Pewter Gym

Pewter Gym ニビジム Nibi Gym
Location	Pewter City
Gym Leader	Brock Flint (anime only) Lola (anime only) Forrest (anime only)
Badge	Boulder Badge
Dominant Type	Rock
Region	Kanto
Battlefield

The Pewter Gym (Japanese: ニビジム Nibi Gym) is the official Gym of Pewter City. It is based on Rock-type Pokémon. The Gym Leader is Brock. Trainers that defeat him receive the Boulder Badge.

Brock's Gym Leader area

In the anime, Brock's parents, Flint and Lola, have also held the position of Pewter Gym Leader, with the eldest of Brock's younger siblings, Forrest, being the current Leader.

In the games

Core series games

Pewter City
Pokémon Gym
Leader: Brock
The Rock Solid
Pokémon Trainer!

Pewter City
Pokémon Gym
Leader: Brock
The Rock Solid
Pokémon Trainer

Pewter City Pokémon Gym
Leader: Brock
The Rock-Solid Pokémon Trainer

Pewter City Pokémon Gym
Leader: Brock
The Rock-Solid Pokémon Trainer

Pewter Gym appears in all games set in the Kanto region, appearing much the same in each: a small building with a Japanese rock garden inside, one^RBYGSCFRLG or two^HGSSPE Trainers, and the Gym Leader, Brock, waiting at the back of the Gym, stading on plain floor^RBYGSC or a large stone pedestal^FRLGHGSSPE. In the Generation I games and their remakes, if the player tries to leave Pewter City to Route 3 before earning the Boulder Badge, a boy standing at the route entrance will lead them to the front of the Gym.

In Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, the player must show a Grass- or Water-type Pokémon from their party to the Gym guide in order to be allowed to challenge the Gym. The Pokémon shown can then be removed from the party without incident, and the player can challenge Brock and his Trainers without any Grass- or Water-type Pokémon if they so desire.

Appearance

Generation I Generation II Generation III Generation IV Generation VII

Items

Item		Location	Games
	TM34 (Bide)	Reward for defeating Brock	R  B  Y
	TM39 (Rock Tomb)	Reward for defeating Brock	FR  LG
	TM80 (Rock Slide)	Reward for defeating Brock	HG  SS
	TM01 (Headbutt)	Reward for defeating Brock	P  E

Trainers

Pokémon Red and Blue

Trainer	Pokémon
Jr. Trainer♂ Reward: $220	Diglett Lv.11 No item
	Sandshrew Lv.11 No item

Brock has five Full Heals per Pokémon.

Brock Pewter Gym Red, Green, and Blue Reward: $1386
Types: Rock Ground Geodude Lv.12 Tackle Normal   --       Defense Curl Normal   --       Struggle Normal   --       Struggle Normal   --       Types: Rock Ground Onix Lv.14 Tackle Normal   --       Screech Normal   --       Bide Normal   --       Struggle Normal   --

Pokémon Yellow

Trainer	Pokémon
Jr. Trainer♂ Reward: $180	Diglett Lv.9 No item
	Sandshrew Lv.9 No item

Brock has five Full Heals per Pokémon.

Brock Pewter Gym Yellow Reward: $1188
Types: Rock Ground Geodude Lv.10 Tackle Normal   --       Struggle Normal   --       Struggle Normal   --       Struggle Normal   --       Types: Rock Ground Onix Lv.12 Tackle Normal   --       Screech Normal   --       Bide Normal   --       Bind Normal   --

Pokémon Gold, Silver, and Crystal

Trainer	Pokémon
Camper Jerry キヨシ Kiyoshi Reward: $740	Sandslash♂ Lv.37 No item
Trainers with a telephone symbol by their names will give their Pokégear number to the player, and may call or be called for a rematch with higher-level Pokémon.

Brock has a Hyper Potion.

Leader Brock Pewter Gym Gold, Silver, and Crystal Reward: $4200

Types: Rock Ground Held item: None Graveler♂ Lv.41 Defense Curl Normal   --       Rock Slide Rock   --       Rollout Rock   --       Earthquake Ground   --       Types: Ground Rock Held item: None Rhyhorn♂ Lv.41 Fury Attack Normal   --       Scary Face Normal   --       Earthquake Ground   --       Horn Drill Normal   --       Types: Rock Water Held item: None Omastar♂ Lv.42 Bite Dark   --       Surf Water   --       Protect Normal   --       Spike Cannon Normal   --       Types: Rock Ground Held item: None Onix♂ Lv.44 Bind Normal   --       Rock Slide Rock   --       Bide Normal   --       Sandstorm Rock   --       Types: Rock Water Held item: None Kabutops♂ Lv.42 Slash Normal   --       Surf Water   --       Endure Normal   --       Giga Drain Grass   --

Pokémon FireRed and LeafGreen

Trainer	Pokémon
Camper Liam トシカズ Toshikazu Reward: $220	Geodude♂ Lv.10 No item
	Sandshrew♂ Lv.11 No item
Trainers with a Vs. Seeker by their names, when alerted for a rematch using the item, may use higher-level Pokémon.

Leader Brock Pewter Gym FireRed and LeafGreen Reward: $1400
Types: Rock Ground Ability: Rock Head Held item: None Geodude♂ Lv.12 Tackle Normal   --       Defense Curl Normal   --       Struggle Normal   --       Struggle Normal   --       Types: Rock Ground Ability: Rock Head Held item: None Onix♂ Lv.14 Tackle Normal   --       Bind Normal   --       Rock Tomb Rock   --       Struggle Normal   --

Pokémon HeartGold and SoulSilver

Trainer	Pokémon
Camper Jerry キヨシ Kiyoshi Reward: $800	Rhydon♂ Lv.50 No item
Hiker Edwin ミキオ Mikio Reward: $1600	Golem♂ Lv.50 No item
Trainers with a telephone symbol by their names will give their Pokégear number to the player, and may call or be called for a rematch with higher-level Pokémon.

Leader Brock Pewter Gym HeartGold and SoulSilver Reward: $6240

Types: Rock Ground Ability: Sturdy Held item: None Graveler♂ Lv.51 Earthquake Ground Physical   --       Defense Curl Normal Status   --       Rock Slide Rock Physical   --       Rollout Rock Physical   --       Types: Ground Rock Ability: Sturdy Held item: None Rhyhorn♂ Lv.51 Earthquake Ground Physical   --       Scary Face Normal Status   --       Sandstorm Rock Status   --       Horn Drill Normal Physical   --       Types: Rock Water Ability: Swift Swim Held item: None Omastar♂ Lv.53 Spike Cannon Normal Physical   --       AncientPower Rock Special   --       Brine Water Special   --       Protect Normal Status   --       Types: Rock Ground Ability: Sturdy Held item: Sitrus Berry Onix♂ Lv.54 Rock Slide Rock Physical   --       Iron Tail Steel Physical   --       Sandstorm Rock Status   --       Screech Normal Status   --       Types: Rock Water Ability: Swift Swim Held item: None Kabutops♂ Lv.52 Rock Slide Rock Physical   --       Aqua Jet Water Physical   --       Endure Normal Status   --       Giga Drain Grass Special   --

Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!

Trainer	Pokémon
Picnicker Amara アキナ Akina Reward: $140	Geodude♀ Lv.7 No item
Camper Liam トシカズ Toshikazu Reward: $140	Geodude♂ Lv.7 No item

Gym Leader Brock Pewter Gym Let's Go, Pikachu! and Let's Go, Eevee! Reward: $1,920
Types: Rock Ground Mega Stone: None Geodude♂ Lv.11 Tackle Normal Physical   --       Curse Unknown Status   --       Curse Unknown Status   --       Curse Unknown Status   --       Types: Rock Ground Mega Stone: None Onix♂ Lv.12 Headbutt Normal Physical   --       Bind Normal Physical   --       Rock Throw Rock Physical   --       Curse Unknown Status   --

Rematch

Gym Leader Brock Pewter Gym Let's Go, Pikachu! and Let's Go, Eevee! Reward: $13,680

Types: Rock Ground Mega Stone: None Onix♂ Lv.56 Stealth Rock Rock Status   --       Iron Tail Steel Physical   --       Rock Slide Rock Physical   --       Earthquake Ground Physical   --       Types: Rock Water Mega Stone: None Kabutops♀ Lv.56 X-Scissor Bug Physical   --       Rock Slide Rock Physical   --       Aqua Jet Water Physical   --       Brick Break Fighting Physical   --       Types: Rock Water Mega Stone: None Omastar♂ Lv.56 Blizzard Ice Special   --       Hydro Pump Water Special   --       Seismic Toss Fighting Physical   --       Reflect Psychic Status   --       Types: Rock Flying Mega Stone: None Aerodactyl♂ Lv.56 Crunch Dark Physical   --       Rock Slide Rock Physical   --       Earthquake Ground Physical   --       Iron Tail Steel Physical   --       Types: Rock Ground Mega Stone: None Golem♂ Lv.57 Earthquake Ground Physical   --       Rock Slide Rock Physical   --       Fire Punch Fire Physical   --       Thunder Punch Electric Physical   --

Side series games

A field based on the Gym appears in Pokémon Stadium's Gym Leader Castle and Stadium 2's Kanto Gym Leader Castle.

Trainers

Pokémon Stadium

Round 1

Trainer	Pokémon
Bug Boy	Caterpie Lv.50-100 No item
	Weedle Lv.50-100 No item
	Metapod Lv.50-100 No item
	Kakuna Lv.50-100 No item
	Beedrill Lv.50-100 No item
	Butterfree Lv.50-100 No item
Lad	Bulbasaur Lv.50-100 No item
	Ekans Lv.50-100 No item
	Zubat Lv.50-100 No item
	Oddish Lv.50-100 No item
	Paras Lv.50-100 No item
	Gloom Lv.50-100 No item
Jr. ♂	Farfetch'd Lv.50-100 No item
	Diglett Lv.50-100 No item
	Pidgey Lv.50-100 No item
	Dugtrio Lv.50-100 No item
	Sandshrew Lv.50-100 No item
	Geodude Lv.50-100 No item

Brock Gym Leader Castle Stadium

Types: Rock Ground Onix Lv.50-100 Bind Normal   --       Toxic Poison   --       Earthquake Ground   --       Rock Slide Rock   --       Types: Rock Ground Graveler Lv.50-100 Rock Slide Rock   --       Dig Ground   --       Selfdestruct Normal   --       Seismic Toss Fighting   --       Type: Ground Unknown Cubone Lv.50-100 Body Slam Normal   --       Fissure Ground   --       Bone Club Ground   --       Submission Fighting   --       Type: Fire Unknown Vulpix Lv.50-100 Swift Normal   --       Quick Attack Normal   --       Flamethrower Fire   --       Fire Spin Fire   --       Types: Rock Water Omanyte Lv.50-100 Horn Attack Normal   --       Spike Cannon Normal   --       Ice Beam Ice   --       Surf Water   --       Types: Rock Water Kabuto Lv.50-100 Absorb Grass   --       Slash Normal   --       Hydro Pump Water   --       Blizzard Ice   --

Round 2

Trainer	Pokémon
Bug Boy	Paras Lv.50-100 No item
	Rattata Lv.50-100 No item
	Spearow Lv.50-100 No item
	Pidgeotto Lv.50-100 No item
	Beedrill Lv.50-100 No item
	Butterfree Lv.50-100 No item
Lad	Ivysaur Lv.50-100 No item
	Arbok Lv.50-100 No item
	Zubat Lv.50-100 No item
	Gloom Lv.50-100 No item
	Exeggcute Lv.50-100 No item
	Venonat Lv.50-100 No item
Jr. ♂	Farfetch'd Lv.50-100 No item
	Diglett Lv.50-100 No item
	Pidgeot Lv.50-100 No item
	Kabutops Lv.50-100 No item
	Sandshrew Lv.50-100 No item
	Graveler Lv.50-100 No item

Brock Gym Leader Castle Stadium

Types: Rock Ground Onix Lv.50-100 Bind Normal   --       Rock Slide Rock   --       Earthquake Ground   --       Screech Normal   --       Types: Poison Flying Golbat Lv.50-100 Confuse Ray Ghost   --       Wing Attack Flying   --       Bide Normal   --       Take Down Normal   --       Types: Rock Ground Golem Lv.50-100 Rock Slide Rock   --       Dig Ground   --       Explosion Normal   --       Seismic Toss Fighting   --       Type: Fire Unknown Ninetales Lv.50-100 Bide Normal   --       Confuse Ray Ghost   --       Flamethrower Fire   --       Fire Spin Fire   --       Type: Ground Unknown Dugtrio Lv.50-100 Dig Ground   --       Slash Normal   --       Rock Slide Rock   --       Sand-Attack Normal   --       Types: Rock Water Omastar Lv.50-100 Double-Edge Normal   --       Toxic Poison   --       Ice Beam Ice   --       Surf Water   --

Pokémon Stadium 2

Round 1

Gym Leader Brock Kanto Gym Leader Castle Stadium 2

Types: Rock Ground Held item: Quick Claw Onix♂ Lv.50-100 Rock Throw Rock   --       Earthquake Ground   --       Strength Normal   --       Bide Normal   --       Types: Rock Ground Held item: Scope Lens Golem♂ Lv.50-100 Rock Throw Rock   --       Magnitude Ground   --       Defense Curl Normal   --       Rollout Rock   --       Types: Rock Water Held item: MiracleBerry Omastar♂ Lv.50-100 AncientPower Rock   --       Surf Water   --       Blizzard Ice   --       Bite Dark   --       Type: Bug Unknown Held item: Focus Band Pinsir♂ Lv.50-100 Fury Cutter Bug   --       Strength Normal   --       Seismic Toss Fighting   --       Submission Fighting   --       Types: Bug Steel Held item: Mint Berry Forretress♀ Lv.50-100 Take Down Normal   --       Giga Drain Grass   --       Defense Curl Normal   --       Rollout Rock   --       Types: Rock Water Held item: PRZCureBerry Kabutops♂ Lv.50-100 AncientPower Rock   --       Surf Water   --       Slash Normal   --       Sleep Talk Normal   --

Round 2

Gym Leader Brock Kanto Gym Leader Castle Stadium 2

Types: Steel Ground Held item: Scope Lens Steelix♂ Lv.50-100 Rock Slide Rock   --       Earthquake Ground   --       Return Normal   --       Fissure Ground   --       Types: Bug Fighting Held item: Focus Band Heracross♂ Lv.50-100 Megahorn Bug   --       Reversal Fighting   --       Counter Fighting   --       Earthquake Ground   --       Types: Ground Rock Held item: Quick Claw Rhydon♀ Lv.50-100 Rock Slide Rock   --       Earthquake Ground   --       Double-Edge Normal   --       Fissure Ground   --       Types: Water Psychic Held item: BrightPowder Slowbro♀ Lv.50-100 Surf Water   --       Psychic Psychic   --       Flamethrower Fire   --       Fissure Ground   --       Type: Normal Unknown Held item: Mint Berry Ursaring♂ Lv.50-100 Defense Curl Normal   --       Rollout Rock   --       Slash Normal   --       Focus Energy Normal   --       Types: Bug Rock Held item: Leftovers Shuckle♂ Lv.50-100 Defense Curl Normal   --       Rollout Rock   --       Safeguard Normal   --       Wrap Normal   --

Spin-off games

Pokémon Masters EX

Artwork depicting the Pewter Gym is seen in Brock's mindscapes.

Brock & Onix Sygna Suit Brock & Tyranitar

In the anime

Main series

Pewter Gym in the anime

Pewter Gym's battlefield in the anime

The Pewter Gym has made multiple appearances in the anime, first being seen in Showdown in Pewter City, where Ash challenged it as his first Gym in order to earn his first Badge. However, his Pikachu was at a severe disadvantage against Brock's Onix, forcing Ash to eventually surrender, suffering his first loss since he started his journey. After some training with Pikachu, Ash challenged Brock to a rematch, during which Pikachu accidentally set off the Gym's sprinkler system, allowing Pikachu's Electric moves to hurt Onix. However, Ash refused to deal the finishing blow and forfeited, saying that he didn't feel this way of winning would be fair. However, soon after, Brock caught up to Ash and gave him a Boulder Badge, insisting that he had earned it through his kindness to Pokémon. The two were then approached by Flint, Brock's father and the previous Pewter Gym Leader. As Brock's true dream was to become a Pokémon Breeder and him having held the Gym Leader position only out of obligation to his family, he gave his Gym Leader position back to Flint in order to travel with Ash.

During Brock's travels with Ash, Brock's mother, Lola, returned to the Gym and decided to redecorate and redesign it to match her preference of Water-type Pokémon, including adding a pool of water in the middle of the battlefield. When Brock returned to the Gym in A Family That Battles Together Stays Together!, he was shocked to see the changes done to it and joined his younger brother Forrest in voicing his distaste towards them. Flint battled Lola to change the Gym back, but was defeated. He then suggested that the Gym could be converted into a dual-type one, but Brock rejected the idea and challenged his mother to a battle as well. Unlike Flint, Brock was able to defeat Lola, restoring the Gym to its roots as a sole Rock-type Gym. Brock then left his Onix, Geodude, and Crobat with Forrest at the Gym before heading to Hoenn to rejoin Ash.

Brock briefly returned to the Gym in between The Scheme Team and The Right Place and the Right Mime, leaving his Ludicolo with his family before rejoining Ash during his journey to challenge the Kanto Battle Frontier.

The Gym was subject to a second remodeling attempt, this time by a disguised Team Rocket, in Grating Spaces. Ash and Brock had a Tag Battle against Jessie and James while Meowth tried to steal Poké Balls from the Gym's storage room, until he was exposed by Max. Afterwards, the stolen Poké Balls were recovered and Team Rocket was sent blasting off again.

Brock once again made an off-screen stop at the Pewter Gym in between Home is Where the Start Is! and Two Degrees of Separation!, leaving his Forretress and Marshtomp there before traveling to Sinnoh to once again rejoin Ash.

The Gym was featured again in DPS02, where Brock returned there to meet a Nurse Joy from the Pokémon Inspection Agency, who had come to shut the Gym down due to it not having an official Leader present. Brock battled against Nurse Joy, but was defeated, endangering the Gym's fate. Afterwards, Brock learned that while he had previously left his Gym Leader duties to Forrest, Flint had accidentally lost the Gym Leader change notice he had been supposed to bring to the PIA, causing the information to never reach the agency. Brock managed to convince Nurse Joy into having another battle to decide the Gym's fate, this time against Forrest. To everyone's surprise, Joy used Latias, a Legendary Pokémon, to face against Forrest. While Forrest ended up losing the battle, Joy recognized his skills and officially appointed him as the new Pewter Gym Leader, allowing the Gym to continue operating.

The Pewter Gym is a stone building apparently set apart from the rest of Pewter City. When it first appeared, the Gym's name was visible at the front, but it's removed in its later appearances. In the Gym's debut appearance, Brock was shown waiting inside in the dark for challengers, sitting on a stone pedestal as he does in the games. The battlefield, which consists of two halves that can be moved together during battles, is littered with jagged rocks and boulders, and a balcony along the edge above provides spectators a spot to watch Gym battles. Despite being a Rock-type Gym, the building has sprinklers for fire safety. During Pokémon the Series: Diamond and Pearl, the Gym was shown to have become notably cleaner than previously. In addition, the battlefield now has more pointed rocks, while the area around it is a blue shiny floor, possibly to reflect Lola's penchant for water. Brock's family lives in a large house located at the back of the Gym. The Gym also has a large storage room for Poké Balls, as seen during Pokémon the Series: Ruby and Sapphire.

Gallery

Original design	Original battlefield

Pokémon used in the Gym

Used by Brock

		Sudowoodo ♂
		Main article: Brock's Sudowoodo Brock used Sudowoodo in a battle against a Nurse Joy from the Pokémon Inspection Agency and her Chansey in DPS02. However, he was caught off guard when Chansey used Attract. Because of his infatuation, Chansey easily defeated him.
Debut	From Cradle to Save
Voice actors
Japanese	Daisuke Sakaguchi
English	Bill Rogers

Used by Brock and Forrest

		Onix → Steelix
		Main article: Brock's Steelix Steelix was used by Brock for Gym battles as an Onix. It was later left for Forrest to use, evolving under his care. Thanks to Brock's Key Stone and its Steelixite, it can Mega Evolve into Mega Steelix.
Debut	Showdown in Pewter City
Voice actors
Japanese	Unshō Ishizuka
English	Unshō Ishizuka

		Geodude
		Main article: Brock's Geodude Geodude was used by Brock for Gym battles. It was later left for Forrest to use.
Debut	Showdown in Pewter City
Voice actors
Japanese	Shin-ichiro Miki
English	Michael Haigney

Used by Flint

		Graveler → Golem
		Flint's Golem first appeared when it battled against Lola's Marill to win back the Pewter Gym from her, but was swiftly defeated due to the type disadvantage. It was revealed that Golem used to be a Graveler; in a battle against Lola's Poliwag, the precision of her Poliwag's Hydro Pump made Flint fall in love with Lola. It was later seen with Blastoise, holding up the new sign made of rock, which they broke. Golem appeared again in Grating Spaces! where it welcomed Brock home with Brock's Geodude, Steelix, and Crobat. Golem's only known move is Earthquake.
Debut	A Family That Battles Together Stays Together!
Voice actors
Japanese	Katsuyuki Konishi
English	Eric Stuart

Used by Lola

		Marill
		Lola's Marill was used against Flint's Golem in a battle for the title of Gym Leader. Though greatly shaken by Golem's Earthquake, Marill was easily able to defeat its opponent. In Grating Spaces!, Team Rocket planned to capture Marill and the other Pokémon of Lola's but failed. In DPS02, it, along with Brock's Sudowoodo, took on the role of Brock's youngest siblings' playmate. Marill's only known move is Surf.
Debut	A Family That Battles Together Stays Together!
Voice actors
Japanese	Mika Kanai
English	Kayzie Rogers

		Mantine
		Lola's Mantine was used against Brock's Onix in a battle to reclaim the Pewter Gym and allow it to still be a Rock-type Gym. Despite Onix being at a severe type disadvantage, though, it was able to defeat Mantine. In Grating Spaces!, Team Rocket planned to capture Mantine and the other Pokémon of Lola's but failed. Mantine's known moves are Bubble Beam and Confuse Ray*.
Debut	A Family That Battles Together Stays Together!
Voice actors
Japanese	Unshō Ishizuka
English	Unshō Ishizuka

Used by Forrest

		Crobat
		Main article: Brock's Crobat Crobat was used by Forrest in Gym battles.
Debut	Clefairy and the Moon Stone
Voice actors
Japanese	Shin-ichiro Miki
English	Shin-ichiro Miki

		Rhyperior
		Rhyperior is currently the only known Pokémon of Forrest that he did not borrow from Brock. He used it in a battle against Nurse Joy's Latias. Despite fighting well, Rhyperior was ultimately defeated by the Legendary Pokémon. Rhyperior's known moves are Megahorn, Rock Wrecker, Horn Drill, and Dig.
Debut	DPS02
Voice actors
Japanese	Kenta Miyake

Pokémon Origins

Pewter Gym in Pokémon Origins

The Pewter Gym appeared in File 1: Red, when Red traveled there to challenge it at the suggestion of Brock, whom he didn't know being the Gym Leader until meeting him at the Gym. After battling Brock's Geodude with his Charmander for a while, Red was advised by Brock to use a Pokémon with a better type matchup, prompting Red to switch to his Nidoran♂, whose super effective Double Kick was enough to defeat Geodude. Brock then switched to his Onix, which defeated Nidoran♂ with Bide, and then proceeded to defeat Red's Spearow, Rattata, and Metapod as well, but not before the Metapod had managed to land a String Shot on the Rock Snake Pokémon. Red was then forced to switch back to his Charmander. Thanks to Metapod's String Shot, Charmander was able to outspeed Onix and defeat it with Scratch, winning the match for Red and earning him the Boulder Badge and TM34 (Bide).

Like all Gyms in Pokémon Origins, this Gym has scoreboards featuring each Trainer's current Pokémon and their remaining HP. The Gym's battlefield's design is based on that of Pokémon FireRed and LeafGreen.

Pokémon used in the Gym

		Geodude
		Main article: Brock's Geodude Brock used Geodude in his Gym battle against Red. It first battled Red's Charmander and managed to deal lots of damage to it before Red recalled it. Geodude then faced Red's Nidoran♂, but was quickly defeated by his Double Kick.
Debut	File 1: Red

		Onix
		Main article: Brock's Onix Brock used Onix in his Gym battle against Red. Onix managed to defeat four of Red's Pokémon in a quick succesion before finally being defeated by Red's Charmander.
Debut	File 1: Red

In the manga

Pewter Gym in The Electric Tale of Pikachu

The Electric Tale of Pikachu

Pewter Gym appeared in Play Misty For Me, where Ash entered the Gym and challenged Brock, eventually beating the Rock-type Gym Leader.

Pokémon Adventures

Pewter Gym in Pokémon Adventures

Each challenger who wishes to battle Brock must first defeat several rounds of Gym Trainers. The outside of the Gym has the default design, but the inside consists of a boxing ring where the Trainers battle, a space for the crowd around it, and a room with windows where Brock can watch the battles.

Red, Green & Blue arc

Pewter Gym appeared in Onix is On!, where both Red and Blue challenged the Gym for the Boulder Badge, with both of them eventually beating the Gym Leader.

Pokémon used in the Gym

		Onix ♂
		Main article: Brock's Onix Onix is arguably Brock's most powerful Pokémon and is apparently well known for its speed, which causes shock waves when it moves. Onix was first used in battle against Red's Pika. Despite the type advantage, Onix was defeated by the small Electric type after it came to fight for Red of its own will. Three years later, Onix was sent out by Brock to use as a bridge when a bridge in the Tohjo Falls went out while Brock, Erika and Misty were heading to Johto, during which Misty is joined by Suicune. However, it itself collapsed when they were all attacked by a large group of Zubat, Golbat and Crobat. Once the group finally made it to the Indigo Plateau, Brock used Onix in his battle with Jasmine. It lost to Jasmine's Steelix, which he initially mistook as an Onix of a different variety due to its rock covering used to hide the fact that it was a new, undiscovered species at the time.
Debut	Onix Is On!

		Geodude (×6) ♂
		Main article: Brock's Geodude Brock owns six Geodude, nicknamed Geoone, Geotwo, Geothree, and so on. One of them appeared in Onix Is On! watching the battles with his Trainer. The other five first appeared in Putting It On The Line...Against Arcanine. They often grasp each others' wrists in order to circle around Brock to protect him. During the Gold, Silver & Crystal arc, they used their Magnitude to stop the Magnet Train. However, the impact sent it off course, causing it to almost crash before it was saved by Red's Snorlax.
Debut	Onix Is On!

		Graveler ♂
		Brock's Graveler was first seen as he watched Red battle the Trainers in the Pewter Gym. Later on, Brock gave him to Yellow, who named him Gravvy. He has since evolved it into a Golem. Graveler's known moves are Mega Punch, Rock Throw, Take Down, and Defense Curl, and his Ability is Sturdy.
Debut	Onix Is On!

Pokémon Pocket Monsters

Pewter Gym in Pokémon Pocket Monsters

Pewter Gym appeared in Bring Down the Powerful Opponent Onix!!. Red and Clefairy discovered Brock's collection of Pokémon and that Clefairy's cousin Pikachu was a part of his collection. After Clefairy beat Brock's Onix in a battle, Brock gave Pikachu to Red, along with a Boulder Badge.

Pewter Gym in Pokémon Zensho

Pokémon Zensho

Pewter Gym appeared in Pewter City, where Satoshi challenged Brock. Despite his Charmander being at a type disadvantage, Satoshi eventually won by having Charmander cut off Onix's horn, earning the young Trainer his first Badge.

In the TCG

The Pewter Gym was featured in the TCG as both a Japan exclusive Theme Deck and as a card. The following is a list of cards mentioning or featuring Pewter City Gym in the Pokémon Trading Card Game.

Pokémon in Pewer Gym Cards listed with a blue background are only legal to use in the current Expanded format. Cards listed with a green background are legal to use in both the current Standard and Expanded formats.
Card	Type	English Expansion	Rarity	#	Japanese Expansion	Rarity	#
Onix		Hidden Fates		36/68	Trainer Battle Decks		011/031
Other related cards
Card	Type	English Expansion	Rarity	#	Japanese Expansion	Rarity	#
Pewter City Gym	T [St]	Gym Heroes		115/132	Leaders' Stadium
					Nivi City Gym
Brock's Pewter City Gym	St	Hidden Fates		54/68	Brock of Pewter City Gym Trainer Battle Deck		030/031

Trivia

• Despite being a Rock-type Gym, all the Pokémon encountered here in Generations I and III share the Ground-typing, but not Rock-typing.
• In Pokémon HeartGold and SoulSilver, Brock's Rhyhorn has Sturdy as its Ability, despite Rhyhorn being incapable of naturally having this Ability.
• In Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, the Gym has sprinklers on its ceiling, visible from Brock's platform. This is likely a reference to the Gym's sprinkler system as seen in Showdown in Pewter City.

References

Gym Leaders of the Kanto region
Pewter Gym Brock	Cerulean Gym Misty	Vermilion Gym Lt. Surge	Celadon Gym Erika
Fuchsia Gym Koga Janine	Saffron Gym Sabrina	Cinnabar Gym Blaine	Viridian Gym Giovanni Blue

This article is part of Project Locations, a Bulbapedia project that aims to write comprehensive articles on every location in the Pokémon world.