you go to stark mountain with buck then go to her house in the survival area
No
stark mountain
in stark mountain
After buck has gone back into Stark mountain with it you go back in talk to him he leaves you take the magma stone and Heatran apppears (lvl 50).
You can only find a Magma Stone in Pokemon Black 2, White 2, Pokemon Diamond, Pearl, and Platinum. It is not available in Pokemon Black and White.
You can catch Heatran in stark mountain. You end up defeating team galactic and you lead buck to the magma stone. Heatran will appear after you speak with buck in the back of stark mountain. I think your thinking of Diamond or Pearl, I tried it in Platinum. Doesn't work.
you can get a magma stone with buck at stark mt
It is not possible to get a Magma Stone in any game.
It is possible if you will wear a special suit getting the magma stone. When the stone is already cold also then you can get it.
Visit stark mountain a second time and you should battle heatran and keep the stone. I do not know completely because I have platinum
To find a shiny stone in platinum you have to dig in the underground tunnel.
You don't get the magna stone from buck in Pokemon platinum.