first you have to have all joto badges and professor elm will call you go to his lab and he will give you master ball catch a cerebi with it its very hard to catch cerebi with ultra ball hope this helped you!
have a wank
By MasterBall
u buy it for 1000000
As you may know, Masterball is the best ball. I have both yellow, silver and gold. After I got the Masterball in either silver or gold, I traded with yellow. By making a pokemon hold the Masterball you trade it and in yellow you can clone it to have more of the best ball in the world. I would guess that Masterball is a lot easier to use when catching Mewtwo that a pokeball.
Recieve it from Elm after beating the Elite 4
I dont think that it is possible to get a masterball in the daily lottery
i would use an action replay other than that i dont know
There is no second masterball, the only way to get a second masterball is to trade with a friend.
Other than the masterball try using a lot of ultra balls.
No.
there is only one masterball
at Emerald: Lilycove city, u can win a masterball at Emerald: Lilycove city, u can win a masterball at Emerald: Lilycove city, u can win a masterball