No, you cant get a master ball when you are in there! To get a master ball you fly to Lilycove and go to the big building, the talk to the lady on the counter, if your lucky and you have the number that she has, you get a master ball. You can only do it once a day its kinda frusrating when you dont get one!
No only in aqua's hideout.
the master ball is in team aquas hideout. When u find the room with 4 pokeballs the one on the top left (I think) is the master ball.
There is a master ball in the Team Magma's hideout in Pokémon Ruby Sapphire, and Emerald. Look in the Hoenn region for the Team Magma's base of operations.
you get it in team aqua/magma's hideout in lilycove
Master Ball which you can get at the (Team Magma or Team Aqua) hideout
The first master ball is found in team magma's hideout the other or others can be won by the lottery in lilycove city in the dept store.
In the team magma/aqua hideout. The other way is to win it in the lottery.
In Pokémon Omega Ruby, you can find a Master Ball in Team Magma's Hideout located in the Fiery Path area. To obtain it, navigate through the hideout until you reach the room with the large, red orb. The Master Ball is located on the ground in a corner of that room. Make sure to explore thoroughly to find it!
Pokemon Lottery in Lilycove Dept. store, team magma/team aqua hideout.
You get the master ball in the aqua Hideout
You can get one in team aqua hideout (if you are in Pokemon emerald/sapphire) Or in team Magma hideout (if you are playing Pokemon ruby) It is near the two fake electrodes
Ummm... you can't buy a master ball. You have to find it in team aqua/magma's hideout (dont remember which one). And there's only one master ball. If you have an AR you could probably get more.