you should use it on a very hard legendary Pokemon like dialga palkia giratina shaymin or arceus
You could use any ball but I suggest weakening them to 1 HP first, then putting them to sleep, then catching them with an Ultra Ball. DON'T WASTE YOUR MASTER BALL ON THEM!
No but i have heard that you can use it like a master ball on latias
For Zapdos: Go through the power plant and use your master ball, If Master ball has been used then attempt to capture with Great ball or Ultra ball. For Moltres: Go to Mt. Ember and climb to the summit and Moltres will be waiting. Use your Master ball, If used try to capture with Great ball or Ultra ball. For Articuno: Go to the Sea foam caves and move the boulders through the empty holes ( Strenght HM Is needed ) Articuno is tricky to catch. Use your Master ball, If used try to capture with Great ball or Ultra ball.
I used a Master Ball to catch Palkia, but that was before I knew Uxie, Azelf, and Mesprit were legendary. It all depends on the types of the Pokemon or how long you expect the battle to last. For Water-type or Bug-type legendaries, use Net Balls. For long-lasting battles, use a Timer Ball. For cave or night battles, use a Dusk Ball. (I recommend this for the Generation IV legendary trio, Uxie, Azelf, and Mesprit.) For Water-types, use a Dive Ball. (I'm not sure where you get this.) An overall ball to use would be the Ultra Ball.
Use a master ball
to capture the legendary Pokemon you meet
Use A Master Ball Or Ultra Ball To Catch. But I Think It is Hard To Find Master Ball...:/
you can use your master ball
Go and use it on a legendary Pokemon like dialga or arceus
The best Poke Ball to use on any legendary Pokemon is usually the Master Ball.
Use the master ball you get from profe elm
You get their health really low and use a ultra ball the best
Witchever you want, but you should probably use it on rare or legendary pokemon.
I think it is almost impossible. You can use master ball on it. Legendary Pokemon are really powerful and you may need to use even ultra ball (extra legendary Pokemon like mewtwo or lugia are recommended to catch with master ball).
Defeat Team Galactic Boss Cyrus, and he gives u a master ball. then he will tell you where the Legendary Pokemon are. Follow his direction...and use your wise to use masterball
i would have to say that thebest one to use it on would be a legendary dog because just buy alot of ultra balls and save before you battle ho-oh and then you have a better chance