Beat the boss in silph co he's on the 11th floor.
You have to beat team rocket in Silph Co
challenge the saffron gym (psychic type gym leader)
Go to Saffron City and beat Team Rocket in The Silph Co. Building
go to lavender town,go to the tower,beat your rival,get to the top of the tower,save the old man from team rocket. THEN go back,the guard is sleeping,go inside and beat team rocket.
She is in Saffron City, but first yu must beat team rocket at the rocket game corner and at Slith co.
you get it in saffron city after you beat team rocket in celadon game corner and at silph corp.
Go to Saffron and beat Team Rocket in the Silph Co. Building.
You need to beat the Team Rocket inside the Silph Co.
yes if you are in saffron wander around and a nice lady or man will give you one after you beat team rocket
you have to beat the team rocket boss giovani. he will be in the biggest building insaffron city. then you will be given a master ball and team rocket will leave the city. then go to the gym and beat sabrina. but be careful, she uses psychic pokemon.
well she isn't a boss. shes the gym leader. you have to beat the twoer of team rocket then go into her gym and beat the pattern of teleporter pads.
If you beat him in Rocket hideout, go to Saffron City. If you beat him in Silph Co., go to Pokémon Tower, if you beat him at Viridian Gym, go to the Pokémon League.