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Sturdy
Rock Head
Protects the Pokémon from recoil damage.
Sturdy
The Pokémon cannot be knocked out by a single hit as long as its HP is full. One-hit KO moves will also fail to knock it out.
It is said that if an Onix lives for over 100 years, its composition changes to become diamond-like.
It is thought its body transformed as a result of iron accumulating internally from swallowing soil.
This Pokémon evolved through use of a strange item. Its body is coated with steel powder and notably hard—not even diamond can leave so much as a scratch.
