Lately I've been trying to get good at Mario Bros. 3. Frick that game and its difficulty! I've beaten it twice so far, once with GBA injection and once with restore points on the NES vc. (I have a N3ds xl) (I didn't use the restore points to cheat, I just set a restore point after every level.) I still have to beat it one more time, because I want to complete the Mario All Stars version. It sucks, because on Mario All Stars you have to beat an entire world at a time! And yet, it saves the fortresses you've beaten... Ugh. I complain and moan, but honestly I'm having fun with that game. I've not been skipping levels either, so it's time consuming. I've been playing that, and Sonic and All Stars Racing Transformed for the 3ds and Vita.
(I've never played Mario 3 before because I could never afford it. So it's like a whole new game to me! I only started playing it last month)