its in the aqua hideout with 4 pokeballs in a square
Go to the aqua or magma hide out.
Team Aqua base.
after you defeat the boss of team aqua and they take you to the top of the ocean and you are on the ring of land you surf to the center and dive there will be a rock and that rock has a master ball on it
You can get Master ball at where the Team Aqua hide out is. You should be able to get into a room with for item balls. the two in the front is Pokemon the two at the back is a master ball and nugget.
You cannot find a second master ball however you can trade Pokemon to get another Pokemon with a master ball or use an action replay
Fly TO Lilicove city and Surf ontop and you will find a cave,go inside and find the master ball
After you defeat Giovanni in Sliph Co. the President will give you the MASTER BALL.
Use A Master Ball Or Ultra Ball To Catch. But I Think It is Hard To Find Master Ball...:/
you cant find a master ball but Cyrus gives you one to catch giritina after u beat him for the 2nd time
Go to the cave in the cove out side of Lilycove where Team Aqua used to be. Go in and look around until you find a room with four Pokeballs in it. Two will be Electrodes; defeat them. The next two will be a Masterball and a Nugget. Hope this helped.~
you need to buy a master ball or find one you cant make a master ball
You only get one master ball from professor elm.