The Genipak is a game enhancer for the Sega Mega Drive, released by Taiwanese company Realtec in 1992.
Not much is known about the Genipak. The design of the cartridge restricts the use of the device to only Japanese or Asian consoles. The codes are in a different format than the Genesis Game Genie and Genesis Pro Action Replay. The device was shipped with a code book that is now rare and little of its content is posted online.
The screen has a selection of 16 letters which probably represent 0-F in hex. The code format has not been decrypted yet.
The Selection of Letters