Trade it while it is holding metal coat. You can only do this when you have obtained or upgraded your pokedex to national mode
you trade your onix with it holding a metal coat
Onix > trade w/ Metal Coat > Steelix
A metal coat makes an Onix evolve into a Steelix.
Steelix
Steelix
No, Steelix is the evolved and final form of Onix
Trade it while holding metalcoat. By sujay in TAMILNADU
If you mean,, what onix evolves into,, it's steelix,, but the is no Pokemon that evolves into onix
Onix does not evolve by level, it evolves into Steelix by trade whilst holding a metal coat.
onix evovles into steelix
Steelix.
well onix can evolve if you have a metal coat is onix has the metal coat on it if you trade it with a friend and you friend gives it back you will have a steelix.