You DON'T. Besides, why do you want to?
^^
You actually can... there are two houses in Sunnyshore City that are next to each other. You go in the first one and they're 2 old characters. Talk to them both each day and eventually Cyrus will appear and ask you if you want to become part of team Galactic. This house is located up some steps and to your right.
You'll need to go to Canalave City and the door to the Old Lodge (top right corner of the city) will open when you use the Member Card. If it doesn't, the event has already been activated before.
Darkrai can be found as a Nintendo Event Pokemon in D/P. You need the Member's Card to enter a inn. You go to sleep and in the dream,you catch Darkrai.
You can't find a Member Card in Pokémon Diamond because it's an event item that can only be gotten through Nintendo events.
I don't think you can... but you can in Pokemon Diamond, Pearl, and Platinum version you can use WFC (wifi) to obtain the member card ( I think that is what it's called) OR use cheats but all I know is you cannot catch it Pokemon white without cheats
You could have only gotten a Mystery Gift through Nintendo in order to access the Harbor Inn in Canalave City in Pokémon Diamond however the key that's needed in order to gain access to the Harbor Inn, the Member's Card, it was never released for Pokémon Diamond so the only way for you to get the Member's Card is to use a cheating device such as an Action Replay or Pokésav.
You cannot be a member of Team Galactic in Pokémon Pearl.
You have to beat team galactic and then talk to the man that is out side of the radio tower.
you cant
terwe4e4e56er5e
yes. it is at the place where you have to use defog near solaceon town where you see the old lady nd you have to battle a teram galactic member
You can't become a Team Galctic member.
using a Pokemon event
no
legit no. but there might be a hack or sumtin to. Actually... you can. There is a house up some steps and to your right with to old people in it in Sunnyshore city. Talk to both of them everyday and eventually Cyrus will come around and ask you if you want to become part of Team Galactic. I'm not sure if you can quit team Galactic because I haven't tried it yet.
MYSTERY GIFT!
You must be a member to answer questions.
Cynthia's grandmother gives you it after the bomb scare, which is after the Psyducks-ness. You need the SecretPotion to cure the Psyducks. You get that from Cynthia after you battle the Galactic Member you're supposed to stalk from Pastoria (The location you get the the SecretPotion is at the Valor Lakefront).