I haven't played Pokemon Platinum Version before
You have to trade Magmar holding the item Magmarizer.
you can't get him you can get a magmar.
There is no girl
To get magmar to evolve, you have to give it a magmarizer and trade it to someone else.
how to evolve golbat in platinum.. how to evolve Scyther in platinum. how to evolve electabuzz in platinum. how to evolve magmar in platinum.
At Fuego Ironworks
in the fuego ironworks
Magmar is the one that loves the Magmarizer because it's capable of allowing Magmar to evolve into Magmortar once you have given it to Magmar and then you have to trade it in order to evolve it.
You can evolve a Magmar in Diamond, Pearl and Platinum by trading it while it's holding a Magmarizer. However, Magmar cannot evolve in Pokemon firered and Leafgreen.
in front of the fuego ironworks
With The Magmarizer You Can Evolve Magmar into a Magmortar.
Level 28 or 29.