talk to guy in radio tower
You go on the Pokegear and go all the way to the top of the radio and that's the EXPN card (EXPN card is the poke flute)
The EXPN card is on the first floor of the radio tower in Goldenrod city.
In Pokemon silver after you get the expn card you will get a Pokemon flute melody on the last line of your radio which you can use to awaken the sleeping snorlax blocking the way to the cave that leads to Pewter city
The expn card automatically attaches to your radio now you can tune into kanto radio!
Go to the radio tower in lavender town then talk to the man in the hat and he will give you the expn card
what expn card<-----Why in the world did this person answer this and not know the answer? Anyway you just get it to be able to use the radio on the pokegear in Kanto.
You have to get the expn card to upgrade it
lavender town radio tower
I have been playing my game boy color for a long time trying to find out were to get the EXPN card to activate my radio on Pokemon gold for Game boy color.
He is next to a sign against the north wall. He should give you the EXPN card. The card will allow you to have access to the Pokeflute channel.
Go to lavender town and go in the radio station. Then there is a man facing the wall so talk to him and he will give you the EXPN card.
By Diglett's Cave, east of Vermilion City. You need the EXPN Card's Poke Flute to wake it up, which you get after restoring the Power Plant.