were gonna need more info are you using nesds. because as far as I know it's computability is near perfect and all mario games should be perfect since well it's mario. also what card are you using since that maybe the reason.This issue has NOTHING to do with compatibility.
QUOTE(bluebowser31 @ Jun 12 2010, 08:16 PM) when you are playing the game, tap the bottom screen, then tap display, then touch (and slide the stylus) anywhere on the screen, the farther to the right is more clear, but bigger, the farther left is squished, but will show full screen. this is because the original nes used a square screen, and ds screen is a rectangle, so you have to chose clarity and miss a strip off the top and bottom, or have it squished and some sprites glitched. so it should work COMPLETLY to the right, in the center.
(if u already knew all this sorz, thats all i can help)
oh also, i recomend using "none" (in display, under blend type) becasue it seems to me it helps with blur...