Mario All Stars + World has minor but noticably annoying slowdown with the sound. Same goes for Yoshi's island. Yoshi's Island has even lagged somewhat on certain parts. For Yoshi's Island I was using snes9x 2002, I had to change it for Mario All Stars because my character wouldn't move for some reason until I changed the core to snes9x 2010, but it was still kind of laggy/choppy sound. any advice on better methods for emulating snes games on PSvita?