How do you get more master balls leafgreen?

Answer 1

defeat the team roket boss in silph corporation in saffron city(city with sabrina's gym),

then talk with the old man there he will give you a master ball
While you're exploring Sliph Co, there should be one that the president is holding it. defeat Givoanni and then talk to the president he'll give you a master ball. This is the only Master Ball that is obtainable in the game without using cheats.

Answer 2

once you've captured 100 Pokemon GO to proffessor oak then talk to your mum in the game and she will give you 100 master balls.

here's a good idea catch the elite fours Pokemon. (you really can )

Answer 3

i think there is a lottery maybe it is in celdon city , but if ur ticket number matches five numbers of any of ur Pokemon numbers then u will get a masterball i think.

Answer 4

it's in the rocket hideout