Goldeneye Preorder Code HELP

[Mikau94]

I was going to preorder Goldeneye Wii tonight and ran out of time. The preorder comes with invisibility mode. A friend of mine preordered and will get the code. Are the Gamestop codes reusable?

I know it probably doesn't matter anyways because there will probably be a way to unlock it hust like in the version on the N64