Mistralton Cave (Japanese: フキヨセの洞穴 Fukiyose Cave) is a cave located on Route 6 in the western half of the Unova region. It can be accessed as soon as the player can use Surf. Flash is needed to illuminate the cave.
It is the home to the legendary Pokémon Cobalion, who resides in the Guidance Chamber. After encountering it, the player will be able to access Terrakion in Victory Road and Virizion in Pinwheel Forest.
In Pokémon Black 2 and White 2, Cobalion no longer resides here, instead taking residence on Route 13. Mistralton Cave can now also be accessed via Clay Tunnel's western terminus.