem worth it for one game.