Where do you find shiny stone in leafgreen?

You can't find Shiny Stones in Pokemon LeafGreen. They were introduced in later generations.

LeafGreen only has the following evolution stones:

* Fire Stone: Found on Route 17, near the entrance of the Victory Road.

* Thunder Stone: Found on Route 26, near the Pokemon Center.

* Water Stone: Found on Route 20, near the Pokemon Center.

* Leaf Stone: Found on Route 12, inside a small cave.

If you're looking to evolve Pokemon that require Shiny Stones, you'll need to trade with a game from Generation IV or later.