>Go to Stark Mountain and when you see Buck help him through Stark Mountain by teaming up with him.
Then, he ditches you and greedily takes the treasure!
Now you must go to his house (which is beside the poke center in the survival area) and he'll go to Stark Mountain again, so you follow him and Heatran will be at the end.
If you havent done this then Heatran will not be there, and if you have then beat the elite four again to make him appear again.
