Defeat Giovanni in Celadon Game Corner and he will give you it.
You can't first you have to get a sliph scope
he is in the Pokemon tower you have to beat Giovanni in the arcade in ceadon city then you get the sliph scope to look a ghosts
to get the sliph scope you have to go to safron city to the team rocket warehouse and defeat the boss and he will drop the sliph scope and you have to pick it up (it is inside of a poke ball)
Defeat Giovanni In The Sliph Co. And It Is Gonna Be Unlocked.
Go to the Silph Co. in celadon and get the sliph scope.
you get after you beat giovanni in the celadon city game corner
The silph scope is not in silph co its in the game corner.
You have to beat Giovanni in the Secret Basement beneath the Rocket Game Corner.
After defeating Giovanni at his Rocket Headquarters in Celadon City he should give it to you.
You have to get the Sliph Scope from the Sliph Co. Building after you beat Giovonnie
in Pokemon tower using your silph scope
You have to go to Silph Co in Pokemon LeafGreen. You have to go there to get the Silph scope, which you need to advance.