You must defeat Team Rocket in the Radio Tower. Petrel (the guy who is pretending to be Giovanni) will give you a "Basement key", which is the card key.
you get the card key in the bottom floor of the department store in Goldernrod City
The card key in Pokemon Heartgold and Soulsilver is located in the Goldenrod Underground.
the director of the radio tower will give you the card key after you have defeated lambda in the tower he will give you a key so you can open the basement of the goldenrod tunnel. There you must search for the director and he will give you the key
you only get the card in heartgold and/or soulsilver
Its on the pokegear there is a map card.
You need to get the radio card.
pokegear app ONLY IF HAS GOTTEN EXPN CARD
After you get the EXPN card he is right next to the Power Plant.
The expn card automatically attaches to your radio now you can tune into kanto radio!
The Card Key can be found in Silph Co on the Fifth Floor.
no you can trade soulsilver pokemon to black
he is not in Pokemon soulsilver or Pokemon heartgold
mystery giftYou can'tEDIT BY ALLIE207: Mystery Gift on some occasions