you can not get a master ball in Pokemon platinum only the one professor Rowan gives you
cyrus gives it to you
Pokemon lotery and action replay
the guy from the team galactic gives you one to catch girantina in the distortion world
i`d say the best possible thing is action replay
Find them or u get a action replay
You can get only one. Galactic Boss Cyrus will give you one when you defeat him at Galactic base.
number 133 is remoraid you find him on the left bottom side of solcelean town also u can get 30 MASTER BALLS THERE TOO
well you should have 493 master balls so find the number of Pokemon that you want, make the master balls show that number and presto you find that Pokemon in the wild
there is only one master ball that you get in firered
You have to go to Jublife city and go to the TV station and draw a Pokemon Lotto ticket if any of your pokemons ID matches exactly you 'll be able to get a Master ball.
Get an action replay
In skyrim