So, I didn't backup my original NAND (or I did, but everything initially seemed fine so I deleted it at some point) and downgraded my console by booting Decrypt9 from Soundhax and running 9.2.0 ctrtransfer. Everything appeared to work, but it won't boot DS games. I've repeated this on another console (for which I did create a backup NAND) and it happens every time. Of course I knew installing CFW would stop DS games from booting, but I didn't know downgrading would. I'm not too bothered about it, but I need to sell the console and obviously it would be nice for the buyer if there was any way to get DS emulation working again. Any ideas how or if it's impossible?