When i went to stark mountain in pokemon diamond to catch heatran he wasn't there where is he?

Question

i went there with that girl your partner and when a got to the dorr where heatran is she went in side then i went in and so no heatran and my partner sai d to me i got the magma plate and then she went wat do i do?????????????????????????????????????!...

Answer 1

Go back out of stark mountain to the survival area, then go in one of the houses and the girl will be there, you have to talk to her and then go back to the cave and heatran will be there. Heatran is quite hard to catch by the way so save before you battle him. Hope that helps

Answer 2

in a cave there i think

Answer 3

you have to go out of this place and see the girl and then go back through the cave and it will be there this tricks alot of people