ruby/sapphire you can go to a site called serebii.net (if your talking platinum you can still go to that site)
Aron will evolve into Lairon at level 32, then into Aggron at level 42.
Aron-->Lairon-->Aggron
Train Aron.
lairon the aggron
Lairon or Aggron
Aron--lv.32--Larion Lairion--42--Aggron
you have to evolve aron to a aggron
His known Pokemon are Aron, and Aggron.
it envolves into lairon then into aggron
You cant capture an aggron..though u can raise an aron to become an aggron..go to dewford island..and there head to the north west side ..and enter the cave..in the cave u will find plenty of aron..:)
aron evolves into lairon at lvl 32 and then into aggron at lvl 42
Aron evolves at level 32 to lairon and Aggron at Level 42