Magma Stone

The Magma Stone is a red stone that was created long ago when boulders melted together in hot magma, then hardened into one stone. Remains of the magma is sealed inside the stone.

Description
The Magma Stone once said that it had to power to control the Legendary Pokémon, Heatran, who resides in Stark Mountain.

Locations

 * Diamond and Pearl: The Magma Stone can be found in Stark Mountain.
 * Black and White 2: The Magma Stone can be obtained at Unova Route 18. If the player takes the stone to Reversal Mountain, the player will capture Heatran.