Ancient Caustic Sewers

Ancient Caustic Sewers, also known as ACS, is the continuation dungeon of Caustic Sewers. It is void of weather like Caustic Sewers.

Attributes

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The dungeon is light green in color, there's rather heavy darkness and rooms are usually very compact and small. Water continues to poison Pokémon who are not immune or protected from it.

Forgotten Shrine
In the end room there are 2 Deluxe Boxes.

Box items:
 * Purity Relic
 * Poison Dust
 * Full Restore
 * Max Revive
 * Old Gateau
 * Big Nugget
 * TM Sludge Bomb
 * TM Poison Jab
 * TM Venoshock

Secret Room
The Secret Room contains 2 Deluxe Boxes, and it is found on all floors besides the first and last.

Box items:
 * Poison Dust
 * Golden Apple
 * Revive
 * Revival Herb
 * Big Nugget
 * Relic Vase
 * TM Sludge Bomb
 * TM Sludge Wave
 * TM Venoshock

Pokémon
''Pokémon in bold are recruitable. Please visit the Recruitable Pokémon page for more information.''


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Items

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Kecleon Shop Items
There is a Kecleon Shop on Floor 12.


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Mystery Eggs
Ancient Caustic Sewers has Mystery Eggs that can appear on all floors. Mystery Eggs here only contain one Pokémon.


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Dungeon Objective
The main objective of this dungeon is to get to the end. The Purity Relic is exclusive to the end box of this dungeon. Players often come to this dungeon to earn Ekop for the various shops in the Tanren Undercity.

Tips

 * A way to heal or prevent statuses (mainly poison) is recommended.

Trivia

 * This is the highest level dungeon in Tanren Undercity.