The Arduboy is a little gameboy-like Arduino based console. This guy sometimes might need to be reflashed via ISP. This piece allows you to flash it very easily.

More instructions here:
https://community.arduboy.com/t/bring-your-arduboy-back-from-the-dead-burn-bootloader/3422

Pogo pins:
https://s.click.aliexpress.com/e/_98UYsf