In Veilstone city.
In the galactic warehouse to the left of the Galactic HQ
You will need Galactic key and this how to get Galactic key you will need to talk to a Galactic team mate by the Galactic HQ.
we'll technically they have 2 bases but the main base is in cobble stone
go to the top of galactic HQ then go all the way to the right
Velistone
you find it in the galactic HQ
At the end of the Galactic warehouse
after you get galactic key go to the HQ with sattilite dish go to the door
In Veilstone city. But remember, it is not the galactic wharehouse but the tall building on the other side. You'll need to get a key from the gurad outside the HQ. Then with the key, go to the wharehouse and open a door. Go and then look for the galctic key. The galactic key will help you get into the main HQ.
get to the top of christopher cool i mean the HQ he must be there
Team galactic isn't in Pokemon black!
Veilstone galactic HQ