For Game Boy, this game was a HUGE hit. Every kid I knew wanted it, along with myself. They originally released two versions if I remember correctly, Red and Blue. In both versions you could get all but 1 or 2 Pokemon. The missing one(s) were within the other version. So my friend who had the red version had an adapter hookup so we could trade for the Pokemon we were missing. Cool concept, but sucked for kids who didn't have access to what was need to make the trade. Condition is great and game still works perfectly.