the new2ds is about to come out, as long as you get your nnid on it is ok, if you can't just make a new one except most of your games are digital download (which i am). Luckily tittle such as monhunt,pokemon,ssb4 i got are physical copies.
I didn't know they made an MSU cart for the Genesis.... I knew about the SNES one and the library for that is rather large but the Genesis one has very few games