Thanks to Drew for sharing! Check out TCPoke here.
TCPoke is a collection of projects that allow you to connect your Game Boy, Game Boy Pocket, Game Boy Color, or Game Boy Advance to the internet and trade or battle with the first(Red, Blue, Yellow) and second(Silver, Gold, Crystal) generation Pokemon games.
At the core is a Teensy 2.0 shield and accompanying firmware to connect the Game Boy to a PC over USB. Then there is a lobby client that you can use to set up a connection to another player.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.