I would use it to catch one of the wandering pokemon, like entei or sucuine or raiku. because all the the other legendaries, even though it might take a while, you can use ultra balls on them.
You can't. You can only get one Master Ball.
The master ball code is: 82003884 0001
you will only be given one master ball.
You can't do that unless you have emerald. then you can clone the master ball.
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you dont
you get a master ball after beating the team rocket boss for the 1st time he'll give it to you
You have to get all ID number matches to win 1 masterball
Yes, it will be extremely difficult without it.
well, lengrndarys like the birds and mewtwo are hard to catch. but then theres the lengendary dog. personally i used my master ball on moltres and it took only 2 ultras for mewtwo
Nah you can just get 1 Master Ball in a game... if u want more.... jus place the master ball in a Pokemon and trade it... after tht start the game all over and get another master ball :P