Little known fact: with the exception of select/start, NES and Game Boy buttons are interchangeable. If you want a nice tight game boy control, replace the D-pa

Little known fact: with the exception of select/start, NES and Game Boy buttons are interchangeable. If you want a nice tight game boy control, replace the D-pad with an NES one. If you want the best-feeling NES buttons ever, replace the concave A/B buttons with the Game Boy's convex ones. (Source: I took apart every nintendo console I own for sport/boredom when I was a kid.)