Dumb sounding question but as I've never even considered it before, do pal nes games run on a US system? If so, I'm interested in a few.
I don't think they do but there's a simple mod to cut a pin on the region lockout chip that makes the NES region free. I did it to mine so I could play SMB3 which turned out to be a US version. It's simply a cut to a pin on a chip with some pliers but if you want to do it safely you need to earth it to the edge of the PCB by soldering some wire on.