Onix > trade w/ Metal Coat > Steelix
Onix does not evolve by level. It can evolve by being traded while holding metal coat.
You have to trade him
onix evolves when u trade it with an item called Metalcoat
cant answer look an serebi.net and PS its heart gold
Onix doesn't evolve from anything. It evolves into Steelix, but Onix is the base pokemon for that evolution chain. :)
It doesn't evolve by level, but rather, by trading it while it's holding a Metal Coat.
To evolve onix you must give it a metal coat then trade it and it will evolve
you have to trade it for it to evolve with metal coat. but heres an idea just get a wild Steelix
Trade Onix with the steel coat item to evolve it.
a stone onix will evolve into a stone steelixs?
In order to evolve Onix in Pokemon Crater you must beat Cynthia. After beating Cynthia she will give you the mental coat to evolve Onix.
In Pokemon Yellow Onix does not evolve, it is a one stage Pokemon.