My guess is that they are safari balls, from the safari zone or great marsh.
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
You cannot duplicate Master Balls in any Pokemon game.
Get rid of some of the master balls! the number of master balls you have is the number of the pokemon
balls
NO
To get safari balls in Pokemon ruby you have to go to the safari zone and go up to the man and he will give you 30 safari balls
Just throw a some Ultra balls, Heal balls, Luxury balls, Premier balls, standard Poke balls, and Dusk balls if you're in a cave or capturing the Pokemon at night. Keep throwing the same kind of Poke balls until the Pokemon can get out very easily, then use a different kind. This might take a while. It's easier if you capture the legendary Pokemon at night, so more Poke balls are effective. (Dusk balls)
haha balls
You Can't
Cherish balls are the poke balls used to contain Pokemon obtained through Nintendo events, such as the Jirachi that was recently distributed at Gamestop.
1 master ball and a WHOLE LOTTA ultra balls AND dusk balls!
there is no action replay code for park balls (pokemon masta rulez!)