How to evolve Lairon in Cobblemon.
Lairon evolves into Aggron when it reaches level 42.
Evolution line
What Lairon needs
1 path
AggronLevel up
Level 42
Is it worth it
Lairon nowsteelrock430
Aggronsteelrock530
Base stat totals, from the Cobblemon 1.7.3 species files.