In the galactic HQ in veilstone city.
After defeating Cyrus in Veilstone, he should give a Master Ball to you.
defeat Cyrus at galactic veilstone building and he will give you a master ball.
from Cyrus
You get a Master Ball from Team Galactic Boss Cyrus at the Galactic HQ.
A player can obtain the Master Ball after you defeat Cyrus in the Veilstone Plasma Base.
bla bla all you do to get a master ball is beat the Cyrus and he gives you a master ball in the ware house they have and.... ta da! you got a master ball he onley gives you one
Beat Cyrus and he gives you a master ball. Keep it and wait till you battle Giritina.
You go to the Veilstone H.Q. in Veilstone City and go to Cyrus and defeat him and he will give you a master ball.
beat Cyrus he will give u one. :)
beat Cyrus in the veilstone base
In Diamond & Pearl, Cyrus
u can't