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Height
28'10"
Imperial
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8.8m
Metric
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28'10"/8.8m
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0.0m
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Weight
463.0lbs
Imperial
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210.0kg
Metric
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463.0lbs/210.0kg
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0.0kg
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EV yield
HP
0
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Atk
0
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Def
1
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Sp.Atk
0
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Sp.Def
0
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Speed
0
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| Base Exp.: 108
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Battle Exp.: 1081*
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Onix (Japanese: イワーク Iwark) is a dual-type Rock/Ground Pokémon.
It evolves into Steelix when traded holding a Metal Coat.
Biology
Physiology
Onix resembles a giant chain of gray boulders, with a rocky spine on its head. This Pokémon has a magnet in its brain that serves as an internal compass. Onix's body becomes more rounded and smoother as it grows with age. A fully-grown Onix measures at an enormous 28 feet 10 inches, or 8.8 meters.
Gender differences
None.
Special abilities
Onix tunnel under the ground at over fifty miles per hour, which causes tremors. If they take a hard enough blow and their body falls apart, they can regrow the rest in a matter of a few weeks. They share this trait with Arbok.
Behavior
They are very hotheaded Pokémon and will constantly attack humans and Pokémon when various objects are caught in its craggy body. However, domesticated Onix will show signs of distress instead of attacking others.
Habitat
Onix can be found in mountains and caves, though they prefer underground tunnels with little light. It can also be found in craggy mountains and abandoned mines. It is most common in Kanto, Johto, and Sinnoh, with some rare appearances in Unova.
Diet
- Main article: Pokémon food
Onix eats large boulders.
In the anime
Major appearances
Onix's first major appearance was in Showdown in Pewter City under the ownership of Brock. He used it in his journeys in Kanto and Johto before giving it to his little brother, Forrest, in A Family That Battles Together Stays Together!. At some time before Grating Spaces, it evolved into a Steelix.
Other
An Onix made its debut appearance in Pokémon - I Choose You!. It was the next Pokémon an unknown Trainer chose after the opponent's Gengar put their Nidorino to sleep.
Ash and friends encountered a giant Onix in To Master the Onixpected. It was on a rampage until Bruno managed to get a Sandslash from under the Rock Snake Pokémon's "skin." Bruno captured the Onix afterward.
The Crystal Onix featured a Crystal Onix. Ash and co. helped a glass sculptor named Mateo search for it because Mateo believed it would help inspire him to be better at his craft.
In Hello Pummelo, Drake of the Orange Crew owns an Onix and he used it to fight Ash's Squirtle in the second round in the Orange League Champion match. During the battle with Squirtle, Drake's Onix dug underground and emerged to use Bind on Squirtle, but Squirtle used Withdraw followed by a Hydro Pump, soaking Drake's Onix into submission. After drenching Drake's Onix, Squirtle defeated the Onix with a Skull Bash.
A "King Onix" was featured in Hooked on Onix. Team Rocket tricked King Onix into thinking Ash and co. were going to destroy his kingdom. When Ash managed to convince King Onix that he and his friends weren't bad by defeating it in a battle, Team Rocket tried to steal the royal Rock Snake Pokémon, but their plan was foiled, as usual.
Roark's Onix was first seen in Shapes of Things to Come where it was used against Paul's Elekid and Chimchar. In A Gruff Act to Follow, it defeated Ash's Turtwig, followed by Ash's Pikachu but Pikachu managed to defeat it in a rematch in O'er the Rampardos we Watched.
A rampaging Onix appeared in A Maze-ing Race!.
Minor appearances
Janina, Jasmine's apprentice, has an Onix in the episode Fight for the Light. Her Onix was heavily coated in wax for protection against Water attacks.
Brock used an Onix in One Team, Two Team, Red Team, Blue Team! as part of the Pokémon Triathlon.
An Onix appeared in Steeling Peace of Mind!, and again in Promoting Healthy Tangrowth!.
An Onix appeared in A Rivalry to Gible On!.
An Onix appeared in the opening scenes of Zoroark: Master of Illusions.
Pokédex entries
| This concludes the entries from the Diamond & Pearl series.
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In the manga
Onix in the Electric Tale of Pikachu
Brock has an Onix in Pokémon Zensho, the The Electric Tale of Pikachu, and Pokémon Pocket Monsters.
Pokémon Adventures
Onix debuts in Onix is On! of the Red, Green & Blue chapter as Brock's main Pokémon, however a picture of it is shown on a leaflet in Wanted: Pikachu!. Onix later continues to make appearances with Brock in various volumes onwards.
Bruno owns an Onix, on which he battles Bill, Lt. Surge and Red on Cerise Island. The Onix later manages to carry Bruno and Koga off the collapsing island. Another wild Onix was also seen on Cerise Island.
Pokédex entries
| Manga
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Chapter
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Entry
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| Pokémon Adventures
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PS067
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Digs through the earth at up to 50 miles/hour in search of food. The tunnels left behind become a favorite habitat of Diglett.
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In the TCG
- Main article: Onix (TCG)
Other appearances
Onix is obtainable in a Poké Ball. Once thrown, it flies up into the sky and uses Rock Throw on the player's opponents. This will hit everyone on the field except Kirby if he uses his down special move.
Onix is the second Poké Float to appear. It provides a horizontally flat area all the time it is on-screen, though it becomes diagonal as it leaves the screen.
Game data
Pokédex entries
| This Pokémon was unavailable prior to Generation I.
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| Generation I
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As it grows, the stone portions of its body harden to become similar to a diamond, but colored black.
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Burrows at high speed in search of food. The tunnels it leaves are used as homes by Diglett.
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Its large body is over 26 feet long. Despite its size, it can squirm its way through the ground at 50 mph.
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| Generation II
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It twists and squirms through the ground. The thunderous roar of its tunneling echoes a long way.
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It rapidly bores through the ground at 50 mph by squirming and twisting its massive, rugged body.
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As it digs through the ground, it absorbs many hard objects. This is what makes its body so solid.
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| Generation III
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Onix has a magnet in its brain. It acts as a compass so that this Pokémon does not lose direction while it is tunneling. As it grows older, its body becomes increasingly rounder and smoother.
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There is a magnet in its brain that prevents an Onix from losing direction while tunneling. As it grows older, its body becomes steadily rounder and smoother.
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It usually lives underground. It searches for food while boring its way through the ground at 50 miles per hour.
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As it grows, the stone portions of its body harden to become similar to black-colored diamonds.
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| Generation IV
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When it travels underground, it causes rumbling and tremors. It can move at 50 mph.
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It squirms through the ground using its long and rugged body. It always eats while burrowing.
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It burrows through the ground at a speed of 50 mph while feeding on large boulders.
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It twists and squirms through the ground. The thunderous roar of its tunneling echoes a long way.
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It rapidly bores through the ground at 50 mph by squirming and twisting its massive, rugged body.
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| Generation V
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It burrows through the ground at a speed of 50 mph while feeding on large boulders.
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No Pokédex data is available.
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Game locations
| This Pokémon was unavailable prior to Generation I.
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In side games
Held items
Stats
Base stats
| Stat
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Range
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| At Lv. 50
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At Lv. 100
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95 - 142
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180 - 274
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45 - 106
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85 - 207
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148 - 233
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292 - 460
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31 - 90
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58 - 174
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45 - 106
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85 - 207
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67 - 134
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130 - 262
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- Minimum stats are calculated with 0 EVs, IVs of 0, and a hindering nature.
- Maximum stats are calculated with 252 EVs, IVs of 31, and a helpful nature.
- This Pokémon's Special base stat in Generation I was 30.
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Pokéathlon stats
Type effectiveness
| Under normal battle conditions in Generation V, this Pokémon is:
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| Weak to
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Resistant against
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Unaffected by
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Damaged normally by
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Learnset
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| Game |
Move |
Type |
Cat. |
Pwr. |
Acc. |
PP
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| This Pokémon learns no moves by tutoring.
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- A black abbreviation in a colored box indicates that Onix can be tutored the move in that game
- A colored abbreviation in a white box indicates that Onix cannot be tutored the move in that game
- Bold indicates a move that gets STAB when used by Onix
- Italic indicates a move that gets STAB only when used by an evolution of Onix
- Click on the generation numbers at the top to see move tutor moves from other generations
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Side game data
Evolution
Sprites
Trivia
- In Generation I, Onix was the longest Pokémon, but in Generation II, it was dropped to second place by its evolution Steelix. When Wailord was introduced in Generation III, it became the third longest.
- Onix is the first Pokémon in the National Pokédex order that gained an evolution when it did not evolve from or into another Pokémon in its debut Generation.
- Onix is the largest and heaviest Pokémon that evolves once.
- Onix, in Generation I, is the highest-level non-legendary wild Pokémon available without the use of a glitch that the Pokédex has recorded data on its location. Onix can be found in Kanto's Victory Road at level 49.
- However, Ditto up to level 65 can be found in the Cerulean Cave, but in the Generation I games, the Pokédex does not inform the player of the Pokémon available in the cave, as Pokémon only found there would just display as "Area Unknown" in the Area section of the Pokédex.
- By being under the ownership of Bruno in Generation II, Onix is one of the few unevolved Pokémon that can evolve in the same generation as that of the Elite Four member to whom it belongs, the others being Dragonair, Shelgon, Haunter, and Sealeo. However, it's the only one where the Elite Four member doesn't own its evolved form.
- Of all the Pokémon that can evolve, Onix has the highest base Defense.
- Onix is the largest Pokémon that can legally hatch from an egg that has no pre-evolution.
- Onix is one of four Pokémon which changes its primary type upon evolution (from Rock to Steel). The others are Azurill, Swablu and Eevee.
- Onix and Swablu are also the only dual-typed Pokémon that have their primary type change during evolution.
- In addition, Onix is the only Pokémon whose evolved form has a type-advantage against its predecessor, without that type being identical to both Pokémon (such as Dragon or Ghost).
- Onix family is the only one whose all members can be acquired with in-game trades. However it's only possible in Pokémon HeartGold and SoulSilver where you can trade Bellsprout for Onix in Violet City and any Pokémon for Steelix in Olivine City.
- An item in the games called the Lagging Tail resembles the end of Onix's tail.
Origin
Onix is most likely based on a combination of a snake and earthworm. It may also been based on the wyrm, a type of dragon that has been presented as limbless and burrowing.
Name origin
Onix's name is a corruption of onyx, a mineral. Its Japanese name may be a combination of 岩 iwa, rock, and スネ−ク snake.
In other languages
| Language
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Name
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Name Origin
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| German
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Onix
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| French
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Onix
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| Korean
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롱스톤 Rongseuton
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From the English words long stone.
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| Chinese (Mandarin)
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大岩蛇 Dàyánshé
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Literally "Big boulder snake".
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| Chinese (Cantonese)
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大岩蛇 Daaihngàahmsèh
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Same as Mandarin name.
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Related articles
External links
Notes
Hard Stone (5%)
For other sprites and images, please see Onix images on Bulbagarden Archives.
