You cannot, you have to trade from white
You can find Aron only in Diamond.
Aron is found in the Granite Cave.
you can either get it from previous games or trade it over from pokemon white. see serebii.net for more info.
You need to trade from white
Lairon thrive in the Safari Zone. Breed to get Aron.
You have a 1/8000 chances to see any shiny Pokemon find an area where you can find Aron alot and wait until its shiny then catch it.
find an Aron and evolve it twice
Yes.
stupid Aron is a trainer not a Pokemon
aron you say? towards the top of peril cliffs, that's where you'll find it aron you say? towards the top of peril cliffs, that's where you'll find it
You can't find Aron in Pearl, you must trade from D/Pt/R/S/E.
Aron is a Rock and Steel type pokemon.