A skin is a type of sticker that you can put on i-pods, game systems, phones etc.
Try Ebay or Kijiji
eBay
eBay,amazon
eBay
if its on game boy advance you will need a link cable you can get 1 from ebay... if its ds its wireless
i bought mine of eBay
They should sell it on Ebay.
The Game Boy Advance SP was released in 2003. You are thinking of Game & Watch. The price varies so greatly my advice is check eBay.
If you want to buy a Game Boy Advance nowadays, you'll most likely have to look at Ebay.
you can get one off Ebay or overseas from Australia
buy a gameboy advance video cartridge on ebay.
probly fire red and also if you wanna buy pokemon cards by them on ebay from pokesharp!