There is 2 ways you can do that: One go to BAG and locate the Metal Coat item then press A on it then press A on GIVE then press A on Onix, Two go to POKEMON then press A on Onix then press A on GIVE then press A on the Metal Coat item.
Chat with our AI personalities
onix has to be traded and be holding metal coat
Trade Onix to someone with metal coat attached.
you trade your onix with it holding a metal coat
Trade onix while it is holding metal coat
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.