you have to go to the guy near the whirl island and yo will find it
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
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.
Once you have 8 bages, you talk to pofessor Elm and he will give you a master ball.
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.
In emerald it is at the space station
a master ball
Try harder