You go to the tunnek and talk to the photagrapher guy.
Chat with our AI personalities
you can not do that sorry
One you cant keep the outfit. Two its in the underground tunnel in goldenrod city. And three you get to take a picture with your Pokemon party wearing the outfit.
In Heart Gold and Soul Silver, you go to the underground in Goldenrod City and meet some random guy from Team Rocket who gives you a Team Rocket uniform, believing that you are a new person in Team Rocket. However, once you get it, you can't use your bike or leave the city, and can't use the suit after your mission.
You can't find team rocket anymore after the one grunt in Cerulean city.
in a ring in the gym you'll find a thing that helps