i cant do that bit either because i don't know where the pokemart with the members card is but some guy told me you can get it from any pokemart but hes wrong because i have looked in a few different pokemarts and there is no green guy that gives me a members card by the way that's not how you spell darkrei you spell it like darkrai and if nobody answers the question check your bag to see if you already have it.
Chat with our AI personalities
94000130 FCFF0000 62101D40 00000000 B2101D40 00000000 0000B5D4 00000008 0000B5D8 00000000 D2000000 00000000 Press L+R while entering a pokemart.
Enter any pokemart to see a man in green standing next to the counter. Talk to him and he will give you the Members Card. Fly to Canalave city and head north of the Pokemon center. There is a Harbor Inn that you can now enter. Once inside, you will be put in a bed and taken to an island that just has Darkrai waiting. Darkrai is level 40 and you cannot leave the island unless you capture or defeat Darkrai so be sure to bring a party that can handle it. NOTE: You cannot get into the Inn if you have not cured the sick boy with the Lunar Wing. See the Cresselia section of the guide if you have not taken care of the sick boy.
i don't know if it is the same on platinum but on diamond you use a cheat and go in a pokemart and talk to the guy in green he gives you a member card walk up to the building and you go in a guy puts you to sleep and you catch darkrai
at valencia
first you must have 666666666666 darkrais than you can talk to the man in ##### and jubilife town than you get the members card