Steelix

It is thought its body transformed as a result of iron accumulating internally from swallowing soil.

Its body has been compressed deep under the ground. As a result, it is even harder than a diamond.

It is said that if an ONIX lives for over 100 years, its composition changes to become diamond-like.

The many small metal particles that cover this POKéMON's body reflect bright light well.

STEELIX lives even further underground than ONIX. This POKéMON is known to dig towards the earth’s core. There are records of this POKéMON reaching a depth of over six-tenths of a mile underground.

STEELIX live even further underground than ONIX. This POKéMON is known to dig toward the earth’s core, reaching a depth of over six-tenths of a mile underground.

Its body has been compressed deep under the ground. As a result, it is even harder than diamond.

Tempered underground under high pressure and heat, its body is harder than any metal.

It chews its way through boulders with its sturdy jaws. Its eyes can see in the darkness underground.

It’s said that if an ONIX lives for 100 years, its composition becomes diamondlike as it evolves into a STEELIX.