Now, a modder named Stacksmashing has brought online multiplayer to Tetris on the original Game Boy.
To do this, Stacksmashing has used a USB adapter sporting Raspberry Pi Pico, which can connect to the Game Boy’s link port to add wireless functionality. He also had to create an open-source software stack with a Python server and WebUSB frontend.
The adapter also supports the Game Boy Color, Game Boy Pocket and Game Boy Advance.
All in all, it’s a pretty neat project. You can see Stacksmashing’s full video explaining his work below: