TG16 to PCE controller adapter; being used to connect a US Turbo Stick to a Core Grafx.
One of the mysteries of video gaming is why manufacturers insist on taking perfectly good Japanese games consoles and redesigning them for the US and (less frequently) other markets. One particularly puzzling example is the NEC PC Engine. A small and sleek unit in Japan, it doubled in size for the US release and became the poorly spelt Turbo Grafx 16. As well as enlarging the console, NEC also saw fit to replace the mini-DIN plug used by the PC Engine controller with a full sized (though thankfully still standard) DIN. This meant and adapter was required to use PC Engine peripherals on the TG16 and vice-versa. However while the former was produced and is still available; the latter seems either never to have been manufactured or it was made in such small quantities that none are available today.