When you the game,make sure you don't sell your golden nuggets because if you do you won't a chance of geting a shiny pokemon. Back where I was make sure your golden nuggets is the first item. Then go to the battle frontier, in snake place then talk to the girl > that side first then talk to that wants you to fight don't press 50 or up level, only press b. Then when your done go to a place with grass and search for a shiny pokemon. And the more golden nuggets the more having a shiny pokemon. It works.