Here's a keychain I made. I know several models are already on here, but I decided to design one of my own. I printed it in 6 different colors, and used a tiny bit of acrylic paint (only because I don't own any Dark Grey filament.). The pieces were then superglued together.
I went a little overboard on details... Even put the arrows and dimple into the directional pad. Oh, and the shoulder buttons have L and R embossed in them. This is as close to actual scale replica that I could hope to come, short of stamping the lettering and logo on. And if I had the capability to do so, you better believe I would have done it.
I printed mine at .1875 layer height so the L and R detail showed up. ( But just barely)
You'll want supports on so that it prints the bail loop.
Anyhow, enjoy... and happy printing!