I finally got around to making my own wireless bluetooth controller that uses the nintendo classic i2c protocol but can easily be adapted to work with just about anything. I made a short video about it here (also uploaded to youtube):
I think you guys know where this is going. So I’ve been following the VGA1306 project and have seen people wiring retro game controllers to essentially make a consolized arduboy which I think is awesome, but wireless controllers would make it even more awesome. It would be super easy to adapt my receiver to output button states in parallel to attach to arduboy button input pins or even modify arduboy games to accept serial input in place of reading pin states.