Question

When can I use Rock Climb outside of battle in HeartGold?

Comments

You should be able to as soon as you get it from Professor Oak after defeating the Kanto gyms...

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Luna, you should have answered.

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Yes, I should have. And now I have.

Answer 1

You should be able to use Rock Climb as soon as you get it from Professor Oak after defeating the Kanto gyms.

Hope I helped!