How to evolve Onix in Cobblemon.
Onix evolves into Steelix when traded to another player, or when you use a link cable on it while holding a Metal Coat.
Evolution line
OnixWhat Onix needs
1 path
SteelixLink cable or trade
Holding Metal Coat
Is it worth it
Onix nowrockground385
Steelixsteelground510
Base stat totals, from the Cobblemon 1.7.3 species files.