go to the Silph Co building in Saffron City where Giovanni has taken control of the building and he held hostage the president of Silph Co. after defeating Giovanni, the president will give you a master ball.
In Silph Tower
In Lavender town's mart.
cinnabar island
Mewtwo I guess????
No, you do not need a Master Ball in order to enter into the Viridian City Gym which is also Giovanni's Gym, you are not required to use the Master Ball or currently have the Master Ball in your possession in order to accomplish anything in Pokémon Yellow.
ewan Koh>... halA KEo!!
no. you actually dont. But I caught him with a master ball because I have 999 Master Ball. My brother caught it with a poke ball on yellow. Shake your DS and it will be easier to catch.
somwhere in the game you go up n down the street and it will keep saying you got a master ball
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Yes but you can only get 1.
You use the master-ball on it, try to weaken it first as this will make it esier to catch.
throw a master ball throw a master ball (i dont have a master ball) from tanman07