on any legendary(just that it should be a strong or rare legendary)
You probally want to use it on mewtwo because it is level 70
you get it when you beat all the johto badges in the game and prof. oak will call you and give you a masterball p.s never let a sister use your pokemon games if she doesn't know pokemon and you have a masterball hope this helps!
Not unless you attach it to one of your gen. 3 Pokemon and migrate it ( if you still have it and didn't use it)
on the legendary Pokemon that you encounter on the game thx for reading x --:)--x
It isn't meant for any one pokemon. Most people use it on Mewtwo, which you probably should use it on. You can catch the legendary birds and Mewtwo without a Masterball but it can take a long time.
if you do not have a masterball then use an ultra ball
if u use any masterball cheat u get bad egg in Pokemon PC
Well,the masterball should be used on what pokemon you think it is your favorite but the best choise for the masterball catch is the mighty lvl 70 MewTow how is a pain in the hole to catch with other pokeballs,but that is your choise
No you don't have to.
use a masterball
You use a masterball
you use a masterball