9 Ways to Evolve Onix - wikiHow

Onix is a fairly rare and powerful Rock-type Pokémon that can be found in most Pokémon games. In order to evolve your Onix into Steelix, you'll need an item called Metal Coat. Once your Onix is holding the Metal Coat, trading it will

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9 Ways to Evolve Onix - wikiHow

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