Is there an easy way to get HA Pokemon in ORAS?

Question

I've been looking for HA Pokemon for hours and still nothing', is there a percent chance of HA and is it rare? And how could I easily get one with a HA?

Answer 1

Dex Nav
Keep encountering shaking grass Pokemon through dex nav.
After 10 encounters of the same Pokemon it has a chance of finding HAs

Comments

How high is the chance?

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It starts at 5% at Search Level 10, but it increases as you encounter the Pokemon more. It peaks at 23% at Search Level 100. http://bulbapedia.bulbagarden.net/wiki/DexNav#Benefits

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Thank you :D