The Gameboy Player is completely optional but can be a great addition to the system. The player allows you to play any Gameboy, Gameboy Color, or Gameboy Advance game directly on your Tv. It is great if you already have a Gameboy game collection but can be quite expensive. Nintendo released a few other minor accessories on the Gamecube including a Modem Adaptor for online play and a link cable to your Gameboy Advance system. Unless you are sure you are buying a game that supports this, you shouldn’t buy one.The ESRB rating system allows parents to control what their children are playing. This can help you sift through the titles that are inappropriate for little ones. Before investing money into any game for a young person, check the ratings for appropriate age groups.