What do you need to hook up a Nintendo Wii to your old tv?
Just because you dont have AV ports in your tv does not mean its old. You need to buy a AV Cable converter.
I think you are asking what Nintendo games from previous consoles can be played on the Wii console? Just GameCube games, there is a spot on top of the Wii for the GameCube controllers to plug in. You can also download the old games right to your Wii (via Internet and Nintendo Shop) and play them that way, but there are no spots for the old cartridges to be inserted on the Wii.