On a certain Pokemon that you want to catch and it's hard to catch it with just a Poke Ball, a Great Ball, or an Ultra Ball. I don't know where else you can get Master Balls besides the Silph Co. I usually use the Masterball on legendery Pokemon.
Mewtwo I guess????
You should use it on one of the 'roaming' pokemon, like Cresselia in Diamond/Pearl/Platinum.
there are 2 master ball s and a master ball is rare you can only use it for kyogre requaza groudon salmence fly gon and the rest of the strongest Pokemon a master ball always captures a Pokemon no Pokemon can break out its in possible
no, you don't have to use your master ball on it. you could use it for any legendary Pokemon like mewtwo, or... you know what i mean!
you can use master ball in caught the groudon
if you did not want to use a master ball on a Pokemon you did not want to capture, if you did not save it then you could restart it and still have the ball but you also get in a trade attached to the Pokemon.
You should use it on one of the 'roaming' pokemon, like Cresselia in Diamond/Pearl/Platinum.
Use it on Palkia.
a master ball!!!
You can use the Master Ball on any Pokemon you want to use it on, but I would use the Master Ball on roaming Pokemon, since they are difficult to keep them in the battle without fleeing. The roaming Pokemon includes: Articuno, Zapdos, Moltres, Raikou, Entei, Latias, Latios, Mesprit, and Cresselia.
use a master ball on it
no, you don't have to use your master ball on it. you could use it for any legendary Pokemon like mewtwo, or... you know what i mean!
Use the master ball on it as it will catch it straight away but personally, I would just be patient as there are better Pokemon to use a Master Ball on.
You can either trade with someone who has a master ball or you can use a gameshark, there is only one master ball in a game
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
depends you can use the master ball and get it in one go without attacking or you can weaken it and throw a premium ball because you only get 1 master ball
how to catch dailga in Pokemon diamond use the master ball