When you look at the date on Gamestop's print out list there will be an SD by it for confirmed street date.
Like it'll say 08/01/2013SD on the paper itself. If the SD isn't there its a filler date. And Pokemon X and Pokemon Y Don't have official Street Dates yet. Fans will know street date before the stores do.
Haven't we traded enough for you to know that I can any poke that any one wants?? But it will take be a bit to get all of those for you, I will get them on my EM white fc for you since I have the most room on that one, I will let you know, headed to the chasm now!!