its a little easy and hard you have to go to the goast/spirit tower when your in try to go to the top you will first battle gary in the 2nd floar.When you get to a stair case that wont let you in a pokemon is blocking the way and I know how to capther it and make him go away.
.Make him go away.
1.first go to celadon city and go to the mart/store and buy a poke doll ok when u have it go to spirit/goste tower and use the doll when you are battling the pokemon and he will flee.When you go upstairs you have to battle like 1 to 5 or 6 rockets then when you beat them all you have to battle team rocket when you defeat them they will go and a man will be at the end of the floar he will say you saved me you sould com to my house then when you are in his house he will give you a poke flute

you need to bet the rocket boss and get the siphl scope and fight a ghost the talk to mr. fuji and he'll give it to you