frst defeat the gym leaderthen go to the team galactic headquarters the one that is small. then when you have accomplished that you can go there!
From Cyrus after you beat him at the Galactic Veilstone Building (4th Floor)
Cyrus is in the galactic building in veilstone
defeat team galactic boss at the team galactic veilstone building.
veilstone team galactic base veilstone team galactic base
you use it in the galactic building in veilstone city, but only on certain doors
Galctic Headquarters is actually the Team Galactic Veilstone Building, but you'll need a Galactic Key to enter most of the doors.
He's in the Galactic Veilstone Building, and on top of Mt. Coronet. But not after he leaves Mt. Coronet.
u can find him in the galactic building in veilstone (p.s its not the galactic ware house
In Veilstone city
Try to find your way to the boss and battle him. Then you can go through the door in Mt. Coronet.
All you have to do is Batlle him and get the Galactic key card
um the galactic boss will give it to you after you beat him in the veilstone building