According to David Sheff's book Game Over, Yokoi never actually intended for the console to be released in its present form.
As a tribute to the deceased creator of the puzzle and former Metroid series director, Gunpei Yokoi, the puzzle made a small cameo appearance in Metroid Prime for GameCube, Samus Aran would have to use her morph ball form and charges to interact with it, once completed would allow her spider form morph ball entrance to a higher level of the chamber.
The original version of Wild Gunman was one of Nintendo's electro-mechanical arcade games created by Gunpei Yokoi and released in 1974.