how do i open it? this is my first game i tried. I can't seem to find it in the 3dnes
Suppose that you already have the mario3.nes file.
Download the 3dn file
Put it in the same folder with the mario3.nes file and rename it to mario3.3dn
Launch 3dnes, open the rom mario3.nes and enjoy.
So you out the original .nes rom in the same folder as the .3dn file both with the same name but different extention and open the .nes and it should launch? Its not working for me if this is correct.
oops 1 year late sorry but to those having trouble launching a game make sure that it's vanilla US copy not hacked or other regions etc. that's how I solved my launching issues. find a diff version of the rom until one works. yes same name and same directory as the .3dn file