I am pretty sure you get a masterball.
I believe you win the lottery. The I.D. number must match perfectly.
It can be found at team aqua's base also you can win one from the lottery in the lilycove dept store.
the lottery is not in leafgreen.
Lilycove City.
You're able to play the lottery once a day.
once a day
You cant
You Win the lottery by luck and skills. But it's mostly luck that you need. To improve your chances, you can trade Pokemon with different ID's.
Technically there's infinite master balls because you can win one from the lottery in lilycove city in the dept store.
win the Pokemon lottery
I think a masterball
no