Sentimental Aquifer

Sentimental Aquifer (SA) is dungeon northwest of Exbel, below Mt. Skylift. Rock Smash is required to get to the dungeon's entrance. After the final floor is the break point called Aquifer Crystal Passage, which leads to the end room Sentimental Aquifer Depth. One must have a red chain from Lake of Acuity, Lake of Verity, or Lake of Valor to take on the respective trials that lie past that point. The weather here is always clear, as well as containing a Cloud Nine Pokémon.

Attributes

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The last floor leads to Aquifer Crystal Passage, a brief midpoint with a Kangaskhan Storage for the player to retrieve one of the lakes' red chains if they didn't prior, to enter one of the trials in Sentimental Aquifer Depth. Continuing to Sentimental Aquifer Depth will abandon any parties.

Sentimental Aquifer Depth
Sentimental Aquifer Depth is the ending room, containing two warp pads that exit the dungeon and sets of stairs blocked by colored stone. Each of them require that you have the respective red chain from one of the lake dungeons. Each leads to a puzzle room before taking the player to the respective lake guardian as a boss.

Acuity Puzzle Room
Small orange stones block the narrow paths. You must hit switches (appearing as small grey rocks) to make them disappear and go through in time to complete it. The warp tiles in this room all take you back to the beginning of this puzzle room.

Valor Puzzle Room
There's several long corridors, each have a warp at the beginning and end, except for the first and last. To proceed, you must enter the correct warps to enter the following corridor. When at the 4th corridor, go down until last corridor and go up.

Verity Puzzle Room
For the Verity Puzzle Room, there's an invisible path you need to take to proceed. Stepping on a wrong tile warps you back to the entrance of the room. You cannot continue through the left paths, as the ends are false tiles.

Azelf
Azelf is located beyond the Valor Puzzle Room, requiring a Red Chain of Valor. Azelf knows the moves Psychic, Grass Knot, Shadow Ball, and Flamethrower.

Boss drop:
 * Azelf's Heart Slate

Mesprit
Mesprit is located beyond the Verity Puzzle Room, requiring a Red Chain of Verity. Mesprit knows the moves Psychic, Grass Knot, Shadow Ball, and Flamethrower.

Boss drop:
 * Mesprit's Heart Slate

Uxie
Uxie is located beyond the Acuity Puzzle Room, requiring a Red Chain of Acuity. Uxie knows the moves Psychic, Grass Knot, Shadow Ball, and Flamethrower.

Boss drop:
 * Uxie's Heart Slate

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


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Items

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Dungeon Objective
Make it to Aquifer Crystal Passage to attempt the trials. Players may also obtain the Cover Fossil here.

Tips

 * Almost every enemy Pokémon here is weak to the Grass-type, so using Grass-typed moves is a good idea.
 * Watch out for Azumarill though, it has Sap Sipper.

Trivia

 * Sentimental Aquifer was released on the 1st of June in 2018.