I am pretty sure it is not possible. You can get 99 master balls using an action re-play.
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no but you can get to HQ and battle team galactic boss and he will give you the master ball
you get the master ball once you beat Cyrus in the galactic building
First, you need to break into Team Galactic's giant warehouse in Veilstone and once you finally make it up to the boss, he'll give you a master ball if you defeat him. You have to go to the lottery corner. The lady will ask you to draw and if you get the same number as the ticket you will get a master ball. You can do it once a day.
Yes. Right after you defeat Galactic Boss Cyrus once. I recommend you don't use it on Palkia, though, as there are much harder legendary Pokemon after the game. Use it on Mesprit or Cresselia later on.
You will find the boss after you see the all the galactic people in the heardqarters the boss will be talking. after that follow you guy up and there is the boss! gl