By trading it while holding the item Metal Coat.
it doesn't -_-
there is no level for onix to evolve it will evolve if u trade it to another game make sure it holds a metal coat or it will not evolve
sorry doesn't evolve in leaf green
You can't. You have to trade it from a FireRed/LeafGreen game. To get it on FireRed/LeafGreen you have to evolve Onix with a Metal Coat.
Onix does not evolve at any lvl. You have to have it hold metal coat and then trade it. Then you will have steelix. Same goes for syther to evolve to sizzor.
You have to trade it while holding a metal coat.
Onix doesn't evolve from anything. It evolves into Steelix, but Onix is the base pokemon for that evolution chain. :)
To evolve onix you must give it a metal coat then trade it and it will evolve
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.