Long before thePokémonfranchise introduced the idea of Terastalization, there was a first-generation Pokémon that was made entirely out of crystals.In thePokémonanime, there exists a unique Crystal Onixthat has captured the interest of numerous fans over the decades. With its unusual appearance being a big mystery in thePokémonfranchise, players have hoped that there will be answers as to how this particular Onix came to be.
What makes Crystal Onix particularly special is the fact that it was created during a time when the idea ofPokémon having regional variantshadn’t even been conceived yet. Not only does this Onix have a unique appearance, butits typing is also different from the Onix that are typically found elsewhere in other regions. This has made many wonder just what exactly is going on with this Crystal Onix, and if it will ever appear in thePokémongames.

What Is Crystal Onix In Pokémon, Explained
An Unusual Phenomenon In The Pokémon Anime
The Crystal Onyx debuted in the 87th episode of thePokémonanime under the same name.This episode features Ash and his companions Misty and Tracey searching for a unique Onix that is rumored to be made entirely out of crystalin the hopes of helping a boy named Mateo regain his inspiration for making glass Pokémon statues. This special Onix is eventually found in a cave on Sunburst Island in the Orange Islands near Kanto.
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Besides appearing to be made entirely out of glass, there were numerous other unique aspects of this Crystal Onix that made it particularly special.Its glass skin granted it resistance to Water-type attacks, which the more common Rock-type Onix would be severely hurt by, allowing it to live underwater without any issues. At the same time, however, its glass body was weak to Fire-type attacks, which typical Onix resist.

Can You Catch Crystal Onix In A Pokémon Game?
Unfortunately, Crystal Onix Isn’t In Any Pokémon Game (So Far)
Despite being located in the Orange Islands between Kanto and Johto, along with its resemblance to the manyTerastalized Pokémon found inScarlet and Violet,this unique Crystal Onix cannot be found in anyPokémongame so far. It was created as a phenomenon that was exclusive to thePokémonanime and was never made to be part of any in-game events. Considering how unique this particular Onix is, however, Game Freak should definitely consider making a reference to it at some point in the future.
The Pokémon could be given out in a special distribution or battle event in future games, for example.

Crystal Onix is an incredibly unique Pokémon that was unknowingly well ahead of its time. With both a distinct appearance and alternative typing, it has amazed fans for many years after the episode’s initial release. Although it is disappointing that it cannot be found in any of thePokémongames, it remains one of the many intriguing mysteries that are part of the expansivePokémonworld.