How do you evolve Onix?

  1. Because i can't get mine to evolve.

    User Info: Joe1321

    Joe1321 - 7 years ago

Top Voted Answer

  1. To evolve Onix into Steelix, you need to trade it while it's holding a Metal Coat. After the trade, it'll evolve, and you'll just need to trade it back.

    User Info: th3l3fty

    th3l3fty - 7 years ago 2 0

Answers

  1. You need to get Metal coat which can be found on the ss Aqua in Kanto (Vermillion City). Let Onix hold metal coat then trade it from gameboy to gameboy and back again. You should have a Steelix. There is no other way that I know of that you get a Steelix

    User Info: ridleyx1290

    ridleyx1290 - 7 years ago 1 0

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