It's perfectly fine in normal NES resolution. Oh and I have a german PAL 3ds and super mario bros is NTSC, just listen to the music:
[youtube]RbW0qBmveqI[/youtube]
You'll notice the PAL one is faster, you'll notice that you have the NTSC version because of the slower music.
[youtube]RbW0qBmveqI[/youtube]
You'll notice the PAL one is faster, you'll notice that you have the NTSC version because of the slower music.











