You have to beat the Elite Four first. Then, Prof. Elm should give you the S.S Ticket to go to Vermillion. Go to Fuschia City and look for the Copycat's House. She'll say she lost her Doll. Go back to Vermillion City and enter the Fan Club to get the Doll. Give back the doll to the Copycat and she'll give a the train pass to access the Magnet Train. You will have to fix the Power Plant before the Magnet Train is accessible.
from what i heard, i think you need to defeat the elite four first, then the Golden Rod train station will be available. This is what i know...
100,000,000,000,000,000
Get a seel then train it.
from the copycat
Train them!
You can now use the train from kanto to johto.
The Pokemon League
Mt. Silver or the Pokemon league
train it
You have to love and train your Pokemon.
No, sadly it doesnt but it does unlock groudon. Hope this helped!
You can not. It is impossible for Heartgold and Soulsilver.