How long does it take a Hidden Grotto to reset?

Question

It's all in the question name.

Answer 1

256 steps. The chance it resets is not guaranteed, but it has a small chance to do so every 256 steps. If it resets, 40% it will be an item, 40% it will be a hidden item and 20% that it will be a Pokemon.

Source

Comments

That was quick! Thnxs.

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Theres a 5% chance every 256 steps