climb it
To get to spark mountain you have to beat the elite four then, go to the resort area and work your way up to the mountain.when you get to the mountain there will be some rocks blocking your way but there will be one rock that looks out-of-the-ordinary, you have to get on your bike and go 2 the right of the rock and ride up the rock with your bike/the rock is like a ramp.and there you are over the rocks blocking your way. :) hope i helped.
Catch all the legendary pokemon. If you are already done with that, create your perfect team, level up pokemon, etc.
you cant fight buck in Pokemon diamond and pearl,But you CAN In the battlefield in the survival arena after going up stark mountain and battling heatran on Pokemon platinum....When ever it comes out!!!!!
To find the stone in the mountain meet up with buck and double duel as many people as you can... then you will know where to go....
it's spelt heatran and you get it from stark mountain. Buck will be there and you chase him. He will end up in a house in one of the 3 town up there.
Skarmory is found on the path leading up to Stark Mountain. This is a hard catch, so pack some powerful balls and good pokemon.
It is on a mountain that is outside of oreghburg city and you have to face team galactic. If you have already beaten it then talk to dawn outside the professor's lab and she will tell you if it is up on the mountain.
You use it on a porygon and it will evolve.(Pokemon Diamond, Platinum, and Pearl only.
The charcoal item in Pokemon Diamond powers up your attack by 20%.
Train your pokemon.
By leveling up your Pokemon from eggs.
in the Pokemon diamond and pearl versions i know that the heatran (mostly a girl) will be at stark mountain go up there with buck go out talk to buck and his grampa go back up to stark muntain heatran is there