Game Controllers To Usb Adapter Plate/arduino Pro Micro Development Board Compatible With Sega Md/cd32/nes/snes/pce H8wd - Usb Receiver Adapter - AliExpress
DIY ARDUINO MOUSE JOYSTICK - YouTube
OSOYOO Pro Micro 5V/16MHz Module Board with 2 Row pin Header Replace wit Pro Mini for Arduino : Electronics - Amazon.com
Can Arduino make USB devices? Try using the HID function with Arduino Pro Micro (Leonardo)
Turn your ProMicro into a USB Keyboard/Mouse - SparkFun Electronics