Pachinko Hisshou Guide - Data no Ousama is a Game Boy Color game serving as a guide for Pachinko games, specifically focused on data and strategies. The game likely provides tips, statistics, and information helpful for improving success in Pachinko games. The title translates to "Pachinko Winning Guide - King of Data."  The developer would likely be someone with expertise in the Pachinko gaming world.

Pachinko Hisshou Guide - Data no Ousama (Japan)

Pac-Man - Special Color Edition (USA)