U can't buy fast balls but u can buy quick balls or maybe get them out of apricorns
Answer:You cant buy fast balls, but you can have Kurt make them by giving him any number of Wht Apricorns in Azalea Town.
You can get them from the lottory or Professer Elm but you can not buy master balls.
Buy an action replay from gamestop
You get it every time you buy 10 ultra balls.
You can't you only get one. The only way to get more is to cheat or trade.
You buy them at the Safari Zone, the shop right in front of the Pokemon Center (the girl with next to the Butterfree). Along with Quick Balls, she also sells Dusk and Nest balls.
you don't you only get one per game from prof. elm, after you beat Claire
you can't buy heavy balls, but you can make them. you have to have grey aprecorns and go 2 the pokeball maker and give him the aprecorn and come back the next day. =D
you cant buy master balls in any Pokemon game so far. you only get one from prof. elm afta you have got all 8 johto badges
You have to check the guy at North end of every Pokemart. They sell mail but also special balls like Netballs.
Buy ultra balls because you go to bell tower then see ho-ho
I do belive there won't be that kind of cheat, but a smart, but long way is to buy a Pokemon pearl, or diamond, then cheating on that game, then trading and having those Pokemon have master balls.