I'm not quite sure what your talking about, but I would have to say that you would not have to catch it in a Master Ball.
With a Master Ball.
you get a master ball and catch it that way
No, you do not need a master ball, if you get it to a low enough hp, you can catch it with an ultra ball. You can find mew in the end of the cave in cerulean.
With a Mew you have to catch him with a Master Ball
You catch it in the Master ball that you got earlier in the game.
first you must hurt him and then you can catch him with ultra ball but he may use recover then you must hurt him again then you can catch him with ultra ball and 5% possibility to catch him with pokeball
You use the master-ball on it, try to weaken it first as this will make it esier to catch.
You probably can but first try using a MASTER BALL.
It is in Cecleun cave after you have got all 8 Kanto badges. It is at level 70 and you can catch it with a dusk ball or a master ball.
You can't, there's only one time to catch it, and only one way; Master Ball.
U have to beat the elite four and then go on a secret boat and go to faraway island.You will find mew at that island in the grass it will run away so chase mew and when you find it catch it with a master ball!or a ultra ball!thats how u catch mew!
no u don't because when u get them to sleep many times there power get's week and your chance get's stronger I caught my mew with a quick ball