Aron evolves in to Lairon at lv 32 then Lairon evolves in to Aggron at lv 42.
42
level 42
larion evolves around level 50 to 70
Aron--lv.32--Larion Lairion--42--Aggron
aron evolves at lv 32 larion evolves at lv 42
Aron will evolve into Lairon at level 32, then into Aggron at level 42.
lairon evolves to aggron at lvl. 42 and aggron does not evolve
Lairon will evolve to Aggron at level 42.
it evolve at lv 43
On level 32 he evolves into Larion. Source: Serebii.net
Lairon evolves into Aggron starting at level 42.
It can evolve at level 32 into a Lairon. Then Lairon will evolve into Aggron at level 42