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Deals damage and has a 10% chance to boost the user's Defense by one stage.
While a Defense boost may seem like a valuable asset, Steel Wing's low accuracy and an only 10% chance to get that boost make it unreliable. Furthermore, Steel Wing is discouraged due to Steel's terrible offensive coverage.
Iron Head is a more powerful alternative with a chance to flinch the target.
Meteor Mash is a much more powerful alternative with a chance to raise the user's Attack.