How do you get a Shiney Stone in Platinum?

You can't get a Shiny Stone in Pokémon Platinum. Shiny Stones were introduced in Pokémon Black and White.

Here's what you *can* do to get items to evolve Pokémon in Platinum:

* Trade for them: You can trade with other players to get items like the Dawn Stone, Dusk Stone, and other evolution items.

* Find them in-game: Some evolution items can be found in specific locations around the game. For example, the Reaper Cloth can be found in the Veilstone Department Store.

* Use the "Secret Base" feature: Other trainers may leave evolution items in their Secret Bases. You can find these by checking the map for "Secret Bases" icons and exploring.

If you're looking to evolve a Pokémon that requires a Shiny Stone, you'll need to trade for it or wait until you play a game where it's available.