for Pokemon there are no codes
there is only one masterball
defeat all rockets and giovani then a man will ive you a masterball
i masterball
No but you can have a friend trade you a Pokemon holding the masterball they got.
You get the masterball when you go and defeat Team rocket
you cant but u get it from the Silph Co. president.
The president of silph co will give you one.
Find it on a route in the grass then use the masterball.
You can't. You only get one without trading it from another Pokemon game.
the masterball is for any Pokemon you want, it can catch them without fail ( it will ALLWAYS work ) . you are supposed to use it for mewtwo though. :P
it roams. u have to get lucky and catch i with the masterball because it flees.
you can use it when ever you want but i recomend using it on mewtwo