Professor Juniper gives it to you after you do something involving Team Plasma before the Elite Four. You Only get ONE so dont waste it.
Yes, you can get a master ball in Pokemon black. You get the master ball towards your last gym battle from Prof. Juniper =)
the master ball is for zekrom in white and reshiram in black
You can't!!
u can only get one master ball in Pokemon Black to my knowledge, unless u trade with someone whose Pokemon is holding a master ball, or if u hack it, which there is no hack to.
give it to Kurt and he will turn it into a master ball
yes only one
you can trade a Pokemon from black or white holding a master ball.
you can get one from trading from someone else a pokemon that is HOLDING a master ball, or you can use cheats
professor juniper gives it to you
After you defeat the dragon type gym leader, go to the route to Pokemon league you will be stopped by the professor and she will give you the Master Ball.
A Master Ball NEVER fails in the newer games because the way pokeballs work was updated, however in the older gba games there is a small chance that a Master Ball will fail.
The best pokeball to catch victini in white/black is the ultra ball or the great ball you shouldn't use the master ball.