Where do you get a magnet train pass in Pokemon heartgold?

To get magnet train pass, you have fix a problem in at power plant first.. Now, go to copycat house in saffron city and talk to her.. Then fly away or just walk to vermilion city Pokefan center..Talk to everyone and you will get a clefairy doll.. Give that doll to copycat girl N take the magnet train pass..