Cerulean Gym

Cerulean Gym ハナダジム Hanada Gym
Location	Cerulean City
Gym Leader	Misty Daisy, Lily, and Violet (anime only)
Badge	Cascade Badge
Dominant Type	Water
Region	Kanto
Battlefield

Misty's Gym Leader area

The Cerulean Gym (Japanese: ハナダジム Hanada Gym) is the official Gym of Cerulean City. It is based on Water-type Pokémon. The Gym Leader is Misty. Trainers who defeat her receive the Cascade Badge.

In the anime, Misty's sisters Daisy, Lily, and Violet share their younger sister's status as Cerulean Gym Leaders, taking care of the Gym whenever Misty is not present.

In the games

Core series games

Cerulean City
Pokémon Gym
Leader: Misty
The Tomboyish
Mermaid!

Cerulean City
Pokémon Gym
Leader: Misty
The Tomboyish
Mermaid

Cerulean City Pokémon Gym
Leader: Misty
The Tomboyish Mermaid

Cerulean City Pokémon Gym
Leader: Misty
The Tomboyish Mermaid

In Generations I, II, III, and VII, the Cerulean Gym is designed like an indoor swimming pool, with platforms above the water for the player to walk on. In Generation IV, the Gym consists of a large pool roped off into lanes with certain parts of the area circling the pool blocked. There are no puzzles to solve in this Gym.

In Generations II and IV, Misty isn't initially at the Gym. After the Team Rocket Grunt that stole the Machine Part from the Kanto Power Plant is encountered at the Gym, she can be found at Cerulean Cape, having a date with her boyfriend. After her boyfriend is scared away by the player's arrival, Misty will at first be angry at the player for ruining her date, but will then return to the Gym, allowing it to be challenged.

In Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, the player must have a Pokémon that is at level 15 or higher in their party in order to be allowed to challenge the Gym. However, they are not required to use this Pokémon at the Gym if they so choose.

Appearance

Interior

Generation I Generation II Generation III Generation IV Generation VII

Concept artwork

Concept art from the Let's Go, Pikachu and Eevee! Super Music Collection

Items

Item		Location	Games
	TM11 (BubbleBeam)	Reward for defeating Misty	R  B  Y
	TM03 (Water Pulse)	Reward for defeating Misty	FR  LG  HG  SS
	TM29 (Scald)	Reward for defeating Misty	P  E
	Machine Part	In water in the middle of the Gym, after visiting the Kanto Power Plant (hidden)	G  S  C
	Machine Part	Behind a pile of lifebuoys, after defeating the Team Rocket Grunt on Route 24 (hidden)	HG  SS

Pokémon

Generation I

Pokémon	Games						Location	Levels	Rate
Fishing
Magikarp	R		B		Y		Fishing Old Rod	5	100%
Goldeen	R		B		Y		Fishing Good Rod	10	50%
Poliwag	R		B		Y		Fishing Good Rod	10	50%
Psyduck	R		B		Y		Fishing Super Rod	15	34%
Krabby	R		B		Y		Fishing Super Rod	15	33%
Goldeen	R		B		Y		Fishing Super Rod	15	33%
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Generation II

Pokémon	Games						Location	Levels	Rate
Fishing
Magikarp	G		S		C		Fishing Old Rod	10	85%
Krabby	G		S		C		Fishing Old Rod	10	15%
Krabby	G		S		C		Fishing Good Rod	20	60%
Magikarp	G		S		C		Fishing Good Rod	10	30%
Corsola	G		S		C		Fishing Good Rod	20	10%	10%	0%
Staryu	G		S		C		Fishing Good Rod	20	0%	0%	10%
Krabby	G		S		C		Fishing Super Rod	40	60%
Corsola	G		S		C		Fishing Super Rod	40	30%	30%	0%
Staryu	G		S		C		Fishing Super Rod	40	0%	0%	30%
Kingler	G		S		C		Fishing Super Rod	40	10%
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Trainers

Pokémon Red, Blue, and Yellow

Trainer	Pokémon
Swimmer Reward: $80	Horsea Lv.16 No item
	Shellder Lv.16 No item
Jr. Trainer♀ Reward: $380	Goldeen Lv.19 No item

Pokémon Red and Blue

Misty has one X Defend per Pokémon, using it randomly 25% of the time.

Misty Cerulean Gym Red, Green, and Blue Reward: $2079
Type: Water Unknown Staryu Lv.18 Tackle Normal   --       Water Gun Water   --       Struggle Normal   --       Struggle Normal   --       Types: Water Psychic Starmie Lv.21 Tackle Normal   --       Water Gun Water   --       BubbleBeam Water   --       Struggle Normal   --

Pokémon Yellow

Misty has one X Defend per Pokémon, using it randomly 25% of the time.

Misty Cerulean Gym Yellow Reward: $2079
Type: Water Unknown Staryu Lv.18 Tackle Normal   --       Water Gun Water   --       Struggle Normal   --       Struggle Normal   --       Types: Water Psychic Starmie Lv.21 Tackle Normal   --       Water Gun Water   --       Harden Normal   --       BubbleBeam Water   --

Pokémon Gold, Silver, and Crystal

Trainer	Pokémon
Swimmer♂ Parker トモキ Tomoki Reward: $280	Horsea♂ Lv.32 No item
	Horsea♂ Lv.32 No item
	Seadra♂ Lv.35 No item
Swimmer♀ Briana ユカリ Yukari Reward: $700	Seaking♀ Lv.35 No item
	Seaking♀ Lv.35 No item
Swimmer♀ Diana ナミ Nami Reward: $740	Golduck♀ 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.

Misty has a Full Heal.

Leader Misty Cerulean Gym Gold, Silver, and Crystal Reward: $4700

Type: Water Unknown Held item: None Golduck♀ Lv.42 Surf Water   --       Disable Normal   --       Psych Up Normal   --       Psychic Psychic   --       Types: Water Ground Held item: None Quagsire♀ Lv.42 Surf Water   --       Amnesia Psychic   --       Earthquake Ground   --       Rain Dance Water   --       Types: Water Ice Held item: None Lapras♀ Lv.44 Surf Water   --       Perish Song Normal   --       Blizzard Ice   --       Rain Dance Water   --       Types: Water Psychic Held item: None Starmie Lv.47 Surf Water   --       Confuse Ray Ghost   --       Recover Normal   --       Ice Beam Ice   --

Pokémon FireRed and LeafGreen

Trainer	Pokémon
Swimmer Luis ヨウヘイ Yōhei Reward: $64	Horsea♂ Lv.16 No item
	Shellder♂ Lv.16 No item
Picnicker Diana コズエ Kozue Reward: $380	Goldeen♀ Lv.19 No item
Trainers with a Vs. Seeker by their names, when alerted for a rematch using the item, may use higher-level Pokémon.

Misty has a Super Potion.

Leader Misty Cerulean Gym FireRed and LeafGreen Reward: $2100
Type: Water Unknown Ability: Natural Cure Held item: None Staryu Lv.18 Tackle Normal   --       Harden Normal   --       Recover Normal   --       Water Pulse Water   --       Types: Water Psychic Ability: Natural Cure Held item: None Starmie Lv.21 Rapid Spin Normal   --       Swift Normal   --       Recover Normal   --       Water Pulse Water   --

Pokémon HeartGold and SoulSilver

Trainer	Pokémon
Sailor Parker トモキ Tomoki Reward: $1376	Horsea♂ Lv.43 No item
	Seadra♂ Lv.43 No item
Sailor Eddie ノリオ Norio Reward: $1536	Azumarill♂ Lv.48 No item
Requires Surf
Swimmer♀ Diana ナミ Nami Reward: $768	Golduck♀ Lv.48 No item
Swimmer♀ Joy ミズナ Mizuna Reward: $768	Cloyster♀ Lv.48 No item
Swimmer♀ Briana ユカリ Yukari Reward: $736	Seaking♀ Lv.46 No item
	Seaking♀ Lv.46 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 Misty Cerulean Gym HeartGold and SoulSilver Reward: $6480

Type: Water Unknown Ability: Damp Held item: None Golduck♀ Lv.49 Water Pulse Water Special   --       Disable Normal Status   --       Psychic Psychic Special   --       Psych Up Normal Status   --       Types: Water Ground Ability: Water Absorb Held item: None Quagsire♀ Lv.49 Water Pulse Water Special   --       Amnesia Psychic Status   --       Rain Dance Water Status   --       Earthquake Ground Physical   --       Types: Water Ice Ability: Shell Armor Held item: None Lapras♀ Lv.52 Ice Beam Ice Special   --       Sing Normal Status   --       Water Pulse Water Special   --       Body Slam Normal Physical   --       Types: Water Psychic Ability: Natural Cure Held item: Sitrus Berry Starmie Lv.54 Water Pulse Water Special   --       Confuse Ray Ghost Status   --       Ice Beam Ice Special   --       Recover Normal Status   --

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

Trainer	Pokémon
Beauty Lily ボタン Botan Reward: $320	Goldeen♀ Lv.16 No item
Beauty Violet アヤメ Ayame Reward: $320	Shellder♀ Lv.16 No item
Beauty Daisy サクラ Sakura Reward: $320	Seel♀ Lv.16 No item

Gym Leader Misty Cerulean Gym Let's Go, Pikachu! and Let's Go, Eevee! Reward: $3,040
Type: Water Unknown Mega Stone: None Psyduck♂ Lv.18 Confusion Psychic Special   --       Water Gun Water Special   --       Curse Unknown Status   --       Curse Unknown Status   --       Types: Water Psychic Mega Stone: None Starmie Lv.19 Scald Water Special   --       Swift Normal Special   --       Psywave Psychic Special   --       Curse Unknown Status   --

Rematch

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

Type: Water Unknown Mega Stone: None Golduck♂ Lv.56 Scald Water Special   --       Psychic Psychic Special   --       Ice Beam Ice Special   --       Light Screen Psychic Status   --       Types: Water Ice Mega Stone: None Dewgong♀ Lv.56 Aqua Jet Water Physical   --       Ice Shard Ice Physical   --       Waterfall Water Physical   --       Iron Tail Steel Physical   --       Type: Water Unknown Mega Stone: None Vaporeon♀ Lv.56 Hydro Pump Water Special   --       Blizzard Ice Special   --       Quick Attack Normal Physical   --       Shadow Ball Ghost Special   --       Types: Water Psychic Mega Stone: None Starmie Lv.56 Hydro Pump Water Special   --       Dazzling Gleam Fairy Special   --       Psychic Psychic Special   --       Thunderbolt Electric Special   --       Types: Water Flying Mega Stone: None Gyarados♂ Lv.57 Waterfall Water Physical   --       Crunch Dark Physical   --       Outrage Dragon Physical   --       Iron Tail Steel 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
Fisher	Squirtle Lv.50-100 No item
	Poliwag Lv.50-100 No item
	Magikarp Lv.50-100 No item
	Wartortle Lv.50-100 No item
	Seaking Lv.50-100 No item
	Tentacool Lv.50-100 No item
Jr. ♀	Pidgey Lv.50-100 No item
	Seadra Lv.50-100 No item
	Kadabra Lv.50-100 No item
	Voltorb Lv.50-100 No item
	Diglett Lv.50-100 No item
	Jigglypuff Lv.50-100 No item
Swimmer Swimmer	Meowth Lv.50-100 No item
	Goldeen Lv.50-100 No item
	Mankey Lv.50-100 No item
	Omanyte Lv.50-100 No item
	Clefairy Lv.50-100 No item
	Poliwhirl Lv.50-100 No item

Misty Gym Leader Castle Stadium

Types: Water Psychic Starmie Lv.50-100 Thunder Electric   --       Swift Normal   --       BubbleBeam Water   --       Thunder Wave Electric   --       Type: Water Unknown Horsea Lv.50-100 SmokeScreen Normal   --       Surf Water   --       Toxic Poison   --       Ice Beam Ice   --       Type: Water Unknown Psyduck Lv.50-100 Disable Normal   --       Confusion Psychic   --       Fury Swipes Normal   --       Body Slam Normal   --       Type: Water Unknown Blastoise Lv.50-100 Hydro Pump Water   --       Bite Normal   --       Dig Ground   --       Seismic Toss Fighting   --       Type: Water Unknown Staryu Lv.50-100 Recover Normal   --       Minimize Normal   --       Thunderbolt Electric   --       Psychic Psychic   --       Type: Water Unknown Seel Lv.50-100 Blizzard Ice   --       Rest Psychic   --       Take Down Normal   --       Surf Water   --

Round 2

Trainer	Pokémon
Fisher	Wartortle Lv.50-100 No item
	Poliwhirl Lv.50-100 No item
	Diglett Lv.50-100 No item
	Cloyster Lv.50-100 No item
	Seaking Lv.50-100 No item
	Eevee Lv.50-100 No item
Jr. ♀	Pidgeotto Lv.50-100 No item
	Seadra Lv.50-100 No item
	Kadabra Lv.50-100 No item
	Electrode Lv.50-100 No item
	Dugtrio Lv.50-100 No item
	Clefairy Lv.50-100 No item
Swimmer Swimmer	Tentacruel Lv.50-100 No item
	Horsea Lv.50-100 No item
	Wartortle Lv.50-100 No item
	Primeape Lv.50-100 No item
	Wigglytuff Lv.50-100 No item
	Poliwrath Lv.50-100 No item

Misty Gym Leader Castle Stadium

Types: Water Psychic Starmie Lv.50-100 Recover Normal   --       Psychic Psychic   --       Hydro Pump Water   --       Thunder Wave Electric   --       Types: Grass Psychic Exeggutor Lv.50-100 Mega Drain Grass   --       Psychic Psychic   --       Explosion Normal   --       Reflect Psychic   --       Type: Water Unknown Seadra Lv.50-100 SmokeScreen Normal   --       Surf Water   --       Toxic Poison   --       Ice Beam Ice   --       Type: Ground Unknown Dugtrio Lv.50-100 Earthquake Ground   --       Slash Normal   --       Fissure Ground   --       Rock Slide Rock   --       Type: Water Unknown Blastoise Lv.50-100 Hydro Pump Water   --       Bite Normal   --       Dig Ground   --       Seismic Toss Fighting   --       Types: Water Ice Dewgong Lv.50-100 Aurora Beam Ice   --       Rest Psychic   --       Surf Water   --       Take Down Normal   --

Pokémon Stadium 2

Round 1

File:S2 Leader Misty.png Gym Leader Misty Kanto Gym Leader Castle Stadium 2

Types: Water Psychic Held item: King's Rock Starmie Lv.50-100 Rain Dance Water   --       Surf Water   --       Thunder Electric   --       Psychic Psychic   --       Types: Normal Flying Held item: PRZCureBerry Togetic♂ Lv.50-100 Rain Dance Water   --       Encore Normal   --       Metronome Normal   --       Double-Edge Normal   --       Type: Water Unknown Held item: MiracleBerry Golduck♂ Lv.50-100 Rain Dance Water   --       Dig Ground   --       Return Normal   --       Hydro Pump Water   --       Type: Grass Unknown Held item: Scope Lens Sunflora♀ Lv.50-100 Cut Normal   --       Mega Drain Grass   --       Razor Leaf Grass   --       Sludge Bomb Poison   --       Type: Water Unknown Held item: Focus Band Poliwhirl♀ Lv.50-100 Rain Dance Water   --       Earthquake Ground   --       Hydro Pump Water   --       Body Slam Normal   --       Types: Water Ground Held item: Quick Claw Quagsire♀ Lv.50-100 Rain Dance Water   --       Surf Water   --       Strength Normal   --       Earthquake Ground   --

Round 2

File:S2 Leader Misty.png Gym Leader Misty Kanto Gym Leader Castle Stadium 2

Types: Water Psychic Held item: King's Rock Starmie Lv.50-100 Rain Dance Water   --       Surf Water   --       Thunder Electric   --       Psychic Psychic   --       Type: Normal Unknown Held item: Quick Claw Wigglytuff♀ Lv.50-100 Rain Dance Water   --       Ice Beam Ice   --       Body Slam Normal   --       Double-Edge Normal   --       Types: Poison Ground Held item: Scope Lens Nidoqueen♀ Lv.50-100 Rain Dance Water   --       Thunder Electric   --       Earthquake Ground   --       Surf Water   --       Type: Electric Unknown Held item: BrightPowder Ampharos♂ Lv.50-100 Rain Dance Water   --       Thunder Electric   --       Reflect Psychic   --       Light Screen Psychic   --       Type: Dragon Unknown Held item: Bitter Berry Dragonair♂ Lv.50-100 Rain Dance Water   --       Surf Water   --       Thunder Electric   --       Ice Beam Ice   --       Type: Water Unknown Held item: Focus Band Politoed♂ Lv.50-100 Rain Dance Water   --       Surf Water   --       Ice Beam Ice   --       Earthquake Ground   --

Spin-off games

Pokémon Masters EX

Artwork of various depictions of the Cerulean Gym is seen in Misty's mindscapes.

Misty & Starmie Misty (Swimsuit) & Psyduck Sygna Suit Misty & Vaporeon

In the anime

Main series

Cerulean Gym in the anime

Cerulean Gym's battlefield in the anime

Cerulean Gym's water battlefield in the anime

Cerulean Gym has appeared in multiple episodes of the anime. In its original design, the building was a dome-shaped, brightly colored Gym with a gigantic painting of a Dewgong on top of it. On the inside, the Gym was seen being equipped with a large aquarium and a swimming pool. In Pokémon the Series: Sun & Moon, the Gym seemed to have gone through a massive redesign in-between appearances, both on the exterior and the interior. For example, the battlefield is now a stone field, which can be retracted into the floor and filled with water to form a water field, suitable for the Gym's Water-type Pokémon.

Original series

It first appeared in The Water Flowers of Cerulean City. Ash was heading there so he could earn his Cascade Badge. Misty kept telling him not to go to Cerulean, and he soon discovered why she had tried to stop him; her three sisters, Violet, Lily, and Daisy, were the Gym Leaders, who didn't care much about battling and had instead turned the battlefield into a performance hall for their water acrobatics shows. Incapable of giving Ash a proper Gym battle, due their recent defeats against Gary and two other Pallet Town Trainers, they were about to simply give Ash a free Cascade Badge, when Misty intervened. She challenged Ash to a battle in her capacity as an official Gym Leader, but the battle was interrupted by Team Rocket trying to steal the Gym's Pokémon with a giant vacuum cleaner, only to be defeated by Ash and be sent flying by their own machine. In the end, Daisy gave Ash a Cascade Badge for protecting the Gym, also saying that if Ash's Pikachu hadn't refused to battle, Misty's Water Pokémon wouldn't have stood a chance of winning.

The Gym's next appearance was in The Misty Mermaid. While the group was on the way to the Viridian Gym, Misty's Horsea became sick. Realizing the Gym was nearby, Misty decided to go and see if they could make Horsea feel better there. At the Gym, Misty's sisters told her that they had set up an underwater balette and given Misty the main role without asking her first. With the first performance due to be held the following day, Misty was left with no choice but to accept the role. During the performance, Team Rocket attacked and tried to steal the Gym's Pokémon again. This time, they were defeated by the Gym's Seel, which evolved into a Dewgong to protect the Gym. Afterwards, Misty's sisters asked Misty to leave her Horsea and Starmie at the Gym for their future performances, which she reluctantly accepted. She also tried to force her Psyduck on them, but they refused.

In Just Add Water, while traveling through Johto, Ash and his friends met a Water-type Trainer named Dorian, who had visited the Cerulean Gym and met Misty's sisters multiple times, wishing to make his own unofficial Gym, the Coastline Gym, as widely known as the Cerulean Gym.

In Gotta Catch Ya Later!, Misty received a call from her sisters, informing her that they had won an around-the-world trip and were giving their Cerulean Gym Leader status to her so that she could take care of the Gym in their absence.

Pokémon Chronicles

The Gym also played key roles in several Pokémon Chronicles episodes. In Cerulean Blues, the Gym was in danger of being shut down, but Misty, who had just returned to the Gym after her sisters' departure, was successfully able to fix it up and stop it from getting shut down. In the process, she earned a Gym Gyarados's trust. In The Blue Badge of Courage, Sakura challenged Misty to a Gym battle and won her own Cascade Badge. Casey visited the Gym in A Date with Delcatty, and in Luvdisc is a Many Splendored Thing!, Misty and Daisy's two Luvdisc, Caserin and Luverin, were stolen by Butch and Cassidy.

Pokémon the Series: Ruby and Sapphire

The Gym made a brief flashback appearance in Judgment Day!. Ash and his friends met a referee-in-training named Jimmy, who told them how he had once passed by the Cerulean Gym, when Daisy had come up to him and asked him to help clean up the Gym's pool. Jimmy had accepted the request, and once he and his Pokémon had done their work, Daisy had given him a free Cascade Badge. Jimmy also mentioned that Misty hadn't been at the Gym at the time to battle him.

Pokémon the Series: Sun & Moon

The Gym reappeared hundreds of episodes later in Alola, Kanto! and When Regions Collide!, where Ash and his classmates from Alola visited it during an extracurricular lesson, guided by Brock and Misty. After giving a brief summary to Ash's classmates about how Gyms, Badges, and the Pokémon League work in Kanto, the group was offered to experience a Gym battle. First Mallow and Lana took on Misty, after which Sophocles and Lillie battled against Brock. After both of these battles had been called off with no clear winner, Kiawe requested to have a serious battle against Brock, while Ash issued a similar challenge to Misty. During the battle between Kiawe's Turtonator and Brock's Steelix, the former Pewter Gym Leader Mega Evolved his Pokémon as a response to Kiawe's decision to use his Z-Move. Although Turtonator's Inferno Overdrive dealt heavy damage on Mega Steelix, it was unable to deal the finishing blow, allowing Brock to win the battle with his next attack. In the following battle between Ash's Pikachu and Misty's Gyarados, the Cerulean Gym Leader also demonstrated her ability to use Mega Evolution. However, unlike Kiawe, Ash was able to use his own Z-Move, Gigavolt Havoc, to defeat his Mega Evolved opponent. Before Ash and his classmates headed back to Alola, Brock and Misty gave each of them a replica Badge to commemorate their battles.

Pokémon Journeys: The Series

In Partners in Time!, Misty was seen watching Ash's Masters Eight Tournament battle against Leon from the Cerulean Gym, accompanied by Psyduck and Gyarados.

In This Could be the Start of Something Big!, Goh was seen visiting the Cerulean Gym and meeting Misty, who immediately took a liking to his Inteleon.

In A Fated Face-Off!, Misty revealed that she had left the Cerulean Gym in order to set off on a new journey, inspired to do so after seeing Ash's battle against Leon and leaving the Gym in her sisters' care. She returned to the Gym in The Rainbow and the Pokémon Master!.

Gallery

Original design	Original battlefield	Aquarium

Pokémon used in the Gym

Used by Misty

Staryu

Debut	Clefairy and the Moon Stone
Voice actors
Japanese	Shin-ichiro Miki
English	Shin-ichiro Miki

Main article: Misty's Staryu

Misty started using Staryu for Gym battles after becoming Gym Leader.

Starmie

Debut	The Water Flowers of Cerulean City
Voice actors
Japanese	Ikue Otani
English	Ikue Otani

Main article: Misty's Starmie

Misty left Starmie at the Gym in The Misty Mermaid. She started using Starmie for Gym battles after becoming Gym Leader.

Corsola

Debut	A Corsola Caper!
Voice actors
Japanese	Ikue Otani
English	Kayzie Rogers

Main article: Misty's Corsola

Misty started using Corsola for Gym battles after becoming Gym Leader.

Psyduck

Debut	Hypno's Naptime
Voice actors
Japanese	Rikako Aikawa
English	Michael Haigney

Main article: Misty's Psyduck

Misty started using Psyduck for Gym battles after becoming Gym Leader.

Gyarados

Debut	Cerulean Blues
Voice actors
Japanese	Unshō Ishizuka
English	Unshō Ishizuka

Main article: Misty's Gyarados

Misty started using Gyarados for Gym battles after becoming Gym Leader. Thanks to Misty's Key Stone and its Gyaradosite, it can Mega Evolve into Mega Gyarados.

Politoed

Debut	The Stun Spore Detour
Voice actors
Japanese	Shin-ichiro Miki
English	Eric Stuart

Main article: Misty's Politoed

Misty started using Politoed for Gym battles after becoming Gym Leader.

Used by Daisy, Violet, and Lily

Dewgong

Debut	The Water Flowers of Cerulean City
Voice actors
Japanese	Yūji Ueda
English	Michael Haigney

Main article: Dewgong (Cerulean Gym)

Dewgong first appeared as a Seel, holding out the Cascade Badge, when Ash was about to challenge the Sensational Sisters. Later, Seel was one of the Pokémon performing in a play hosted by the sisters. It evolved into a Dewgong while battling Jessie's Arbok.

Goldeen

Debut	The Water Flowers of Cerulean City

Lily has her own Goldeen as her only known Pokémon. She sent it out briefly to show Ash that it was the only Pokémon that she had left after she and her two other sisters were beaten by the three other Trainers from Pallet Town.

Goldeen's only known move is Horn Attack*.

Pokémon that reside in Gym

Several Pokémon, mostly Water types, reside in the Gym's aquariums, though are not known to have been used in Gym battles.

Pokémon Origins

Cerulean Gym in Pokémon Origins

Cerulean Gym was briefly seen in File 2: Cubone, when Red recalled of having a tough battle with Misty, but eventually emerging victorious, thus earning the Cascade Badge.

Pokémon used in the Gym

Starmie

Debut	File 2: Cubone

Main article: Misty's Starmie

Starmie was used in Misty's Gym battle against Red, but ended up being defeated.

In the manga

Cerulean Gym in Pokémon Adventures

Cerulean Gym in Pokémon Pocket Monsters

Cerulean Gym in The Electric Tale of Pikachu

Cerulean Gym battlefield in The Electric Tale of Pikachu

Cerulean Gym in Pokémon Zensho

Pokémon Adventures

Red, Green & Blue arc

The Cerulean Gym appeared in Suddenly Starmie, where Red and Misty trained together at the Gym for a few days to improve their skills in order to fight Team Rocket. After the training was complete, Misty gave Red a Cascade Badge.

Pokémon Pocket Monsters

The Cerulean Gym appeared in Obtain the Moon Stone!!, where Red and his Pokémon fought Misty in order to obtain the Moon Stone she had with her. In the manga, Cerulean Gym is depicted in a very traditional Japanese architectural style.

The Electric Tale of Pikachu

The Cerulean Gym appeared in Play Misty For Me. After defeating Brock rather easily, Ash was confident of his abilities, and headed to Cerulean City in order win his second Badge. At the Gym, Ash met Daisy, Lily, and Violet, who briefly talked about which one of them would battle Ash, until Misty arrived, declaring that she'd battle him.

At the Gym's water battlefield, Misty revealed her Pokémon to be Gyarados, which proceeded to snatch away Ash's hat. Misty declared that if Ash would be able to get his hat back from her, she'd give him the Cascade Badge. With Pikachu being too scared of Gyarados, Fearow being asleep, Pidgeotto being away, and Metapod only being capable of using Harden, Ash's chances for succeeding in the given task seemed nonexistent. However, Metapod then suddenly evolved into Butterfree, allowing Ash to put Gyarados asleep with Butterfree's Sleep Powder. Although Pikachu was now willing to move, Misty distracted the Electric Mouse with a rice ball before it could get the hat back. Ash countered by throwing a soy sauce-covered dumpling at Misty, causing his dumpling-loving Fearow to snatch the hat away from her. As promised, Misty's sisters then rewarded Ash with the Cascade Badge, despite Misty trying to protest that Ash's victory was a fluke.

Pokémon Zensho

The Cerulean Gym appeared in PZ03, where Satoshi went to the Gym to challenge Misty. However, since Satoshi and his Pikachu had trouble swimming in the Gym's pool, they had to practice for a while in order to learn how to swim. The following night, the Gym was attacked by a Team Rocket Grunt, who was after Misty's Seel due to its valuable fur, but Satoshi defeated the Grunt's Gyarados, driving him away. As a reward for saving the Gym, Misty gave Satoshi a Cascade Badge and entrusted her Seel with him, asking him to take it back to its home at Seafoam Islands.

In the TCG

The Cerulean 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 Cerulean City Gym in the Pokémon Trading Card Game.

Pokémon in Cerulean 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	#
Starmie		Hidden Fates		14/68	Trainer Battle Decks		004/031
Other related cards
Card	Type	English Expansion	Rarity	#	Japanese Expansion	Rarity	#
Cerulean City Gym	T [St]	Gym Heroes		57/132	Leaders' Stadium
					Hanada City Gym
Misty's Determination	Su	BREAKpoint		104/122	Golduck BREAK + Palkia-EX Combo Deck		014/016
Misty's Favor	Su	Unified Minds		202/236	Miracle Twin		085/094
Misty's Cerulean City Gym	St	Hidden Fates		61/68	Misty of Cerulean City Gym Trainer Battle Deck		029/031

Trivia

• In the English Generation I games, the Gym guide here refers to Pokémon of the Grass type as "plant Pokémon". In the English versions of Pokémon FireRed and LeafGreen, he instead mentions "Grass-type Pokémon". In the Japanese versions of the Generation I games and FireRed and LeafGreen, he mentions the Grass type itself, calling it the "Plant type" (Japanese: しょくぶつタイプ).
• In Pokémon Red, Green, Blue, Gold, and Silver, due to an oversight, it is possible to fish wild Pokémon in the Gym's water. This was fixed in Pokémon Yellow and Crystal (although in Yellow, the Old and Good Rods still work here).
• Cerulean Gym is the only place in any Pokémon game where it is possible to battle swimming Swimmers without Surfing.
• In Pokémon HeartGold and SoulSilver, if the player brings a Togepi inside the Gym, it may begin to cry softly when the player talks to it. This is a reference to Misty's Togepi in the anime.
• In Generation II, it is possible for the player to pick up the Machine Part from the Gym before learning of its location from the Team Rocket Grunt on Route 24. This is no longer the case in Generation IV, where the player must defeat the Grunt in a battle in order to make the Machine Part obtainable.
• In Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, the Beauties in the Gym are named after the Sensational Sisters (Misty's three older sisters in the anime): Lily, Violet, and Daisy.
• In Pokémon the Series: Sun & Moon, the design of the Gym appears to be modeled after the Aqua Museum of the Yokohama Hakkeijima Sea Paradise.

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.