Worried that you’ll button mash your 3DS to death trying to play Super Smash Bros? This $12 hardware hack might put you at ease.
That’s right, dekuNukem’s project only cost $12 in parts and the code is all up at GitHub.
No surprise to see an Arduino Nano in the project. The Arduino reads the state of the GameCube controller, mirrors and sends to the Nintendo 3DS. How much of a delay is there? Less than 1 millisecond and users can customise button mappings.