The Game Boy Advance (GBA) link cable is the third generation of this feature which originated with the Gameboy. It not only allows for peripherals to be connected, but also for multiplayer ...

RGB signals are read directly from the GBA LCD socket by removing the handheld’s screen in favor of a fresh flat flex ribbon cable. This method enables a noise-free digital-to-digital solution ...

In fact, it even supports link cables for multiplayer gaming and special features that were only used by a handful of games thanks to rumble, accelerometer, gyroscope, and real-time clock functions.