Masterballs

There is only 1 master ball and you get it in lilycove

You will be able to find only one.

But If the Pokemon ID of any Pokemon in your game matches all five digits in the Pokemon loto which is drawn in lilycove dept. Store every day, you will win a master ball.

(includes traded Pokemon that you traded from other game paks, or with npc's in the game) which is a number belonging on your trainer card, and the number will be attached to that Pokemon from it's original trainer

So far as I no there is only one you would have to trade or game shark the rest if you want more

You can only find one master ball and that's in the Magma Hideout.

There is only 1 master ball and you get it in lilycove

Well first you find one in aqua hide-out not magma hide-out then if you ever get to mirage island use the item finder around the lecie berry bush and you will find a master ball or cheat but if you are really lucky you can win one at the dept. Store in lilycove cityso there is a ton of ways you can get it I hope this helps you out rock on oh and me ha I ain't making any bogus report so have fun oh and if you ever do get to mirage island please let me knowhow.

I'm pretty sure there is only one, in the team magma hideout, and if you win at the lilycove department store, you could also get a masterball. However, I did hear a rumor (Rumor!) that if you caught all three regis, and raised them all to lv.100, then talk to the person who sometimes gives your Pokemon ribbons in slateport city, she will give you 99 masterballs. Again, I've never actually seen it happen, so I don't know if it is true. Hope this helps, and good luck!