This has only been tested on a Arduino Leonardo board. But it should work Arduino Pro Micro and Arduino Micro because they all have the same microcontroller. The gamepad has the following controls.

This project provides an easy-to use programming API to emulate a Nintendo Switch controller using an Arduino UNO R3. The API allows sending button presses/stick movements on the emulated controller, ...

Arduino is so much about what is made with Arduino boards that we hardly spare a thought for the boards themselves. Well, Arduino cares, and they've just gone about redesigning their base model, now ...