Howdy and congrats on your wii. You can go online to the shopping channel and buy old games from all the past consoles from nintendo. The way you purchase and download them are with what Nintendo calls Wii points. You can buy the cards at Walmart, target, etc. or even do what I did and purchase them thru the shopping channel. I believe they are in 10.00 incriments such as 1000 = 10 2000 = 20 3000 = 30 and up to 5000 i believe.
Hope this helps