Epic Mickey 2: The Power of Two

You emerge from the Dark Beauty Castle onto Mean Street South just after you set the fireworks off in the castle. To get to the other side of Mean Street you need to travel through the underground cavern with Oswald and through the other side. When you emerge, you will make your way up to Mean Street North so do some speaking and find some scrap metal by helping local shopkeepers repair their components and give the Scrap Metal to Gremlin Jamface by the windmill. He will repair it and give you access to the first D.E.C in the game so enter it and the trophy will unlock.