Gametag comes with 8 tags for 8 games to start you off. My 16year old son has about 15 games on his Gametag I don't think it would be comfortable to have too many more than that.
So you could rotate your games by starting off with your favourite 8 or 15 games and as you get bored with a game unclip it (leaving the tag on so it is ready to play again) put it away someplace safe and put another game on your Gametag to take the place of the one you just removed.
You can rotate your games as often as you like or you can just keep the main games that are your favourites on the Gametag attached to your DS. If you want to carry all of them you may need more than one Gametag - 1 that is always attached to your DS and the other Gametag cliped to your backpack with 3 or 4 or even more rings on it and all your games attached. Just like the one in this photo with a bulldog clip so it can be securely fastened to your bag.
Order Gametag through our