You can use any games you have bought from anywhere and trade them into gamestop to get Game stop in store credits to purchase other games.
85%
Yes you can at gamestop. You give them your DS lite and they will give you credits. You can then use your credits to buy whatever you want that they have.
GameStop
You can Trade a DSI in at Gamestop, they will give you credits for your DSI to buy something else, such as a 3DS.
Gamestop/ EB Games. If you trade or sell your game for store credits you get more for having the guitar with it.
yes you can
No there is only the Gamestop site that tells what Gamestop sells the games for
Gamestop is a place where you can trade in games and consoles for store credit
NO it depends on the game system
EB Games or Gamestop.
You may be able to trade Xbox games however, Wii games are uncertain.