hackers are already hacking the game. Where do you think base stats come from? The game code and serebii already has them. Hacked pokemon you wont see until pokemon bank and then you will be able to hack anything except gen 6 new pokes. All the old ones can be pokesaved into BW and then transferred to gen 6. Pokebank may be able to stop the hacked pokes at first or the really obvious ones but you will be able to upload hacked pokemon into it pretty easily.
Except Serebii does not have the base stats, everything is being done manually by hand and everything you see is a estimate.
Just like when a cash register looses power and the cashier has to do everything by hand (and most people dont know how to count change)