You decide because that is the end of the game
After beating team galactic at stark mountain go catch heatran.
there is no stark mountain. stark mountain is only in DPP
You have to go to Stark Mountain to get him.
he goes back to that old guys house on the route before stark mountain.
at stark mountain. you have to beat team galactic and go thur stark mountain again. (buck, the guy that follows you, will put the stone back after you get it) YOU MUST SEE ALL 210 POKEMON BEFORE YOU GO TO STARK MOUNTAIN (HEATRAN IS THERE)
It's a long and VERY infurinating process, but I promise you Heatran is worth it when you're done: When you get to the survival area, go to the house west of the Pokemon center. Talk to the old man then go to stark mountain. You'll meet Buck, and he askes you if you can go with him. He'll steal the magma stone, and run away. Go out of Stark Mountain and go back to the old man's house. Buck is the old guy's grandson. He tells Buck to return the Magma Stone. So you go back to Stark Mountain again. Go to where Buck stole the stone. You'll see him return it. Go out of Stark Moutain again. Go back to Stark Mountain to where the Magma stone is. Heatran will be there.
Heatran is encountered at level 70. Heatran lives at the top of Stark Mountain. Go to the top of Stark Mountain with a trainer named Buck. Buck will then take the Magma Stone and leave Stark Mountain, which causes the mountain to act up. Talk to Buck at his house, and he will put the stone back. Go back to the top of Stark Mountain and Heatran will be there in the place of the Magma Stone.
You have to go to the Battle Area after you beat the Elite Four, and you will see your friend. He will meet a man and they will go to Stark Mountain. Go in that direction and use the map to help find your way.
Find a orb and battle cyrus,mars, and jupitor.P.S. sorry if my spelling is wrong or if my words are together my space bar is not working sometimes
go to stark mountain with a firered
go to the survival area, and explore!!!!
Go to the end of stark mountain, and heatron will be there.