From what I know, some games do have updates in them. Mostly all games (except for 1 JAP game) will either have an update for 3.1 or 3.4 in them. They wont ever update your console to higher versions. Only way to update to those higher versions is by going into settings menu and doing system update. Anyways, those disc updates will update your ios and any channels that arent up to date. I also know that when you pop in a game that has a disc update in it, it will ask you if you want to update. Ofcource if you dont update, you cant play the game (thats what nintendo thinks). But the problem with firmware 3.4 is that youll never get that messege. Instead it will just automatically update. Now there are ways to bypass those disc updates. If your on 3.2, you can install starfall. If your on a different version, you can install preloader but preloader works alot better on firmware 4.0+. Both of those programs can be set up to bypass disc updates. You can also prevent that update messege from coming up by simply installing the latest ios that game uses.