How do you get a cool black outfit for Pokemon soul silver to get past the team rocket goon in the radio tower?

okay well my memory's bad but this is what I remember, go to the northern part of the underground tunnel in Goldenrod city and talk to the Rocket Grunt that is standing near a door. Talk to him, and he will give you a Team rocket outfit.

Go to the radio tower and the Rocket grunt will let you in, until your rival comes and ACTUALLY sticks up for the towns people. (Guys, c'mon, I was Shocked. This guy isn't supposed to care, at all). But he reveals your identity then runs away. Defeat everyone you can get to (Because it's easier that way), until you get to one of the rocket executives who is mimicing the radio tower manager person. He'll give you a key to unlock a door in the southern part of the underground tunnel in Goldenrod City. Beat everyone in there. And also be prepeared because you'll run into your rival again (yay, fuuuun) and I'm pretty sure he'll battle you. If not then my bad. Talk to the REAL manager guy and he'll give you a key to unlock the door in the Radio Tower so you can battle all the other super fun Team rocket Executives. And don't stress they're not very hard, Most of them have 3 Pokemon Max.

--- Sorry it's so long ---