It is in a cave down of snow town
Aron evolves into Lairon at level 32.
Train Aron.
you dont
lv 42
the cave under cycling road
you can trade from platinum after you get the national Dex
He's on route 023894 3
fuego ironwoks (use poke radar)
iron island after u get the national dex not complete it
u use poke radar at fugo iron works
You have to use the PokéRadar to get it. It only appears in Diamond and Platinum, though.
You'll find it in Fuego Ironworks, must use the Pokeradar.