Stark Mountain's Heatran .

In Pokemon Diamond, Pearl & Platinum, Heatran appears in Stark Mountain after the Magma Stone was moved.

In Pokemon Diamond & Pearl, Buck is responsible for it's appearance. Talking to Buck in the Survival Area to lead to the return of the Magma Stone, and Heatran will then appear in the final chamber.
In Pokemon Platinum, Charon attempts to steal the stone but gets stopped by Looker, and Buck returns the stone immediately.
However, Heatran will only appear after the player speaks to Buck in the Battleground in the Survival Area.

The file on this page consists of the Heatran captured in Pokemon Platinum.
It was possible to obtain the shiny Heatran via abusing the Cute Charm mechanic, as it can randomly be male or female.

 

Species		Heatran
Nickname		(default, in )
OT		(recipient)
TID		(recipient)
Distribution		In-Game Encounter
Location		Stark Mountain
Dates		(Various)
PID		Chance of Shiny
Games		Platinum

	Lv. 50

Nature		Random
Ability		Flash Fire (1 or 2)
Item		None

Moves       Metal Sound   Crunch   Scary Face   Lava Plume

Format Ver.1.0.6-1, Post Updated Date:20180223_2355