Castelia Sewers

The Castelia Sewers (Japanese: ヒウン下水道 Hiun Sewers) is a location in central south Unova. It is accessible via an entrance in Castelia City at the end of Thumb Pier. They cannot be accessed until the player talks to Clyde in front the Castelia Gym. When exploring for the first time, Hugh will join the player as a Multi Battle partner. Here, the player meets Colress for the first time. Relic Passage is accessible from here. There is also an exit to Castelia City's park with wild Pokémon, and when the sewers are flooded, to Castelia City's back alley. During autumn and winter, the sewers are dry, blocking some areas and removing the requirement of Surf to access others.

Castelia Sewers		ヒウン下水道 Hiun Sewers
"Wild Missingno. appeared!"

Map description:

Iron bars around the exits were dismantled, drawing curious Trainers.

Location:

Under Castelia City

Region:

Unova

Generations:

V

Location of Castelia Sewers in Unova.

Pokémon world locations

Items

	Location	Games
TwistedSpoon	Near the Team Plasma Grunts	B2 W2
X Sp. Atk	Near Janitor Felix	B2 W2
Rare Bone	North of Worker Scott^Spring^Summer	B2 W2
Pearl	Near Worker Scott ^Autumn^Winter(requires Surf)^Spring^Summer	B2 W2
Leftovers	Near Doctor Heath	B2 W2
HM04 (Strength)	From Hugh after defeating the Team Plasma Grunts	B2 W2
Heart Scale	West of the Relic Passage entrance^Spring^Summer	B2 W2
X Sp. Def	West of Janitor Felix ^Autumn^Winter(requires Surf)^Spring^Summer	B2 W2
HP Up	Southernmost part (requires Surf) (hidden)^Spring^Summer	B2 W2
Poison Gem	Northeast of HP Up (requires Surf) (hidden)^Spring^Summer	B2 W2
TM41 (Torment)	West of Scientist Clarke (requires Surf)^Spring^Summer	B2 W2
Max Repel	Southwest of Janitor Felix (requires Surf) (hidden)^Spring^Summer	B2 W2
Nugget	East of Worker Zack (requires Surf) (hidden)^Spring^Summer	B2 W2
Ultra Ball	Northwest of Worker Scott (requires Surf) (hidden)^Spring^Summer	B2 W2
Black Sludge	West of Max Repel (requires Surf)^Spring^Summer	B2 W2

Scientists

A female Scientist in a room near Doctor Heath and a male Scientist in a room near Janitor Brady are attempting to turn poison into medicine, and will give the player items created in their experiments. They can give out any one of these items on a daily basis.

	Location	Games
Potion	Received from female Scientist	B2 W2
Super Potion	Received from female Scientist	B2 W2
Revive	Received from female Scientist	B2 W2
Antidote	Received from male Scientist (requires Surf)^Spring^Summer	B2 W2
Full Heal	Received from male Scientist (requires Surf)^Spring^Summer	B2 W2
Full Restore	Received from male Scientist (requires Surf)^Spring^Summer	B2 W2

Pokémon

Hugh will partner with the player for the first time the player traverses the sewers, and these Pokémon will be faced in Double Battles with Hugh as partner.

Pokémon

Games

Location

Levels

Rate

	Rattata

B2

W2

Walking

14-17

45%

	Zubat

B2

W2

Walking

14-17

45%

	Grimer

B2

W2

Walking

15, 17

10%

Surfing

	Grimer

B2

W2

Surfing

5-15

100%

-

Surfing in rippling water

	Grimer

B2

W2

Rippling water

5-20

95%

-

	Muk

B2

W2

Rippling water

5-20

5%

-

Fishing

	Grimer

B2

W2

Fishing

40-70

100%

-

Fishing in rippling water

	Grimer

B2

W2

Rippling water

40-60

90%

-

	Muk

B2

W2

Rippling water

50-70

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

Even when partnered with Hugh, Trainers other than the Team Plasma Grunts are engaged only in Single Battles, without Hugh.

If the player chose Snivy:

^P_K^M_N Trainer

Hugh

Castelia Sewers

Black 2 and White 2

Reward:

N/A

Types:
Fire	Fighting

Ability:

Blaze

Held item:

Charcoal

Pignite♂ Lv.20

Flame Charge
Fire	Physical

Arm Thrust
Fighting	Physical

Smog
Poison	Special

Defense Curl
Normal	Status

Types:
Normal	Flying

Ability:

Big Pecks

Held item:

None

Pidove♂ Lv.18

Air Cutter
Flying	Special

Leer
Normal	Status

Quick Attack
Normal	Physical

Roost
Flying	Status

If the player chose Tepig:

^P_K^M_N Trainer

Hugh

Castelia Sewers

Black 2 and White 2

Reward:

N/A

Type:
Water	Unknown

Ability:

Torrent

Held item:

Mystic Water

Dewott♂ Lv.20

Razor Shell
Water	Physical

Fury Cutter
Bug	Physical

Water Sport
Water	Status

Focus Energy
Normal	Status

Types:
Normal	Flying

Ability:

Big Pecks

Held item:

None

Pidove♂ Lv.18

Air Cutter
Flying	Special

Leer
Normal	Status

Quick Attack
Normal	Physical

Roost
Flying	Status

If the player chose Oshawott:

^P_K^M_N Trainer

Hugh

Castelia Sewers

Black 2 and White 2

Reward:

N/A

Type:
Grass	Unknown

Ability:

Overgrow

Held item:

Miracle Seed

Servine♂ Lv.20

Leaf Tornado
Grass	Special

Leech Seed
Grass	Status

Growth
Normal	Status

Wrap
Normal	Physical

Types:
Normal	Flying

Ability:

Big Pecks

Held item:

None

Pidove♂ Lv.18

Air Cutter
Flying	Special

Leer
Normal	Status

Quick Attack
Normal	Physical

Roost
Flying	Status

Trainer

Pokémon


	Janitor Felix カンキチ Kankichi Reward: 640

	Lillipup♂	Lv.16
	No item

	Trubbish♂	Lv.16
	No item


	Doctor Heath タイゾウ Taizō Reward: 1020

	Sewaddle♂	Lv.17
	No item


	Worker Zack ザック Zack Reward: 680

	Drilbur♂	Lv.17
	No item


	Team Plasma Grunt Reward: 1280 Double Battle with the following Grunt

	Sandile♂	Lv.16
	No item


	Team Plasma Grunt Reward: 1280 Double Battle with the previous Grunt

	Scraggy♂	Lv.16
	No item

Requires Surf during spring and summer;
normal access during autumn and winter


	Worker Scott スコット Scott Reward: 640

	Timburr♂	Lv.17
	No item

Autumn and winter only


	Scientist Caroline ユウコ Yūko Reward: 816

	Grimer♀	Lv.17
	No item

Spring and summer only (requires Surf)


	Scientist Clarke タカアキ Takaaki Reward: 816

	Magnemite	Lv.17
	No item


	Janitor Brady ムネノリ Munenori Reward: 1240

	Marill♂	Lv.31
	No item

	Cinccino♀	Lv.31
	No item

Layout

Version	Flooded	Dry	Back rooms
Black 2
White 2

In the anime

Castelia Sewers in the anime

The Castelia Sewers appeared in A Venipede Stampede!. While investigating them, Burgh, Ash, and his friends found a Venipede stuck in one of the pipes and helped it, before an entire swarm of Venipede appeared.

Notably, this area appeared in the anime long before it was introduced in the games.

In the manga

Castelia Sewers in Pokémon Adventures

Black 2 & White 2 chapter

The Castelia Sewers were first mentioned in Choir Tournament, where Looker received word from Blake that two of the Seven Sages had been spotted in the sewers of Castelia City.

In Angry Boy, Roxie discovered a man who had been attacked by Team Plasma, who stole his Karrablast and ran off into the sewers. Blake, Whitley, and Hugh each headed into the sewers with Roxie to find the culprits. During an encounter with a group of Team Plasma Grunts, the group got scattered, with Hugh then being found by Looker's Croagunk. Using a Xtransceiver on Croagunk's hat, Looker tried to question Hugh about what he knew about Team Plasma, but Hugh refused to tell him anything. Meanwhile, Whitley managed to rescue the Pokémon stolen by the Team Plasma Grunts with the help of Foongy, while Blake effortlessly captured Bronius and Ryoku before heading out to investigate the source of the cold air coming out of the Relic Passage.

In the TCG

This listing is of cards mentioning or featuring Castelia Sewers in the Pokémon Trading Card Game.

Related cards Cards listed with a blue background are only legal to use in the current Expanded format. Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.
Card	Type	English Expansion	Rarity	#	Japanese Expansion	Rarity	#
Dewott		Legendary Treasures		38/113	EX Battle Boost		030/093

In other languages

Language		Title
Chinese	Cantonese	飛雲地下水道 Fēiwàhn Deihhah Séuidouh
Chinese	Mandarin	飛雲地下水道 Fēiyún Dìxià Shuǐdào * 飛雲下水道 Fēiyún Xiàshuǐdào *
French		Égouts de Volucité
German		Stratos-Kanalisation
Italian		Fogne di Austropoli
Korean		구름하수도 Gureum Hasudo
Polish		Kanały Castelii
Spanish		Cloacas Porcelana
Vietnamese		Cống thoát nước Hiun

Unova

Settlements
Nuvema Town • Accumula Town • Striaton City • Nacrene City • Castelia City • Nimbasa City • Anville Town
Driftveil City • Mistralton City • Icirrus City • Opelucid City • Pokémon League • Lacunosa Town • Undella Town
Black City • White Forest • Aspertia City • Floccesy Town • Virbank City • Lentimas Town • Humilau City

Routes
1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23

Bridges and tunnels
Skyarrow Bridge • Driftveil Drawbridge • Tubeline Bridge • Village Bridge • Marvelous Bridge • Marine Tube

Landmarks
Dreamyard • Wellspring Cave • Pinwheel Forest • Liberty Garden • Desert Resort • Relic Castle • Battle Subway • Lostlorn Forest
Cold Storage • Mistralton Cave • Chargestone Cave • Celestial Tower • Twist Mountain • Dragonspiral Tower • Moor of Icirrus
Challenger's Cave • Victory Road (BW • B2W2) • N's Castle • Royal Unova • Giant Chasm • Undella Bay • Abyssal Ruins
Abundant Shrine • Poké Transfer Lab • P2 Laboratory • Entralink • Unity Tower • Floccesy Ranch • Pledge Grove • Virbank Complex
Pokéstar Studios • Castelia Sewers • Join Avenue • Cave of Being • Pokémon World Tournament • Reversal Mountain • Plasma Frigate
Clay Tunnel • Underground Ruins • Strange House • Relic Passage • Seaside Cave • White Treehollow • Black Tower

Access to
Nature Preserve

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

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