I wanna Get Giratina But i need another masterball
Go to jubilife city. If your pokemon id number matches the lottery number ten you get a masterball.
If you go the town with the day care, one man asks you to bring him a certain pokemon. He will then give you a reward. The man once asked me and my friend for a arceus. We got one from the gts and gave it to him and we got 5 masterballs.