Battle Team Rocket in Goldenrod.
There IS no Radio Tower in Mahogany town
so you can get past the guy in mahogany town
you go to the lake of rage and talk to lance then go to the scientist in mahogany town then do the base thing then the dude will let you past
Do what he says and explore johto like go to the east side of johto
You have to beat tesmrocket in goldenrod city
There is no Cerlean city in pokemon black
you have to catch lugia at whirl islands.
get a Pokemon with a ressisstance
just go through it wild Pokemon will attack but for me i just ran
there are two things you have to do disabandon team rocket and battle the red gyarodos
nerd
It is past mahogany town you find the HM waterfall and you can catch swinub and delibird but you have to beat team rocket first.