You can only get it by:
Transfering it from Transfer Lab in Route 15.
Trading for it.
Or evolving Lairon
Aggron is a Rock and Steel type pokemon.
Aggron is a steel type Pokemon
You cannot just go out and catch an Aggron but you can get a Lairon to evolve when it is a somewhere between lv.40 and lv.45.
Yes, he does evolve. It is into aggron at level 42 ( I think)
In Pokémon Sapphire you cannot find Aggron however you can find Aron in Granite Cave and in the Victory Road and then you can evolve it at Level 32 into Lairon and then you can evolve Lairon at Level 42 into Aggron additionally you can find wild Lairon in three areas within Victory Road in Pokémon Sapphire and then you can evolve it into Aggron.
aggron is weaker than heatran by a mile simply because heatran is a legendary Pokemon
His known Pokemon are Aron, and Aggron.
The first Pokemon were Aggron and Arbok.
Train Aron.
Heck yeah
Lairon or Aggron
lairon evolves to aggron at lvl. 42 and aggron does not evolve