If your talkin about heart gold/ soul silver, you have to go to the radio tower in goldenrod city and take a quiz where Whitney is.
You get a radio card at the Goldenrod radio tower by completing a five question quiz.
It allows you to listen to the radio.
Get the Radio Card from the Radio Station.
A radio rate card is a listing of all of the advertising spots available for sale on the radio station and their corresponding prices. They are usually found somewhere on the radio website.
you get the radio card in the radio tower in goldenrod city,talk to the third lady on the first floor and she ask for you some answers and at the end of the questionaire the lady gives you the radio card.
First go in the radio station and there will be three people there. Go ask the third one or the second one. answer his questions and you get the radio card.
The expn card automatically attaches to your radio now you can tune into kanto radio!
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)
theres a guy with a hat in the radio tower speak to him you will receive the card and move the circle thing in the radio at the top you will hear pokeflute
In the radio tower after you answer a quiz
there are only 2 radio cards!
u get it from the person in the radio-tower