FANDOM


Caustic Sewers

Floors

30

Random

Yes

Weather

No

Boss

Yes

Set Level

No

Secret Room

Yes

Sealed Chamber

25F

Monster House

Yes

Level Range

55 to 70

Caustic Sewers, also known as CS, is a dungeon found in the Tanren Undercity. The green water in this dungeon can poison a water, flying, or levitating Pokémon, so bringing a Pokémon with Refresh will help you throughout this dungeon.

Dungeon Parts

 Scenery

Lower Floors

  • Floors 1-11
    Sewerslow

    Lower Floors 1-11

Middle Floors

  • Floors 11-20
    Sewers

    Middle Floors 11-20 and Upper Floors 21-30

Upper Floors

  • Floors 21-30

Pokémon

The Pokémon here are mostly Poison, Ghost, Dark, and Steel.

Lower Floors(1-10):

These floors are mostly pre-evolved pokémon and mid-evolved pokémon.

  • Koffing
  • Ariados
  • Nidorina
  • Nidorino
  • Golbat
  • Haunter
  • Skorupi
  • Seviper
  • Arbok
  • Bronzor
  • Stunky
  • Raticate
  • Gulpin

Middle Floors(11-20):

A few fully evolved pokémon like Gengar and Weezing. There's still a few pre-evolved and mid-evolved pokémon.

  • Gengar
  • Stunky
  • Weezing
  • Ariados
  • Arbok
  • Nidorina
  • Nidorino
  • Crobat
  • Forretress
  • Raticate
  • Koffing
  • Grimer
  • Muk
  • Seviper
  • Haunter
  • Duosion
  • Venomoth
  • Swalot
  • Garbodor
  • Dustox (Night)

Upper Floors(21-30):

The upper floors have many fully evolved pokémon and you can recruit a Trubbish on these floors at Dusk/Night. Also, you can find Trubbish eggs, but they're rare.

  • Nidorina
  • Nidoqueen
  • Nidoking
  • Bronzor
  • Drapion
  • Swalot
  • Stunky
  • Muk
  • Ariados
  • Garbodor
  • Ferrothorn
  • Trubbish (All times)
  • Weezing
  • Bronzong

Mystery Eggs:

  • Trubbish (Rare)

Items:

  • Relic Copper
  • Relic Silver
  • Relic Gold
  • Ekop
  • Rotten Apple
  • Kebia Berry
  • Grimy Food
  • Grimy Berry
  • Cleanse Orb
  • Recycle Orb
  • Trawl Orb
  • Mobile Orb
  • Oran Berry

Boss

The boss is a resemblance to Team Skull from Explorers of Time/Darkness/Sky, which are Skuntank, Koffing, and Zubat. Skuntank drops 35 Ekops when it's defeated. Koffing and Zubat drop 1 Tiny Mushroom each.

  • Skuntank
  • Koffing
  • Zubat

Dungeon Objective

As with most dungeons, the goal is to complete it and go to Ancient Caustic Sewers. Caustic Sewers is also a location where a Pink Silk may be obtained. This can be accomplished by unlocking the Sealed Chamber on 25F with a Silver Key and having the contents of the box contained appraised.

CSSR

Secret Room:

  • TM Toxic
  • Poison Dust

Ending box:

  • TM Venoshock
  • Full Restore
  • Big Nugget
  • Max Revive
  • Purity Relic

 Tips

Bring a Pokémon with Refresh.

Purity relic/Safeguard/Status immunity gems are recommended.

There is a kecleon shop at 28f

Trivia

Caustic Sewers has one of the highest level ranges out of all the Tanren Undercity dungeons.