Brock's Steelix

Brock's Steelix (Japanese: タケシのハガネール Takeshi's Haganeil) was the first acquired by in , and is his main battling Pokémon in both Pokémon animation and the . It was given to Brock by his father, .
==In animation==
===History===
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=====Kanto=====
 received Steelix as an from his father, , 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.
Onix was first seen in Showdown in Pewter City during Brock's Gym with at the Pewter Gym, where it was used against . Onix wasn't fazed by Pikachu's s because of its secondary type, and was easily able to subdue Pikachu with a . Ash forfeited 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 again. This time Pikachu's newly learned attack was 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 weakness to water. Pikachu took Onix down with one final Thunderbolt, but Ash chose to forfeit. Brock decided to give Ash the anyway, joining him on his journey and bringing Onix with him.
Like most of , Onix received very little screen time compared to the Pokémon of the other main characters. This may have been due to its massive size.
Onix was sent out in an attempt to prevent from escaping with a Moon Stone in Clefairy and the Moon Stone. It through the ground and burst up to disrupt the escaping Team Rocket, and although it fought to a stalemate with , it held them up long enough for Ash and the others to arrive and save the day. In Pokémon Shipwreck, when the trio was trapped in the upside-down sunken St. Anne, Onix was used as a bridge and ladder to allow the group to reach the lower levels of the ship.
Onix was used as Brock's steed in The Flame Pokémon-athon! during the Big P Pokémon Race. It managed to maintain second behind Dario and just ahead of a farmhand on a . However, the race involved crossing a body of water, which the two Pokémon could not cross, and Onix had to withdraw. Onix was noticeably upset by this and even wept.
In Who Gets To Keep Togepi?, Brock used Onix in the four-way tournament, where it went up against . It seemed to outclass the tiny Pokémon with . Still, Meowth was extremely determined after seeing and managed to defeat Onix by splashing it with two buckets of water and then using . Brock accused Meowth of cheating, though he defended his rights to be a protective parent unhindered.
In Volcanic Panic, it helped stop the erupting volcano by helping , Blaine's Magmar, Ash's Charizard, and Ash's 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 , and in The Ancient Puzzle of Pokémopolis, in an attempt to restrain a giant . It was absorbed into the ancient Pokémon just like Team Rocket, the scientists, and , but reappeared at the end of the episode.
In Fire and Ice, Brock called out Onix to rescue Ash's Pokémon from Team Rocket, who tried to steal them under the ploy of healing them at a fake Pokémon Center. It quickly caught their balloon in its jaws and, after the group had retrieved Ash's Pokémon, sent them blasting off by bursting it.
=====Orange Islands=====
In Poké Ball Peril, when Brock decided to stay with Professor Ivy while Ash and explored the Orange Islands, Onix remained with him. It was seen, along with , , and , bidding goodbye to Ash and Misty as they parted ways with Brock. However, it returned with him to Pallet Town when he decided to leave Ivy.
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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 .
In Spell of the Unown: Entei, Onix was called up against Molly Hale. It battled and was defeated by .
In Mewtwo Returns, Onix was sent out alongside Brock and Misty's Pokémon to stop and the rest of Team Rocket from recapturing . Their distraction gave Ash the time he needed to take Mewtwo to the top of Mount Quena so it could be healed. 
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 the use of his 's , which caused Onix to panic and earned Ash a reprimand from . It was captured by Team Rocket, but was rescued by the arrival of Brock, , and and used Rock Throw to send Team Rocket blasting off.
In Control Freak!, Jessie, possessing an ancient Queen's mask and scepter, took control of Onix, Geodude, and Pikachu. Team Rocket ordered a hasty retreat by ordering Onix to carry them out of the underground chambers. When Team Rocket fled, Onix was freed from the scepter's influence. In Entei at Your Own Risk, Onix comically buried 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 Twisty Turbo Tempest machine suction.
In Right On, Rhydon!, Brock used Onix in an attempt to impress Pietra, whose Pokémon were struggling to create a tunnel. It smashed its head against the hardened rock several times, but it quickly fled after some water hit its back.
Onix acted as a firefighter once again in Great Bowls of Fire!, where it attempted to rescue the Pokémon trapped by a raging fire in the Dragon Holy Land.
====Pokémon Chronicles====
In A Family That Battles Together Stays Together!, Onix was used in a battle against Brock's mother Lola and her to decide if the Pewter City Gym would become a Gym. Despite being at a type disadvantage, Onix defeated Mantine, allowing the Pewter Gym to remain as a Rock-type Gym. Afterward, Brock ended up lending Onix, Geodude, and Crobat to his eldest sibling, Forrest, who took on the role of Gym Leader at Pewter City while Brock went to Hoenn.
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When Brock returned to the Gym in Grating Spaces, Onix had evolved into a Steelix under Forrest's care. Steelix was revealed to have learned and a powerful attack during its time at the Gym. It was used in a Tag Battle with Ash and his against disguised Jessie and James, and their newly obtained and . The battle was eventually stopped after Team Rocket was exposed.
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In DPS02, Steelix was called out by Forrest to have a Gym battle against Nurse Joy. However, Nurse Joy refused to battle anyone but Brock or Flint at the time.
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In When Regions Collide!, Steelix battled Kiawe's Turtonator. A while into the battle, figured that Steelix was too strong and decided to use a Z-Move to finish the match. In response, Brock surprised everyone by revealing a Key Stone and Mega Evolving his Steelix into Mega Steelix. Turtonator successfully launched an at Steelix, but despite dealing heavy damage, it wasn't able to deal a decisive blow, much to Kiawe's shock. Steelix defeated Turtonator with a .
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Steelix reappeared in The Arceus Chronicles (Part 3), where it teamed up with and to fight against the Team Galactic s. It fought against Jupiter's , striking it with a powerful Stone Edge before being pushed back by . eventually showed up, allowing Brock and Steelix to leave and help stop the rampaging .
In Must Be Our Heroes and the Witch!, Brock, hypnotized by a , sent Steelix out to battle Ash, Misty, and .
In Ash and Latios, Steelix was used to fight against a , who was trying to capture and . Although Steelix was briefly turned to stone by the hunter's device, it was restored when Pikachu destroyed the machine.
===Personality and characteristics===
Like many of , Steelix received very little personality development while onscreen, which was not often, most likely due to its size. However, it is very loyal to Brock as his first Pokémon and reflects his personality closely. Like Brock, Steelix was very intimidating and serious in its debut, mercilessly crushing in obedience to its commands. It also has a tough exterior that hides a sensitive interior. Just as Brock gets emotional over women, Steelix is morbidly afraid of water. During the Big P Pokémon 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 , 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 after its evolution and has continued battling loyally alongside him.
===Appearance===
:See also: Mega Evolution
As an Onix	As a Mega Steelix
 	
===Moves used===
====Moves improvised====
	 	 	
	When Regions Collide! 	 	None
	Description: Counter Shield was used in When Regions Collide!. Steelix uses Gyro Ball while spinning to deflect the opponent's attacks.	Description: Counter Shield was used in When Regions Collide!. Steelix uses Gyro Ball while spinning to deflect the opponent's attacks.	Description: Counter Shield was used in When Regions Collide!. Steelix uses Gyro Ball while spinning to deflect the opponent's attacks.
===Pokémon Origins===
Onix was the second Pokémon that Brock used during his Gym battle against in File 1: Red. At first, it took supereffective damage from a made by Red's , but was able to defeat him with . It proceeded to defeat Red's , , and in quick succession, although the latter managed to land a on it before being defeated. Red was left with only , 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 and strike it with , defeating it and giving Red the victory.
====Moves used====
===Pokémon Masters Animated Trailer===
===GOTCHA!===
Brock's Onix briefly appeared in GOTCHA!.
==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.
===In the core series===
 	 	 	
 	 	 	
 	 	Pokémon World Tournament	Pokémon World Tournament
Gym battle 	Fighting Dojo rematch 	Kanto Leaders Tournament	Type Expert/World Leaders Tournament
 	 	 	
Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!	Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!	 	
Gym battle 	Rematch 	 	
 	 	 	
===Pokémon Stadium series===
Pokémon Stadium	Pokémon Stadium	Pokémon Stadium 2	Pokémon Stadium 2
Round 1 	Round 2 	Round 1 	Round 2
 	 	 	
===In spin-off games===
====Pokémon: Catch the Numbers!====
Onix appears in Pokémon: Catch the Numbers! as one of the Pokémon the player needs to get back from .
====Pokémon Masters EX====
 forms a sync pair with Onix in Pokémon Masters EX.
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==In the manga==
===Ash & Pikachu===
Brock's Onix appeared in Ash & Pikachu.
===Movie adaptations===
Brock's Onix appeared in and , fulfilling the same role as it did in the s.
====Moves used====
===Pokémon Adventures===
====History====
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Brock's Onix debuted in Onix is On!, where it took on during his battle to earn the . As Red's other Pokémon were completely exhausted from the numerous Gym Trainer battles required to reach Brock, Red was forced to use his Pikachu, which he had only recently caught and was having difficulty connecting with. This led to Pikachu making its own decisions during the battle, even at one point ignoring Onix and attacking Red instead. However, when Onix tried to attack Pikachu with , the Electric Mouse was able to shock Onix into pieces, making Red the winner. 
In The Winged Legends, Onix was used to stop a group of s trying to flee from Saffron City.
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In Chinchou in Charge, Onix was used as a replacement bridge for Brock, Misty, and Erika at the Tohjo Falls, as the original bridge over the falls was broken. Onix collapsed when the trio was attacked by a large group of , , and .
In Capital Kabutops, Onix was used in an against Jasmine and her . Steelix was wearing a layer of rock over its steel body to disguise itself, causing everyone to believe it was an Onix. As the two constricted each other, Onix took damage due to 's much harder body, and the Iron Snake's outer coating began to chip and fall off. Exposed as being a fraud, Steelix broke out of its disguise and revealed its true identity. Onix was quickly taken down by Steelix's .
====Moves used====
===The Electric Tale of Pikachu===
Brock's Onix briefly appeared in Play Misty For Me, taking part in the Gym battle between and Brock, eventually getting defeated. It reappeared in Haunting My Dreams, where it was used to battle the known as the Black Fog. However, like almost every other Pokémon participating in the battle, it ended up being defeated.
===Pocket Monsters HGSS Jō's Big Adventure===
Brock's Onix only appeared as a silhouette in JBA5 along with its Trainer.
===Pokémon Pocket Monsters===
Brock's Onix appeared in Bring Down the Powerful Opponent Onix!!, during 's battle with Brock. After witnessing and his being tossed out of the Gym, was initially too afraid to face Onix in battle and attempted to flee, but later gained courage to fight after learning that his cousin 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 led Onix around a ceiling column, trapping Onix as it became entangled around it. Onix managed to free itself and attempted to crush Clefairy by wrapping its tail around him, but stopped after Clefairy cunningly drew his picture onto Onix's tail, which confused Onix and caused it to chase after its tail. This made Onix dizzy, and Clefairy subsequently knocked it out by smashing the fallen pillar onto its head, thus winning the battle.
===Pokémon Zensho===
In PZ02, battled Brock's Onix with his . Although initially having trouble against the huge Rock-type, Charmander eventually won the battle by chopping off the horn on Onix's head, defeating it. 
====Moves used====
==In the TCG==
This listing is of cards mentioning or featuring Brock's Onix in the Pokémon Trading Card Game.
* Onix also appears in the cards Brock's Training Method (Gym Heroes 106) and Brock's Training (Hidden Fates 55).
===Artwork===
 	
Artwork from the	feeds Onix
===Merchandise===
====Nivi City Gym Deck====
Two decks featuring Gym Leaders and Pokémon belonging them were released on April 26, 1998, building up to the eventual release of later in the year. The (Japanese: ニビシティジム タケシ) Deck focuses on Gym Leader Brock and his Pokémon, the majority of which are s. The deck comprises 60 cards, plus four additional cards to be integrated into it, as well as a coin, rulebook, and Pokémon Gym Guide.
Product images:
====Brock of Pewter City Gym Trainer Battle Deck====
Available from January 25, 2019 and further promoting Pokémon: Let's Go, Pikachu! and Let's Go, Eevee! were a pair of Standard Decks focusing on the first two Kanto Gym Leaders players encounter on their adventure. One of these was the Brock of Pewter City Gym Trainer Battle Deck (Japanese: トレーナーバトルデッキ：ニビシティジムのタケシ Trainer Battle Deck: Takeshi of Nibi City Gym), which focuses on specialist Brock. The deck includes an assortment of TCG equivalent Pokémon, including Brock's primary Pokémon as a , as well as supporting s. Each deck includes a set of damage counters and status markers, a GX marker, a , a deck box, a playmat, and a set of card sleeves.
Product images:
====Brock VS Misty Full-size Rubber Playmat====
Pokémon Centers began selling the Brock VS Misty Full-size Rubber Playmat (Japanese: ラバープレイマット フルサイズ タケシVSカスミ Rubber Playmat: Full-size: Takeshi VS Kasumi) alongside the Trainer Battle Decks on January 25, 2019. This 2-player playmat features artwork of Brock and his in one play area and Misty and her in the opposite play area. Both Gym Leaders feature their updated appearances from Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!.
Product image:
==Trivia==
* Steelix is the first Pokémon belonging to:
** A main character to not have an evolutionary line at the time of its debut.
** One of Ash's friends to evolve off-screen.
** A main character to change one of its types upon evolution.
** A main character to use a .
** A main character to Mega Evolve in .
** One of Ash's friends to use a - or move.
* Steelix has used the most moves out of all of Brock's Pokémon, with eleven total.
* Steelix is the tallest Pokémon currently owned by a main character.
* In the ending theme Let's Join Hands, Steelix erroneously appears as Onix. This also occurs with appearing as an Happiny.
==Related articles==
Steelix
Steelix, Brock's
Category:Pokémon belonging to Ash and friends' family
Category:Red, Blue and Yellow characters
Category:Gold, Silver and Crystal characters
Category:FireRed and LeafGreen characters
Category:HeartGold and SoulSilver characters
Category:Black 2 and White 2 characters
Category:Let's Go, Pikachu! and Let's Go, Eevee! characters
Category:Stadium characters
Category:Stadium 2 characters
Category:Pokémon with game move errors
Category:Pokémon Adventures characters (Pokémon)
Category:Electric Tale of Pikachu characters
Category:Ash & Pikachu characters
Category:Pokémon Zensho characters
Category:Pokémon Origins characters
de:Rockos Stahlos
es:Steelix de Brock
fr:Steelix de Pierre
it:Steelix di Brock
ja:タケシのハガネール
zh:小刚的大钢蛇