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Brock's Steelix

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Brock's Steelix
タケシのハガネール Takeshi's Haganeil
Poké Ball
Brock Steelix.png
Brock's Steelix
Debuts in Showdown in Pewter City
Caught at Pewter City
Evolves in Prior to Grating Spaces!
Gender Male*
Ability Unknown
Current location Pewter Gym
Onix Steelix
This Pokémon spent at least 403 episodes as Onix.
Voice actor Japanese English
As Onix Unshō Ishizuka
As Steelix Unshō Ishizuka

Brock's Steelix (Japanese: タケシのハガネール Takeshi's Haganeil) was the first Pokémon acquired by Brock in the anime, and is his main battling Pokémon in both the anime and games.

In the anime

History

Original series

Kanto
Brock receiving Onix on his 10th birthday in the anime

Brock received Steelix as an Onix from his father, Flint, on his tenth birthday, as seen in a flashback in Having a Wailord of a Time. Onix was Brock's first Pokémon and has consistently been his strongest.

As an Onix

Onix was first seen during Brock's match with Ash at the Pewter Gym where it was used against Pikachu. Onix wasn't fazed by Pikachu's Thunder Shocks because of its secondary Ground type, and was easily able to subdue Pikachu with a Bind. Ash decided to forfeit the match because he couldn't stand to see Pikachu in pain. Onix was also used in Brock's rematch with Ash where it battled Pikachu once again. This time Pikachu's newly learned Thunderbolt attack was actually able to cause damage to Onix, though it was still not enough to defeat it. Onix once again had Pikachu in a Bind until Brock told it to stop because Brock didn't want to hurt Pikachu. Eventually Pikachu's Thunderbolt set off the sprinklers, severely damaging Onix because of its severe weakness to water. Pikachu took Onix down with one final Thunderbolt, but Ash chose to forfeit. Brock decided to give Ash the Boulder Badge anyway, and then joined him on his journey, bringing Onix with him.

Forming a staircase to help Ash and Brock escape

Like most of Brock's Pokémon, Onix received very little screentime in comparison to the Pokémon of the other main characters. This may have been due to its massive size, although this came in handy when the trio were trapped in the upside down, sunken St. Anne in Pokémon Shipwreck. Onix was used as a bridge and ladder to allow the group to reach lower levels of the ship.

Onix and Brock in the race

Onix was sent out in an attempt to prevent Team Rocket escaping with a Moon Stone in Clefairy and the Moon Stone. It tunneled through ground and burst up to disrupt the escaping Team Rocket, and although it fought to a stalemate with Koffing, it held them up long enough for Ash and the others to arrive and save the day.

Onix was used as Brock's steed in The Flame Pokémon-athon!, during the big race. It managed to maintain second behind Dario and just ahead of a farmhand on a Rhyhorn. However, the race involved crossing a body of water, which the two Rock-type Pokémon were unable to cross, and Onix had to withdraw. Onix was noticeably upset by this, the only time it has been shown to weep.

In Who Gets To Keep Togepi?, Brock used Onix in the four-way tournament, where it went up against Meowth. It seemed to outclass the tiny Normal-type Pokémon with Rock Throw, but Meowth was extremely determined after seeing Togepi, and managed to defeat Onix by splashing it with a watering can and then using Fury Swipes.

In Volcanic Panic, it helped stop the erupting volcano by helping Geodude, Blaine's Magmar, and Ash's Charizard and Pikachu clog the lava flow with boulders. Misty's Staryu and Ash's Squirtle bathed Onix in water to help keep it from overheating.

Brock used it in To Master the Onixpected! in an attempt to restrain a giant Onix, and in The Ancient Puzzle of Pokémopolis, in an attempt to restrain a giant Gengar. It was absorbed into the ancient Pokémon just like Team Rocket, the scientists and Pidgeotto but reappeared at the end of the episode.

Orange Islands

In Poké Ball Peril, Brock decided to remain at Professor Ivy's lab in the Orange Islands, and kept Onix with him. However, when Brock returned to the group in A Tent Situation, he brought Onix with him, as revealed in Roll On, Pokémon!, where it lost a battle with a powerful Donphan.

Johto
Onix swatting Ash and Misty aside trying to dodge Totodile

In Sick Daze, it was revealed that Brock usually polished his Geodude and Onix as part of his Breeder duties. The dubious task of polishing Brock's Onix fell to Ash, who attempted to shorten his chore through use of his Totodile's Water Gun, which caused Onix to panic and earned Ash a reprimand from Misty. It was captured by Team Rocket, but was rescued by the arrival of Brock, Golbat and Pineco. It then used Rock Throw to send Team Rocket blasting off.

In Control Freak!, Jessie, in possession of an ancient Queen's mask and scepter, took control of Onix, along with Geodude and Pikachu. Team Rocket then beat a hasty retreat by ordering Onix to carry them out of the underground chambers. When Team Rocket fled, Onix was freed from the influence of the scepter. In Entei At Your Own Risk, Onix comically buried Psyduck in hot sand as it collapsed in the bed to relax. It later used its large, dense body to shield the group from Team Rocket's suction.

It had an impressive battle against Iron-Masked Marauder's Tyranitar in Celebi: Voice of the Forest, where it was battered but finally managed to defeat Tyranitar when Suicune intervened.

In the Christmas special, Onix was seen having a snowball fight with the rest of the Pokémon. It was later seen being used as a sled.

Advanced Generation series

Hoenn

Brock ended up lending Onix and two of his other Pokémon to his eldest sibling, Forrest, who took on the role of Gym Leader at Pewter City while Brock went to Hoenn.

Kanto Battle Frontier

When Brock returned to the Gym in Grating Spaces, Onix had evolved into a Steelix under Forrest's care. Steelix was shown to have learned Iron Tail and a powerful Dragon Breath attack during its time at the Gym. It was used in a Double Battle with Ash and his Donphan against Jessie, James and their newly obtained Charizard and Aggron. The battle started out rough with Steelix being hit by Charizard's powerful Flamethrower. Donphan saved Steelix by attacking Charizard but was pushed back by Aggron's Mega Punch and Hyper Beam. Donphan continued to attack Charizard but was hit hard with Aggron's Water Pulse. Steelix then countered another Flamethrower with an Iron Tail and launched Donphan into the air over Aggron's Water Pulse. Donphan used the momentum to land a devastating Take Down attack on Aggron. The battle was stopped after Forrest discovered it was Team Rocket they were battling.

Diamond & Pearl series

Steelix made an appearance in SS025, in which it was called out by Forrest to have a Gym battle against Nurse Joy. However, at the time Nurse Joy refused to battle anyone but Brock or Flint.

Personality and characteristics

Brock and his Steelix

Like all of Brock's Pokémon, Onix received very little personality development while it was on-screen, which was not often, most likely due to its size. However, it is very loyal to Brock as his starter Pokémon and reflects his personality quite closely. Like Brock, Onix was very intimidating and serious in its debut appearance, mercilessly crushing Pikachu in obedience to its commands. Like Brock, its tough exterior hides a sensitive interior. Just as Brock gets emotional over women, Onix has been shown to be morbidly afraid of water. In the big race in The Flame Pokémon-athon!, Onix kept up a top three position until they hit a body of water and were forced to retire, causing it to cry in disappointment. When necessity forced it to expose itself to water when damming the Cinnabar volcano, it only permitted the tip of its tail to be soaked.

As a Steelix, its personality remains much the same. It was very happy to see Brock again and battled loyally alongside him.

Moves used

Brock Onix Dig.png
Using Dig
as an Onix
Brock Steelix Iron Tail.png
Using Iron Tail
Move First Used In
Tackle Showdown in Pewter City
Bind  Showdown in Pewter City
Dig Clefairy and the Moon Stone
Rock Throw Who Gets to Keep Togepi?
Sandstorm Entei at Your Own Risk
Slam A Family That Battles Together Stays Together!
Iron Tail  Grating Spaces!
Dragon Breath  Grating Spaces!
A shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.

In Pokémon Origins

Brock's Onix in Pokémon Origins

Onix was the second Pokémon Brock used during his Gym battle against Red in the Pokémon Origins episode File 1 - Red. At first, it took massive and almost fatal damage from Red's Nidoran♂'s Double Kick, but was then able to defeat it with Bide. It then proceeded in defeating also Red's Spearow, Rattata, and Metapod in a quick succession, although the last managed to land a String Shot on it before being defeated. Red was left with only Charmander, and as it had also been significantly weakened while battling Brock's Geodude, both Trainers knew that the first one to land a hit on the opponent would win. Thanks to Onix's speed having been reduced by Metapod's String Shot, Charmander was able to outspeed the Rock Snake Pokémon and strike it with Scratch, defeating it and giving Red the victory.

Moves used

Brock Onix Tackle PO.png
Using Tackle
Move First Used In
Bide File 1 - Red
Tackle File 1 - Red
A shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.

In the games

Steelix, in either of its forms, has appeared in every game that Brock has appeared in, and is Brock's main Pokémon in each of those games.

Pokémon Red, Blue, and Green Pokémon Yellow Pokémon Gold, Silver, and Crystal Pokémon FireRed and LeafGreen
Spr 1b 095.png
Types:
Rock Ground
Onix Lv.14
Tackle
Normal
Screech
Normal
Bide
Normal
Bind
Normal
Spr 1y 095.png
Types:
Rock Ground
Onix Lv.12
Tackle
Normal
Screech
Normal
Bide
Normal
Bind
Normal
Spr 2c 095.gif
Types:
Rock Ground
Held item:
None
Onix Lv.44
Bind
Normal
Rock Slide
Rock
Bide
Normal
Sandstorm
Rock
Spr 3f 095.png
Types:
Rock Ground
Ability:
Rock Head
Held item:
None
Onix Lv.14
Tackle
Normal
Bind
Normal
Harden
Normal
Rock Tomb
Rock
Pokémon HeartGold and SoulSilver Pokémon Black 2 and White 2
Pokémon World Tournament
Gym battle Fighting Dojo rematch Kanto Leaders Tournament Type Expert/World Leaders Tournament
Spr 4h 095.png
Types:
Rock Ground
Ability:
Sturdy
Held item:
Bag Sitrus Berry Sprite.png Sitrus Berry
Onix Lv.54
Rock Slide
Rock Physical
Iron Tail
Steel Physical
Sandstorm
Rock Status
Screech
Normal Status
Spr 4h 095.png
Types:
Rock Ground
Ability:
Sturdy
Held item:
Bag Sitrus Berry Sprite.png Sitrus Berry
Onix Lv.61
Stealth Rock
Rock Status
Rock Slide
Rock Physical
Rock Polish
Rock Status
Sandstorm
Rock Status
Spr 5b 095.png
Types:
  Rock     Ground  
Ability:
Rock Head or Sturdy
Held item:
Bag Salac Berry Sprite.png Salac Berry
Onix/ Lv.50
Sand Tomb
Ground Physical
Protect
Normal Status
Stealth Rock
Rock Status
Sandstorm
Rock Status
Spr 5b 095.png
Types:
  Rock     Ground  
Ability:
Rock Head or Sturdy
Held item:
Bag Eviolite Sprite.png Eviolite
Onix/ Lv.50
Stone Edge
Rock Physical
Earthquake
Ground Physical
Iron Head
Steel Physical
Sandstorm
Rock Status
Pokémon Stadium Pokémon Stadium 2
Round 1 Round 2 Round 1 Round 2
095.png
Types:
Rock Ground
Onix Lv.50-100
Bind
Normal
Toxic
Poison
Earthquake
Ground
Rock Slide
Rock
095.png
Types:
Rock Ground
Onix Lv.50-100
Bind
Normal
Rock Slide
Rock
Earthquake
Ground
Screech
Normal
095.png
Types:
Rock Ground
Held item:
Quick Claw
Onix Lv.50-100
Bide
Normal
Strength
Normal
Rock Throw
Rock
Earthquake
Ground
208.png
Types:
Steel Ground
Held item:
Scope Lens
Steelix Lv.50-100
Fissure
Ground
Return
Normal
Earthquake
Ground
Rock Slide
Rock

In the manga

Onix in the Ash and Pikachu manga

In the Ash and Pikachu manga

Brock's Steelix debuted as an Onix in After the Missing Rucksack!! of the Ash and Pikachu manga.

In the movie adaptations

Steelix appeared as an Onix in Emperor of the Crystal Tower: Entei and Celebi: a Timeless Encounter.

Moves used

Move First Used In
Tackle Celebi: a Timeless Encounter
A shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.

In the Pokémon Adventures manga

Onix in Pokémon Adventures

Red challenges Brock's Onix during Onix is On! in a Gym battle to gain the Boulder Badge. Red uses Pika to battle (his other two party Pokémon too tired from repeated use), but it is still angry with Red for capturing it, and ignored his commands. Onix first uses Rock Throw at Pika, which caused it to become even more annoyed, and it started shocking Red instead. Brock is infuriated that the one challenger he'd hoped to go all-out on seemed to have won his way through "dumb luck." He then revealed Onix's strongest move: using its body like a torpedo to gain momentum and hit Pika with Skull Bash. Red narrowly pushes Pika out of the way, and having decided to fight for him, the Pikachu uses a powerful electric attack on Onix, breaking apart the rocks that its body is composed of. In the end, Red seemed to have gotten Pika's trust, before using the handshake he offered to electrocute him in the outskirts of Pewter City.

Brock returns near the end of the Red, Green, & Blue chapter when Onix's Tackle helps corner the Team Rocket Grunts who tried to flee from the Silph Co. building.

Brock would later use Onix to serve as a replacement bridge in the Tohjo Falls and in an exhibition match against Jasmine, where it was soundly defeated by her Steelix's higher defense.

Moves used

Brock Onix Bind Adventures.png
Using Bind
Move First Used In
Rock Throw Onix is On!
Skull Bash Onix is On!
Tackle The Winged Legends
Bind Heads On Kabutops!
A shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.

In The Electric Tale of Pikachu manga

Onix in The Electric Tale of Pikachu

Since The Electric Tale of Pikachu is based on the anime, Onix appears in this manga in Ash and Brock's Gym battle in Play Misty For Me. It loses the battle. It later fought a losing battle with the Black Fog.

In the Pocket Monsters HGSS Jou's Big Adventure manga

Brock's Onix only appeared as a silhouette in Pocket Monsters HGSS Jou's Big Adventure along with its Trainer.

In the Pokémon Pocket Monsters manga

Onix in Pokémon Pocket Monsters

Brock's Onix appears in Bring Down the Powerful Opponent Onix!!, in Red's battle with Brock. After witnessing Green and his Charmander being tossed out of the Gym, Clefairy was initially too afraid to face Onix in battle and had attempted to flee, but later gained courage to fight after learning that his cousin Pikachu was part of Brock's collection, which infuriated Clefairy. During the battle, Clefairy tried to use an assortment of tricks to win the battle, which only prolonged the fight. Eventually Clefairy leads Onix around a ceiling column, trapping Onix as it becomes entangled around it. Onix manages to free itself and attempts to crush Clefairy by wrapping its tail around him, but stops after Clefairy cunningly draws his picture onto Onix's tail, which confuses Onix and causes it to chase after its own tail. This makes Onix dizzy, and Clefairy knocks it out by smashing the fallen pillar onto its head, thus winning the battle.

In the Pokémon Zensho manga

Onix in Pokémon Zensho

Satoshi battled Brock's Onix in Pewter City. Satoshi used his Charmander in the battle, and told it to chop the horn-like part of Onix's head off. Onix was then defeated, and Satoshi won the battle.

Moves used

Brock Onix Tackle Zensho.png
Using Tackle
Move First Used In
Tackle Pewter City
A shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.


In the TCG

This listing is of cards mentioning or featuring Brock's Onix in the Pokémon Trading Card Game.

Related cards
Cards listed with a silver background are legal to use in the current Standard format.
Card Type English
Expansion
Rarity # Japanese
Expansion
Rarity #
Brock's Onix Fighting Gym Heroes Rare 21/132 Nivi City Gym    
Brock's Onix Fighting Gym Heroes Common 69/132 Leaders' Stadium Common  
 

Trivia

  • Steelix is the first Pokémon belonging to one of Ash's friends to evolve off-screen.

Related articles

For more information on this Pokémon's species, see Onix and Steelix.


Project Anime logo.png This article is part of Project Anime, a Bulbapedia project that covers all aspects of the Pokémon anime.