Heres a tutorial for you anon, thats what i plan on doing anyway, I thought about this yesterday :
>Go to a farther GS from your location, knowing you'll never go back will make It easier.
>See if theres a female employee, If so, walk outside the store until her shift Is over or go back a different day.
>If theres a male employee, look around the store with an interested yet amused look on your face, like you are seeing new things, so they know you are interested but are not a fanatic.
>Ask for a random item, like a mouse pad or something, hinting you play at your PC, but be specific so you dont have to conversate a lot and he wont feel compelled to give you advice.
>As soon as he says the price of the item take your phone out of your pocket and pretend you just remembered something
>Pretend you are searching for something on your phone and say something along the lines of "oh yeah! my cousin/son/little brother asked me to get him some Pokémon card, he said its free?(while pretending to read) The z-zacian code??"
Take the card and leave