Non-repeatable - Azalea Town (Gift from the charcoal assistant after obtaining HM01) - Ruins of Alph (Hidden room in upper left entrance 2)
Charcoal (Bulbapedia)
I think in heart gold it is the same thing as soul silver if it is you can find that item in azalea town in one of those woods,the one in front of the charcoal kings house just run and perss A on that wood.
