You must Trade Onix while it is holding a Metal Coat in order to Evolve into a Steelix.
Onix evolves into Steelix when it is holding a Metal Coat and traded to someone else.
Pokemon Tower Defense is 1st generation pokemon only, so no fourth generation or second generation evolutions (including Steelix). Therefore, Onix can't evolve.
Onix holding a metal coat,Karablast trade with Shelmet will evolve too.Thats all I know.
the way you can evolve an onix is by letting it hold a metal coat and trading it to a friend and then making them trade it back onix evolves when your trade parterner receives onix.
Rocky is the nickname for an Onix. You get it from trading a Bellsprout in Violet City.To evolve an Onix into a Steelix, trade it while it's holding a Metal Coat.
Onix > trade w/ Metal Coat > Steelix
You need to give it metal coat and trade to evolve it to Steelix.
Trade it whilst it is holding a Metal Coat.
ONIX DOES NOT EVOLVE BY LEVEL! To evolve Onix, equip a Metal Coat and trade it over to another game. Find trade evolutions frustrating? You can just trade any Pokemon for Jasmine's Steelix.
onix dose not evolve!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! (quote of above comment) yes it does it evolves into steelix! onix evolves after trade holding metal cover
In Pokemon Yellow Onix does not evolve, it is a one stage Pokemon.
in caves
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.
Onix doesn't evolve from anything. It evolves into Steelix, but Onix is the base pokemon for that evolution chain. :)
Trade Onix with the steel coat item to evolve it.
To evolve onix you must give it a metal coat then trade it and it will evolve
There is no Pokémon that evolves into Onix.