Palkia. Yeah, there's other ways to catch it, but most people use the masterball on the focus of the Pokemon game(Palkia in Pearl, Dialga in Diamond, Giratina in Platinum)to advance through the story faster
i would just say hold on to something as precious a Master Ball. Save before you encounter any legendaries! Try ultra balls as much as you can bear and you should be able to catch some legendary Pokemon with that. But for example MewTwo..that's REALLY hard to catch.. So it really comes down to..
HAVE YOU TRIED ULTRA BALLS?
DO YOU DESPERATELY CARE CAUSE YOU SHOULD IT'S LEGENDARY
also i would like to mention that all legendaries can be caught with ultra balls the only legendaries that are worth a master ball is the ones that run away, right away
Use it on a high level legendary found later in the game(Heatran, Dialga, Palkia) or on one of the roaming pokemon(Cresselia, Mesprit, Zapdos, Moltres, Articuno). Do NOT use it on Giratina, Uxie, or Azelf.
the best Pokemon to use the master ball on is latios or latias because even when you are battling them they can leave the battle and disappear. So use the master ball on one of these two before they disappear!!!!!!!!!!!!!!!!!
you should use it on the legendary Pokemon because they're the hardest Pokemon to catch and you only have 1 chance 2 battle them
I think that you should use it on legendary Pokemon that teleport or can escape from you
in sinnoh arceus........ in hoenn deoxys........ in johto lugia or ho-oh........ in kanto mewtwo.
in diamond you youse it on dialga,in Pokemon pearl you youse it on palkia,and in platinum you youse it on giratina
Mewtwo, which you find after you best the Elite Four.
I would use a master ball.
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
giratina
go to the 4 island give a master ball to one of your Pokemon put ditto in breed it the Pokemon that hatched will come out has a master bal
Master Ball
latious
I would use a master ball.
The best Poke Ball to use on any legendary Pokemon is usually the Master Ball.
The best ball to catch Deoxys is a Master Ball or a Timer Ball! Trust Me!!! Pokemon Master
Use a master ball.
You get their health really low and use a ultra ball the best
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
Master Ball is the best but I use the Dusk Ball and it worked==:COMMENTS:==~Silver*: Duhh? Master balls can catch any wild Pokemon -.-ll
use it
Use it on Palkia.
you can use your master ball
a master ball!!!