First you must get the card key which is on floor 5 or 6 then go to floor 3 then open the gate sorta to the left there is a rocket near it and there is a teleporter go to it and you will arrive on floor 7 but in a secret room with your rival in it you must defeat him then talk to the man nearby and he will give you a lapras then go to the teleporter closeby then you will arrive on floor 11 now defeat the rocket and defeat Giovanni and there you go and also after beating Giovanni speak with the president and he will award you the master ball.
You have to get to saffron city and defeat the team rocket in Silph .co defeat the team rocket boss giovanni and then the boss of silph gives it you as a reward
Go to the game corner, talk to the guy/poster to get attacked by a grunt then work your way to Team Rocket Boss. He'll give it to you.
The boss rocket drops the silph scope after defeating him in the rocket hideout.
B4 of the rocket game corner defeat the boss rocket to get it.
Beat the team rocket boss in silph co.
The boss of team rocket leaves it behind after defeating him in the rocket game corner.
11 floor
In the Rocket Hideout which is based below the Celadon City Game Corner, defeat the Rocket boss and he will leave behind the Silph Scope.
After defeating the boss rocket in the rocket game corner he will drop the silph scope take it then leave.
Defeat Team Rocket's Boss in the game corner he will leave the silph scope behind take it then leave.
Go through the rocket game corner and defeat team rocket's boss Giovanni once he goes away an item will appear take it its the silph scope.
This is an item dropped by the team rocket boss at the game corner.