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I personally think that Rock should be weak to Poison instead of resisting it. When you spill poisonous liquid onto a rock, the rock will slowly dissolve, similar to the reason Water is good against Rock.

A logical answer will do for this question.

Game Freak logic

1 Answer

1 vote
Best answer

Both rock and ground are capable for decomposing anything! Moreover, rocks won't get affected by toxins. And water is strong against rocks because a somewhat strong water current is enough for blowing away rocks within a movement!

Thank you!
Source: My experience and this

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