you get the key from looker and go inside its very simple
In the galactic warehouse to the left of the Galactic HQ
green portal
Its in the town of Veilstone
You get a masterball after you beat Cyrus in the galactic HQ
It is located in veilstone city..where maylene is located
you don'tthey're at galactic HQ in veilstone after explosion
You have to defeat Cyrus once more, at the Veilstone Galactic HQ. Hope I helped!
you go to sunyshore city and beat the gym leader
After you beat Cyrus at the Galactic HQ, he will give you one Master Ball.
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.
Team galactic isn't in Pokemon black!
you find it in the galactic HQ