Well, WHERE!?!? cuz theres ALOT of grunts all over the game!
In order to double team you. -pokeman
First , Get a Team Rocket`s Outfit , In the Underground path , in Goldenrod city , (By talking to a Team Rocket Grunt , That will give you it ), Then , Get it the Radio Tower , Then , talk to The Team Rocket`s Grunt that is blocking the pass , He will think you are a new Team Rocket`s Member , But after, Your Rival will come and tell the Grunt that you are not a Team Rocket Member , Then you will have to battle him , Then clear the tower and save the Director .
After you repair the Power Plant, Team Rocket is no longer in the way. If you listen to the Rocket Grunt who stole the Power Plant part, he will recognize that Team Rocket has once again disbanded because of you. He then leaves disgruntled, and Team Rocket is completely disbanded.
you enter radio tower then you see a team rocket grunt then you talk to him the your rival will come and blow your cover then you battle every one in the tower :)
in the gym
First , Get a Team Rocket`s Outfit , In the Underground path , in Goldenrod city , (By talking to a Team Rocket Grunt , That will give you it ), Then , Get it the Radio Tower , Then , talk to The Team Rocket`s Grunt that is blocking the pass , He will think you are a new Team Rocket`s Member , But after, Your Rival will come and tell the Grunt that you are not a Team Rocket Member , Then you will have to battle him , Then clear the tower and save the Director . *Hope it helped , Kruh .
You can then go into the Radio Tower where the grunt was blocking you. He will let you past if you are wearing the uniform.
The first Team rocket grunt is by the stair case. So you have to go down to the underground road and a Team Rocket grunt will give you a uniform put it on and he will let you up the stairs. Keep going on after that.
Where the Pokemon Salon is, a newcoming Team Rocket Grunt will give you the Team Rocket uniform.
once you have 7 gym badges go to goldenrod city. team rocket will have taken over the radio tower. first get the team rocket uniform from the grunt in the tunnel. then work your way up the tower. at the end you'll have to battle the executives. once you beat them they'll disband team rocket again.
By going into the Goldenrod Tunnel and going to the Team Rocket Grunt and then he will put you in a Team Rocket Costume.
Go to the Underground Tunnel in Goldenrod City. There is a Team Rocket Grunt there who will give you a uniform.