[quote name='Pojo']They can certainly tell if the Wal-Mart receipt matches the controller packaging.
Ok, I have an unopened black controller that I got from Radio Shack that I want to exchange for a red one at Wal-Mart. How would I go about doing that? They don't just switch out the controllers without a receipt, do they?[/QUOTE]
If the UPCs are the same, you could just buy the red one at full price. Go out to the car, grab the black one and return it at Customer service. You could theoretically do that anywhere actually, as long as the UPC is the same, because in the store's eye, its the same product. (Which it is, just a different paint job) However, my hunch is that they are different UPCs
I just realized I said nothing that would help you. Sorry