The Game Wizard was a "Game Enhancer" for Sega Genesis that was created by Innovation. Up to four codes could be used at once.
A special start up process was required, probably to bypass the region/CRC checks in most games. First, the switch must be in the middle, then the console powered on, then the switch moved up and reset must be pressed. Unlike the PAR the switch must be set to down for codes to be active.
The instruction manual can be found here.
Screenshots
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Title screen
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Code screen
