Stark Mountain

20 Pokémon can be caught at Stark Mountain in Sinnoh — highlighted on the map below.

Rising at the northern end of Sinnoh's Battle Zone beyond Route 227, Stark Mountain is a volcano whose deepest chamber shelters the Legendary Pokémon Heatran. Traversing its caverns demands both Strength and Rock Smash. In Diamond, Pearl, and the remakes, the player's rival sulks at the entrance after losing to Buck, who then joins the player through the main cavern in his hunt for the Magma Stone before claiming it and departing; in Platinum, Charon takes control of events here.