You go to the Poke-mart and buy 10 pokeballs. You will get a preimer ball as a bonus. i hope this helped!
cheats
You can't.
you can not get a master ball in Pokemon platinum only the one professor Rowan gives you
1 master ball and a WHOLE LOTTA ultra balls AND dusk balls!
You can buy them at the Pokemon mart at the Pokemon league. I buy my timer balls, heal balls, etc. at the Pokemon mart in canalave city
cyrus gives it to you
no
Get ultra balls and get your behind up in there
2
Hearthrome city
Action replay
Pokemon lotery and action replay