Team Galactic boss is in M.T Corenet near snowpoint city.
You get it after you beat team galactic boss Cyrus.
if you beat the boss of team galactic, you will get a master ball from him
defeat team galactic boss at the team galactic veilstone building.
Pokemon Diamond and Pearl's Team Galactic are ruled by 3 commanders (Mars, Jupiter and Saturn) and the Boss Cyrus.
the team galactic boss gives it to you at the team galactic hideout!
at the stone pilar
Spear pillar, which is at the top at mt.cornet. There you can catch dalgia.
Both Pokemon Diamond and Pearl have Team Galactic as the main antagonist team.
You may not join Team Galactic in Pokemon Pearl or Diamond.
Nobody knows... Not even me! I completed the whole thing and I still don't know!
At the peak of Mt. Coronet.
The boss of Team Galactic (Cyrus) gives you the Master Ball after you beat him in the Team Galactic hideout in Veilstone City. This happens after you beat Candice in the Snowpoint City Gym (7th Gym).