Heatran

Heatran is a legendary Pokémon that lives deep inside a volcano in Sinnoh. Although he is practically immortal, which is the case with all legendary Pokémon, and is relatively young compared to his fellow legendaries, he seems to be rather old; speaking in an aged voice and remaining dormant almost constantly. He is first introduced in Chapter 2 of Stun.

He used to have a great deal of fire Pokémon as his followers, before they were possessed by the darkness and began following Groudon.

Heatran was one of the many legendary Pokémon to be captured by humans between the events of Stun II and Project Stun.