But how can you tell if they have the best IV's possible without access to the IV judge? IV's mean practically everything for competitive play in addition to the right nature and moves. Most would just wait until post-game to worry about the competitive side, aside from certain legendary Pokemon that the story forces you to catch. You're better off asking about this in the
Simple Requests thread over in the WiFi forums, as Orange Islands is about the casual in-game stuff rather than the competitive play.