Wifi Gameboy Cartridge PCB for: https://there.oughta.be/a/wifi-game-boy-cartridge

Taken from the above website: "Before you waste your time with this project, I should probably make clear what this cartridge can do and, maybe more importantly, what it cannot do. This is a basic 32kiB Game Boy cartridge with an ESP8266 microcontroller to add Wifi capabilities. With this, you can access data from the internet or your local network on your Game Boy or send data from it. Since the ESP8266 can do a lot of preprocessing for the Game Boy, a Twitter client is just as conceivable as a Reddit browser. If you implement one. This is not a generic browser, but you can relatively easily implement services on the ESP8266 and write simple code that is executed on the Game Boy as an interface."