There are several evolutionary items you’ll need to find to evolve your Pokémon. The Shiny Stone is one of many evolution items. If you’re trying to get the sleep and Toxic-specialist Roserade or the flying-flincher Togekiss on your roster then you need to track down a Shiny Stone. This walkthrough will show you where to look for a Shiny Stone in Pokémon Brilliant Diamond and Shining Pearl.
#1: Pickup
The fastest way to find a Shiny Stone is to capture a Pokémon with the Pickup ability. If your Pokemon ( like Pachirisu ) has the Pickup ability and are in your party, they can pick up items for you as you travel.
#Abandoned mine on Iron Island
In Canalave City, go to Sailor Anchors Aweigh and sail to the Iron island for free. Head inside the abandoned mine and go right at the first fork to enter a large area. Go to the bottom right and take the elevator to go down.
In the second large room again, stick to the right side and go to the bottom and take the elevator to go down. In the next room take another elevator to go up to find Shiny Stone.
# Route 228
In the post-game, after you’ve defeated the Elite Four you can find another Shiny Stone on Route 228 above the Resort Area. From the Resort Area head to Route 228 in the north direction. You will see the sand storm kick in. Pass the first mudslide and at the second mudslide hop on to Bike and switch on Mach mode. Cross the beam to get the Shiny Stone.