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Stark Mountain is a large volcanic mountain introduced in the Sinnoh Generation IV games that is home to many Fire-types, including the legendary Heatran. The mountain is full of opportunities to double battle. The mountain consists of three rooms: the opening room, (no trainers, except for Team Galactic during the first visit in Platinum), the huge body room (full of trainers, mostly double battles), and Heatran's room (only Team Galactic in Platinum). After the player's first visit, he/she can return to the Survival Area and talk to Buck and head back to Heatran's room and catch it. Mars and Jupiter's last appearances before they disappear are after the player captures or defeats Heatran.