The world of Pokemon is filled with diverse creatures, each with unique abilities and characteristics. Among these, the rock snake Pokemon stand out as some of the most formidable and imposing.

There are, unfortunately, only two rock snake Pokemon, the stalwart Onix, and the powerful Steelix. These creatures are known for their rock-based abilities and impressive defense stats.

But beyond their abilities in battle, the rock snake Pokemon also have fascinating origins and lore. Onix, for example, is said to be a combination of rock and serpent and can tunnel through the earth at high speeds.

Steelix, on the other hand, is the evolved form of Onix and is said to be formed when Onix burrows deep into the earth and is exposed to intense pressure and heat.

This comprehensive article will take a closer look at all the rock snake Pokemon available. We will explore their abilities, strengths, and weaknesses in battle and delve into their origins and lore.

Whether you’re a seasoned Pokemon trainer or new to the world of Pokemon, this article will surely provide valuable insights and information about these mighty creatures that are rock snake pokemon!

What makes rock snake Pokemon unique

Rock Snake Pokemon, such as Onix and Steelix, are fascinating creatures that are based on a combination of a snake and earthworm, and possibly also the wyrm, a limbless dragon that burrows underground.

They have unique abilities and characteristics, such as the ability to dig underground and Mega Steelix’s crystalline body, which refers to graphite turning into diamonds under high pressure and heat.

They have also made many appearances in the Pokemon franchise, making them well-known and beloved by many fans.

They are powerful Pokemon that are also known for their hardness and durability, making them formidable opponents in battles.



Onix, known as Iwark in Japan, is a rock and ground type Pokémon introduced in the first generation.

This snake pokemon evolves into Steelix, but it needs to be exposed to a Metal Coat during trading or in the game “Pokémon Legends: Arceus.”

Onix is a Pokémon made of a giant chain of gray boulders that become tinyer towards the end. Its size makes it the tallest Rock-type Pokémon.

It has a rounded snout and black eyes. He has a a rocky spine on top of its head. As it gets older, it becomes more smoother and rounded, eventually becoming similar to black diamonds.

Inside its brain is a strong magnet that acts as an internal compass, guiding Onix wherever they need to go and stops them from getting lost while digging.

Onix makes tunnels under the ground at over 50 miles (80 kilometers) per hour, which causes tremors and a terrifying roar that echoes a long way.

The winding, massive tunnels it leaves behind are used as homes by Diglett. Hard objects he encountered while tunneling is absorbed into its body, making it extremely sturdy. This also allows it to consume boulders as food.

As we have seen in the Pokémon Stadium series, Onix can rotate its head, or any part of its body, in 360 degrees.

It is a very aggressive Pokémon and will constantly attack other Pokemon and humans, as seen in the anime.

Onix can be separated from its body parts in battle, as seen in the Pokémon Adventures manga, and still be fine ok on, either reattaching or regenerating to its body segments.

It is told that an Onix which lives for around 100 years will evolve into a Steelix after its composition becomes more diamond-like. You can find Onix in the mountains and caves.

In terms of its evolution, this rock snake pokemon evolves into Steelix when exposed to a Metal Coat during trading or in the game “Pokémon Legends: Arceus.”

This process changes its composition and makes it more diamond-like, leading to the evolution into Steelix.

Onix Origin

The origin of Onix’s design is thought to be a play on a rock python or an earthworm. Its enormous size is believed to have been inspired by the Mongolian death worm, a creature similar to an earthworm but much longer, reaching up to 7 feet.

The Onix’s lifestyle of living underground and consuming large amounts of soil while tunneling is more similar to that of an earthworm than that of a snake.

Earthworms consume soil and digest organic material such as plant matter, living protozoa, rotifers, nematodes, bacteria, fungi, and other microorganisms.

Major appearances

Brock’s Onix, which he used in his travels in Kanto and Johto before giving it away to his brother, Forrest, so that he could train it in A Family That Battles Together Stays Together!. Before Grating Spaces!, at some point, it evolved into a Steelix.

Bruno’s Onix was on a rampage before Bruno was able to pull a Sandslash out from two of its boulders. Bruno captured the Onix afterward.

Crystal Onix is a special Onix type, which body is created out of glass crystal. Ash and his friends choosed to help a glass sculptor named Mateo search for it because he believed it would help inspire him to improve his craft.



Steelix, known as Haganeil in Japan, is a steel and ground type Pokémon introduced in the second generation.

This rock snake pokemon evolves from Onix when exposed to a Metal Coat during trading or in the game “Pokemon Legends: Arceus.”

Additionally, Steelix can Mega evolve into Mega Steelix by using the Steelixite.

Steelix is a long, snake Pokémon with a silvery-gray body built up of rock-like sections, that can possess chips and scrapes from fights and making tunnels.

Three of those parts have long rock spikes coming out of them on either side. Its head is mainly made up of its big, wide jaw with parts of large square teeth in it.

Along its bottom jaw are ridges: there are two pairs of spines on a male Steelix, while only one pair on a female. Its eye sockets are a bit deep-set, and the eyes are red.

Steelix head has two long ridges that go from the eyes up to the top of its head. The end of its tail is conical with a blunt end.

As Mega Steelix, its body becomes longer, with almost double its mass, and has more features. Its lower jaw becomes heavier, armored with a round, curved shape, and its eyes turn blue.

Additionally, another pair of ridges appear on its bottom jaw, and two sharp, flat structures consisting of three connected projections on either side.

The gray, rock-like spikes and its tail end have changed into prism-like crystalline spikes; the parts from which the spikes protrude are a lot larger as well.

The cells inside its body, crystallized by the energy made from Mega Evolution, are harder than any mineral and able to survive any temperature.

This snake pokemon moves really slowly, but its strengthened body is also impervious to damage and lashes out at foes without flinching.

Steelix can burrow up to six-tenths of a mile underground, even further down than its pre-evolved form Onix, and it can be located in mountains or caves.

Steelix can dig even toward the world’s core. Its powerful jaws quickly chew through boulders, and its eyes can see in the dark.

Exposure to underground heat and pressures alongside its iron-rich soil diet has made its body harder than diamonds.

Steelix’s evolution is said to have resulted from Onix’s composition becoming more diamond-like after living for about 100 years.

A special Steelix is worshiped in Lental for being one of the seven guardians Illumina Pokémon. It resides in the Durice Island Illumina Spot.

It is considered a sacred and powerful creature, praised for its strength and durability. It symbolizes protection and stability, and people believe it brings prosperity and good luck.

Major appearances

Brock’s Steelix, which evolved from his Onix before Grating Spaces, was revealed to be able to Mega Evolve into Mega Steelix in the episode “When Regions Collide!”.

Jasmine’s Steelix debuted in the episode “Nerves of Steelix!” and was used to help Ash stop Team Rocket from stealing Pikachu. During the Gym battle, Ash’s Cyndaquil defeated it, winning Ash the Mineral Badge.

Steelix Origin

Steelix, like its pre-evolved form Onix, is likely based on a combination of a snake and earthworm. Its long, serpentine body and the ability to burrow underground are reminiscent of these animals.

Additionally, the wyrm, a type of dragon often depicted as limbless and burrowing, may also have inspired its design.

The golden coloration of its Shiny form may reference the rarity of gold as a metal.

Mega Steelix’s crystalline body may reference the process of graphite turning into diamonds under high pressure and heat.

This transformation is known as metamorphism and is a process that occurs deep within the earth’s crust. The appearance of Mega Steelix’s crystalline body is an exciting representation of this geological process.

The addition of metallic-looking scraps constantly rotating around its neck and the black spot with a blue hexagon on each side gives it a futuristic and advanced appearance, making the design unique and exciting.

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