Dont get nintendogs, it gets boring in about a week, you wont want to touch it after that, cause its just a non motivating and boring game.
Save your money for some of the better titles coming out, i got nintendogs free at ebgames for trading in 4 crappy gba games, so no loss to me really, just a few crappy games.
Ok, as for the gamestop thing, what happened to me is i ordered Demikids for gba right (one of the best gba games imo), anyways when i went to pick it up they said the game never came in, then the manager said that he was gonna drive to another store (about 30 min away) and get it for me and that i would have it within a day or two. Well i kept asking him where my game was (this went on for like a week) and he kept saying, oh ill go tomorrow for it, oh i didnt get a chance today etc. Finally i just gave up, i went to ebgames and bought it off the shelf, thankfully they had it. Thats the last time i ever preorder a game from gamestop, frankly i should have gotten the game for free given all the trouble i went through. I guess they want you to give up and go to another store just so they dont have to do the extra work.
Also at a different gamestop, i ordered hamtaro gbc, same story, game never came in, cept this time i never was offered an overnight shipment or whatever you said they do, i was just handed my 5$ back and was told, sorry the game never came in (and i walked out without my game that i had made a special trip to this store for). This time i was able to buy the game at target down the street, thankfully they had it.