You beat the seventh gym leader then go get the team rocket costume from in the tunnel in Goldenrod then you go beat teamrocket in the tower. The elevator will not work unless you have rotom though.
you go to the Kanto radio tower in lavender town
I don't believe this is possible, as they tightened security after Goldrenrod's Radio Tower incident (Source the guard at the bottom of the stairs).
There is no way for you to get past the Guard that's blocking the staircase in the Radio Tower in Lavender Town in "Pokémon SoulSilver."
Do you mean the Power Plant? Are you looking for the way to activate your radio in Kanto? That can be done at the Power Plant.
cheat
he never goes away
You cannot get past the guard at the Kanto radio tower. He is there permanently for the entire game, no matter how much of the game you manage to defeat.
The Kanto radio tower is in Lavender Town.
you go to the Kanto radio tower in lavender town
lavender town
You can't
Lavendar town.
Lavender Town> Radio Tower> Someone
You don't there is nothing beyond the guard.
In Lavender Town, where the radio tower is, there is in old man inside and he will give you the Kanto Radio card (if it is your first visit)
I don't believe this is possible, as they tightened security after Goldrenrod's Radio Tower incident (Source the guard at the bottom of the stairs).
There is no way for you to get past the Guard that's blocking the staircase in the Radio Tower in Lavender Town in "Pokémon SoulSilver."