PokéBase - Pokémon Q&A
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3 Answers

5 votes

Very high. I think its every 50 steps you have a chance of one shaking. That's how it works for me.

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0 votes

If you use a Repel, and you go in the Grass, it makes finding Rustling Grass easier.

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If you want to find rustling grass either to train (Audino) or there could be a specific wanted Pokemon just jump on your bike and stay at that patch of grass and it should start shaking.
Hope this helped! :P

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