go to the two orangeish buildings
Defeat team rocket at the game corner to get the silph scope.
In the game corner
Officially, no. But there are some fan games/ROM hacks that have you play as Team Rocket; some good examples are Pokemon: Team Rocket Edition (a hack of Red) and Pokemon Rocket Strike (a hack of FireRed).
The purpose of going into the game corner is so you can infiltrate the Team Rocket base in the basement.
you have to save at a Pokemon center in your gba game and then trade over Pokemon.
A rocket grunt drops the key on B3.
it's TM 24 at the team rocket game center
At the end of the team rocket lair found after beating the ROCKET at the back of the GAME CORNER
Defeat team rocket at the game corner to get the silph scope.
you figth gyovany in the game corner by the rocket poster
She is in Saffron City, but first yu must beat team rocket at the rocket game corner and at Slith co.
You have to beat Giovanni in the Secret Basement beneath the Rocket Game Corner.
To get to the Team Rocket base underneath the Game Corner you have to press "A" on the poster that the Team Rocket Grunt was facing near the coin purchase counter.
You can't join team rocket in Pokemon diamond. Actually team rocket is not on the game
You need the Silph Scope, which you get after defeating Giovanni in the Rocket Game Corner basement.
You fight the team rocket in the Rocket Game Corner by pressing the switch behind the the poster in the Game Corner and Fight Giovanni and he will leave the Silph Scope behind. In Generation I (Red, Blue, Green, Yellow) you obtain the Silph Scope in Rocket Game Corner in Celadon City. You must beat Giovanni, and he drops the scope. You have to beat Giovanni at the game corner in Celedon City, just SW of the Pokemon center. Make sure you have room in your bag (so before you fight him, visit a Mart and sell some stuff). He's easy if you are any good and have some water Pokemon. i think you need to talk to a guy at like a fan club
In the game corner