Why does the emulator exclude the last 2 characters of Game ID in various places?

[JosJuice]

Whether a game ID consists of 4 or 6 characters is a matter of definition. Nintendo always uses 4, which is why the exported save data only uses 4. (Dolphin exports to the same format as the Wii Menu does.) Dolphin traditionally always used 6, but online databases like GameTDB.com typically use 6 for disc-based games and 4 for downloadable games. I think the reason why the title bar shows 4 characters is to help match things up with the list of game names from GameTDB.com which Dolphin uses in various places including the title bar.