At the ruins in Celestic Town you first have to defeat the grunt blocking the pathway to the ruins. After you have defeated the grunt Cynthia's grandmother will come . If u kept the old charm in your bag she will ask to see it. After u give it to her she will give you a tour of the ruins . As she is giving you the tour she will give u some scoop about the fresco and the history of Sinnoh . Than she will give you HM03 which is surf.
