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
Middle Floors
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
- Oran Berry
- Grimy Food
- Grimy Berry
- Stamina Band
- Cleanse Orb
- Recycle Orb
- Trawl Orb
- Mobile Orb
- TM Toxic
Kecleon Shop Items
The Kecleon shop in Caustic Sewers spawns on 28F. Note that in case of a small room the shop may fail to spawn.
| Name | Price |
|---|---|
| Yellow Apple | 250 |
| Max Ether | 250 |
| Oran Berry | 100 |
| Sitrus Berry | 150 |
| Lum Berry | 150 |
| Antidote | 250 |
| Trawl Orb | 350 |
| Smoke Ball | 250 |
| Toxic Orb | 500 |
| Black Sludge | 500 |
| TM Sludge Bomb | 5000 |
| TM Venoshock | 5000 |
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.
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.
