Editing Submerged Castle

{{game icons|p2=y}}
{{infobox cave
|image     = Submerged Castle sublevel 4.jpg
|location  = Perplexing Pool
|sublevels = 5
|treasures = 13
|hazards   = {{fire}} {{water}} {{electricity}} {{poison}} {{explosion}}
}}
{{guide}}
The '''Submerged Castle''' ({{j|水中の城|Suichū no Shiro|Underwater Castle}}) is a [[cave]] in the [[Perplexing Pool]] in {{p2}}. Located in a far corner of the area, its entrance is submerged in [[water]], meaning only [[Blue Pikmin]] can enter the cave. The cave contains all 4 elemental [[hazard]]s, making it quite dangerous, though [[Bulbmin]] are found within the cave. The most notable part of the Submerged Castle is its [[boss]]: the [[Waterwraith]]. After 5 minutes are spent in a sublevel, the Waterwraith will drop from the ceiling and start chasing the [[leader]]s and their [[Pikmin family|Pikmin]]. It is capable of [[crush]]ing Pikmin with its rollers, making it extremely dangerous. It is impossible to defeat until the 5th and final sublevel, where [[Violet Candypop Bud]]s allow [[Purple Pikmin]] to be created, which are the boss's only weakness. There are a total of {{pokos|690}} worth of treasures here in the US [[Region|version]] of the game, and {{pokos|620}} in the European and Japanese versions.

==How to reach==
{{location map | width = 272 | height = 428 | image = PP texture.png | bg = #111 | caption = Location of the cave. | icons =
{{map icon | cave | 160 | 48}}
}}

In the river beside the [[Glutton's Kitchen]] is a black gate. Destroying it leads to a large pool, with [[Hermit Crawmad]]s, [[Water Dumple]]s, and a [[Withering Blowhog]]. The cave is nearby, where the [[Chronos Reactor]] puzzle was originally located.

There is little choice in Pikmin squad: only Blue Pikmin are permitted entry. Even if the player utilizes any of a few methods of getting a non-Blue Pikmin to the cave's entrance, the game is programmed specifically to disallow it from entering the cave under any circumstances.{{cite youtube|6o61v2-pWno|demonstrating how to bring other Pikmin, and showing that they still won't enter}} Bringing 60 Blue Pikmin allows all [[Bulbmin]] to be collected, while bringing more Blue Pikmin initially makes earlier floors easier. Those not going for a [[no-death run]] might consider bringing more to serve as a death-buffer.

{{clear}}
{{Notes|ship=y}}

==Waterwraith==
{{main|Waterwraith}}
On sublevels 1-4, the Waterwraith will appear after being in the sublevel for five minutes. A few key points to remember about the Waterwraith are:

#It will steam around the level on two stone rollers, which will [[crush]] and kill any Pikmin in the way, but will also kill most enemies and disable traps. Try to use this to your advantage.
#It will not go into small corners or spaces, so you can hide there.
#The best way to deal with it is to quickly snag all of the treasures and leave the sublevel before it appears. This means that you must NOT waste any time, so only focus on the treasures. Ignore enemies whenever possible and don't bother bringing back their carcasses.
#The Waterwraith is very, very deadly to your Pikmin, so it is vital that your Pikmin stay out of its way. If you are careless, you could lose every one of your Pikmin.
#It follows your active leader, so watch out. However, you can exploit this by splitting up Olimar and Louie and using one (without any Pikmin) to bait it while the other does the main tasks.
#There is absolutely no way to harm it before sublevel 5, so don't bother trying.
#Move quickly and collect as many treasures as you can. Remember, if you forget to get a treasure or can't get it in time, you can always return to the cave and get it later, though the Waterwraith will also return.
#It's not recommended to bring 100 Blue Pikmin, as that will prevent Bulbmin from spawning which are useful for destroying hazards and elemental enemies.

==Sublevel 1==
* '''Theme''': Concrete
* '''Music''': ''[[Music in Pikmin 2#Submerged Castle|Submerged Castle]]''; ''[[Music in Pikmin 2#Waterwraith|Waterwraith]]'' (after the Waterwraith appears)
* '''Treasures''':
** {{icon|Bug Bait|y}} (inside Fiery Bulblax)
** {{icon|Diet Doomer|y}}
** {{icon|Pastry Wheel|y}}
* '''Enemies''':
** {{icon|Fiery Blowhog|y}} &times; 2
** {{icon|Fiery Bulblax|y}} &times; 1
** {{icon|Mitite|y}} (group of 10) &times; indefinite amount (from eggs)
** {{icon|Waterwraith|y}} &times; 1
* '''Obstacles''':
** {{icon|Fire geyser|y}} &times; 7
* '''Vegetation''':
** {{icon|Fiddlehead|y}} &times; 9
* '''Others''':
** {{icon|Egg|y}} &times; 1 or more

You have likely already taken note that this sublevel contains many fire hazards; keep in mind that this cave is possible to complete. To kill the [[Fiery Blowhog]], [[swarm]] it and blow your whistle when it shakes, then swarm it again until it is defeated.

Now to killing the [[Fiery Bulblax]]. You should first find the Bulblax; once you do, [[throw]] a Pikmin onto its body or [[punch]] it. Blow your whistle once the Pikmin touches the flaming body so it doesn't die but the Bulblax wakes up. Lead it into a nearby pool of water, and the second its flames are put out, use an [[ultra-bitter spray]] to keep it there. Once it dies, the [[Bug Bait]] will appear.

Search for the other two treasures; the Diet Doomer is usually in the open, as is the Pastry Wheel. Look for the hole and leave. There is also a geyser on this floor, allowing you to escape after having found all treasures. However, there is little sense to doing so, as the level is usually cleared before the Waterwraith appears.

{{cavegen|smc1}}
{{sublevel technical
|cave        = yakushima_4
|enemymax    = 10
|itemmax     = 2
|gatemax     = 0
|capmax      = 50
|rooms       = 3
|ctrratio    = 0
|geyser      = Yes
|unitfile    = 2_units_gw_l_conc.txt
|lightfile   = suityu_light_lv0.ini
|bg          =
|clog        = No
|hiddenfloor = 0
|units       =
{{sublevel units
|item_cap_conc|Dead end with item
|way3_conc|Three-way crossing
|way4_conc|Four-way crossing
|wayl_conc|Turning corridor
|way2_conc|Corridor
|way2x2_conc|Long corridor
}}
{{sublevel units
|room_4x4g_water_4_conc|'''Room with 4 exits and 2 walls'''
|room_north4x4l_1_conc|'''Room with a dead end after U-turn'''
}}
}}
{| class="wikitable mw-collapsible mw-collapsed technicaltable"
! colspan="5" style="width: 288px;" | {{tt|Detailed object list|This is a representation of the data in the cave's file, and how the game makes use of it.}}
|-
! colspan="5" | The game spawns these "main" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 1
| {{icon|Waterwraith|y}}
| 1
| None
| "Hard" enemy spots
|-
| -
| {{icon|Professional Noisemaker|y}}
| colspan="3" | Carried inside entry with ID 1<ref group="Noisemaker note" name="pnn">The sublevel's data specifies that the Waterwraith is carrying the Professional Noisemaker in sublevels 1 to 4, even though it cannot normally be obtained in those sublevels. By using external tools to somehow damage and defeat the Waterwraith in one of these sublevels, it will not appear in any following sublevel. In addition, the [[Treasure Gauge]] won't detect this treasure, and will shut off if all the other treasures in the sublevel are collected.</ref>
|-
| 2
| {{icon|Fiery Bulblax|y}}
| 1
| None
| "Hard" enemy spots
|-
| -
| {{icon|Bug Bait|y}}
| colspan="3" | Carried inside entry with ID 2
|-
| 3
| {{icon|Fiery Blowhog|y}}
| 1
| None
| "Hard" enemy spots
|-
| 4
| {{icon|Fire geyser|y}}
| 1
| None
| "Easy" enemy spots
|-
| 5
| {{icon|Fire geyser|y}}
| 1
| None
| "Easy" enemy spots
|-
| 6
| {{icon|Fire geyser|y}}
| 1
| None
| "Easy" enemy spots
|-
| 7
| {{icon|Fire geyser|y}}
| 4
| None
| Cave unit seams
|-
! colspan="5" | Then it spawns these "decoration" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 8
| {{icon|Fiddlehead|y}}
| 9
| None
| Plant spots
|-
! colspan="5" | Then it spawns these "treasure" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 9
| {{icon|Pastry Wheel|y}}
| 1
| None
| Treasure spots
|-
| 10
| {{icon|Diet Doomer|y}}
| 1
| None
| Treasure spots
|-
! colspan="5" | Then it spawns these "dead end" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 11
| {{icon|Egg|y}}
| 1
| None
| Dead ends
|-
| 12
| {{icon|Fiery Blowhog|y}}
| 1
| Falls from the sky
| Dead ends
|-
! colspan="5" | Then it spawns "dead end" objects in as many dead ends as it can. Chances:
|-
! ID !! Object !! Chance !! Fall method !! Spawn location
|-
| 11
| {{icon|Egg|y}}
| 100%
| None
| Dead ends
|}
:''For details on how objects are spawned, and how some may fail to spawn, see [[Pikmin 2 cave generation|here]].''

==Sublevel 2==
* '''Theme''': Concrete
* '''Music''': ''[[Music in Pikmin 2#Submerged Castle|Submerged Castle]]''; ''[[Music in Pikmin 2#Waterwraith|Waterwraith]]'' (after the Waterwraith appears)
* '''Treasures''':
** {{icon|Chocolate Cushion|y}}
** {{icon|Comfort Cookie|y}} (inside Bulbmin)
** {{icon|Confection Hoop|y}}
* '''Enemies''':
** {{icon|Bulbmin|y}} &times; 1
** {{icon|Careening Dirigibug|y}} &times; 1
** {{icon|Dwarf Orange Bulborb|y}} &times; 3
** {{icon|Fiery Dweevil|y}} &times; 4
** {{icon|Waterwraith|y}} &times; 1
* '''Obstacles''':
** None
* '''Vegetation''':
** {{icon|Fiddlehead|y}} &times; 9
* '''Others''':
** [[Gate]] with 12,000 [[Health|HP]] &times; 2

This area contains [[Careening Dirigibug]]s, [[Fiery Dweevil]]s and [[Bulbmin]]. To ensure safety, kill the Careening Dirigibug by throwing Pikmin at it and then [[Group move|swarming]] when it falls to the ground. For the Fiery Dweevils, ignore them unless they grab a treasure you are carrying, in which case use the leader's punches to kill it.

The Fiery Dweevils are usually in an open, rusty pipe that is near the entrance of a long pipe. They are likely to leave this space to pick up objects Pikmin are carrying past them, so it is advised to travel with any Pikmin carrying treasure or corpses in that area. Look around for that pipe entrance and walk inside (the [[Waterwraith]] cannot enter this area). Follow the pipe to a slide-like passageway, where you will go down quickly and fall out, landing near the Chocolate Cushion.

Once that part of the level is complete, you can find the Bulbmin. The parent can be killed by getting close, and then throwing Pikmin onto its back. If you were to swarm it, the adult Bulbmin would most likely get a few mouthfuls of Pikmin. Once they see their leader is dead, the smaller Bulbmin will panic and begin running around; blow your whistle to gain control of them. The game decides the amount of Bulbmin at the beginning of the sublevel depending on your Pikmin amount. The Comfort Cookie will come out of the parent Bulbmin once it is defeated.

Finally, the [[Dwarf Orange Bulborb]]s can be killed by just swarming them the old-fashioned way. The final treasure, the Confection Hoop can be found on a ledge guarded by some Dwarf Orange Bulborbs. To get there, walk to the opposite ledge and throw Pikmin over the gap and to the treasure. Throw more Pikmin over, since it is surrounded by the Bulborbs.

The exit is [[Clog|sealed]], so you will have to use Pikmin to smash the rock and open the cave to the next sublevel. One strategy is to destroy the clog before the rest of the cave, so you can leave as soon as the Waterwraith shows up. Getting the treasure back to the Research Pod takes some effort because the Waterwraith is always coming down a small aisle that you have to walk through; do your best to try to avoid it and eventually it will go away. Get the treasure back to your ship and continue on down.

{{cavegen|smc2}}
{{sublevel technical
|cave        = yakushima_4
|enemymax    = 10
|itemmax     = 2
|gatemax     = 2
|capmax      = 0
|rooms       = 3
|ctrratio    = 0
|geyser      = No
|unitfile    = 3_units_h_k_pypes_conc.txt
|lightfile   = suityu_light_lv1.ini
|bg          =
|clog        = Yes
|hiddenfloor = 0
|units       =
{{sublevel units
|item_cap_conc|Dead end with item
|way3_conc|Three-way crossing
|way4_conc|Four-way crossing
|wayl_conc|Turning corridor
|way2_conc|Corridor
|way2x2_conc|Long corridor
}}
{{sublevel units
|room_pype10x18s_conc|'''Huge room with waterway and pipes'''
|room_dan4x4h_2_conc|'''Room with raised portion'''
|room_north4x4k_1_conc|'''Room with pipe and a depression'''
}}
}}
{| class="wikitable mw-collapsible mw-collapsed technicaltable"
! colspan="5" style="width: 288px;" | {{tt|Detailed object list|This is a representation of the data in the cave's file, and how the game makes use of it.}}
|-
! colspan="5" | The game spawns these "main" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 1
| {{icon|Waterwraith|y}}
| 1
| None
| "Hard" enemy spots
|-
| -
| {{icon|Professional Noisemaker|y}}
| colspan="3" | Carried inside entry with ID 1<ref group="Noisemaker note" name="pnn"/>
|-
| 2
| {{icon|Careening Dirigibug|y}}
| 1
| None
| "Hard" enemy spots
|-
| 3
| {{icon|Bulbmin|y}}
| 1
| None
| "Hard" enemy spots
|-
| -
| {{icon|Comfort Cookie|y}}
| colspan="3" | Carried inside entry with ID 3
|-
| 4
| {{icon|Dwarf Orange Bulborb|y}}
| 2
| None
| "Easy" enemy spots
|-
| 5
| {{icon|Dwarf Orange Bulborb|y}}
| 1
| None
| "Easy" enemy spots
|-
| 6
| {{icon|Fiery Dweevil|y}}
| 3
| None
| "Special" enemy spots
|-
| 7
| {{icon|Fiery Dweevil|y}}
| 1
| Falls when Pikmin are carrying nearby
| "Hard" enemy spots
|-
! colspan="5" | Then it spawns these "decoration" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 8
| {{icon|Fiddlehead|y}}
| 9
| None
| Plant spots
|-
! colspan="5" | Then it spawns these "treasure" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 9
| {{icon|Chocolate Cushion|y}}
| 1
| None
| Treasure spots
|-
| 10
| {{icon|Confection Hoop|y}}
| 1
| None
| Treasure spots
|-
! colspan="5" | Then it spawns 2 "gate" objects. Chances:
|-
! ID !! Object !! Chance !! Fall method !! Spawn location
|-
| 11
| [[Gate]] {{tt|(4,000 [[Health|HP]])|12,000 HP in practice. Gate HP in ''Pikmin 2'' is calculated per-segment, effectively meaning all gates have 3 times the HP they're listed as having internally.}}
| 100%
| None
| Gate spots
|}
:''For details on how objects are spawned, and how some may fail to spawn, see [[Pikmin 2 cave generation|here]].''

==Sublevel 3==
* '''Theme''': Concrete
* '''Music''': ''[[Music in Pikmin 2#Submerged Castle|Submerged Castle]]''; ''[[Music in Pikmin 2#Waterwraith|Waterwraith]]'' (after the Waterwraith appears)
* '''Treasures''':
** {{icon|Activity Arouser|y|v=US}} (US) / {{icon|Pondering Emblem|y|v=EU}} (Europe) / {{icon|Anywhere Floater|y}} (Japan) (inside Withering Blowhog in all regions)
** {{icon|Compelling Cookie|y}}
** {{icon|Succulent Mattress|y}}
* '''Enemies''':
** {{icon|Anode Beetle|y}} &times; 4
** {{icon|Anode Dweevil|y}} &times; 3
** {{icon|Bulbmin|y}} &times; 1
** {{icon|Mitite|y}} (group of 10) &times; indefinite amount (from eggs)
** {{icon|Waterwraith|y}} &times; 1
** {{icon|Withering Blowhog|y}} &times; 2
** {{icon|Wollyhop|y}} &times; 1
* '''Obstacles''':
** {{icon|Electrical wire|y}} &times; 5
* '''Vegetation''':
** {{icon|Fiddlehead|y}} &times; 9
** {{icon|Ivory Candypop Bud|y}} &times; 1
* '''Others''':
** [[Gate]] with 12,000 [[Health|HP]] &times; 3
** {{icon|Egg|y}} &times; 1 or more

This level contains electrical hazards, so take caution. [[Group move|Swarm]] the electrical wires the very second they turn off. If you have Bulbmin, let them work on it instead. The [[Withering Blowhog]] is killed the same way as always: throw Pikmin and Bulbmin on it. The Withering Blowhog holds the Activity Arouser, but the Bulbmin holds nothing. For Anode Dweevils, just throw Bulbmin on them, as Bulbmin are immune to all hazards. Defeat the [[Wollyhop]] in the same way as you would a Yellow Wollyhop.

To end this short sublevel, take note that the last two treasures, the Succulent Mattress and the Compelling Cookie can be anywhere in the open, usually behind a gate. The [[Waterwraith]] will likely have appeared by this time, so try to ignore and break the exit, which is yet again covered in rocks.

There is an [[Ivory Candypop Bud]] in one of the alcoves on this floor, but it is best ignored. There are no completely buried treasures that only a [[White Pikmin]] can see, Bulbmin can handle any poison hazards, and there are so many puddles around that any Pikmin unable to swim will be a liability when simply trying to move about.

Note: Avoid swarming the electrical wires while a treasure is about to be delivered, as you won't be able to control your leader or Pikmin.

{{cavegen|smc3}}
{{sublevel technical
|cave        = yakushima_4
|enemymax    = 15
|itemmax     = 2
|gatemax     = 3
|capmax      = 50
|rooms       = 4
|ctrratio    = 0.2
|geyser      = No
|unitfile    = 3_units_f_g_m_conc.txt
|lightfile   = suityu_light_lv2.ini
|bg          =
|clog        = Yes
|hiddenfloor = 0
|units       =
{{sublevel units
|item_cap_conc|Dead end with item
|way3_conc|Three-way crossing
|way4_conc|Four-way crossing
|wayl_conc|Turning corridor
|way2_conc|Corridor
|way2x2_conc|Long corridor
}}
{{sublevel units
|room_4x4f_4_conc|'''Room with 4 exits and raised ledge'''
|room_4x4g_4_conc|'''Room with 4 exits and 2 walls'''
|room_hitode3x3m_5_conc|'''Room with 5 exits and 2 walls'''
}}
}}
{| class="wikitable mw-collapsible mw-collapsed technicaltable"
! colspan="5" style="width: 288px;" | {{tt|Detailed object list|This is a representation of the data in the cave's file, and how the game makes use of it.}}
|-
! colspan="5" | The game spawns these "main" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 1
| {{icon|Waterwraith|y}}
| 1
| None
| "Hard" enemy spots
|-
| -
| {{icon|Professional Noisemaker|y}}
| colspan="3" | Carried inside entry with ID 1<ref group="Noisemaker note" name="pnn"/>
|-
| 2
| {{icon|Withering Blowhog|y}}
| 1
| None
| "Hard" enemy spots
|-
| -
| {{icon|Activity Arouser|y|v=US}} (US)<br>{{icon|Pondering Emblem|y|v=EU}} (EU)<br>{{icon|Anywhere Floater|y}} (JP)
| colspan="3" | Carried inside entry with ID 2
|-
| 3
| {{icon|Bulbmin|y}}
| 1
| None
| "Hard" enemy spots
|-
| 4
| {{icon|Wollyhop|y}}
| 1
| None
| "Hard" enemy spots
|-
| 5
| {{icon|Anode Dweevil|y}}
| 2
| None
| "Hard" enemy spots
|-
| 6
| {{icon|Anode Beetle|y}}
| 2
| None
| "Easy" enemy spots
|-
| 7
| {{icon|Anode Beetle|y}}
| 2
| None
| "Easy" enemy spots
|-
| 8
| {{icon|Electrical wire|y}}
| 5
| None
| Cave unit seams
|-
! colspan="5" | Then it spawns these "decoration" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 9
| {{icon|Fiddlehead|y}}
| 9
| None
| Plant spots
|-
! colspan="5" | Then it spawns these "treasure" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 10
| {{icon|Compelling Cookie|y}}
| 1
| None
| Treasure spots
|-
| 11
| {{icon|Succulent Mattress|y}}
| 1
| None
| Treasure spots
|-
! colspan="5" | Then it spawns these "dead end" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 13
| {{icon|Ivory Candypop Bud|y}}
| 1
| None
| Dead ends
|-
| 14
| {{icon|Egg|y}}
| 1
| None
| Dead ends
|-
| 15
| {{icon|Withering Blowhog|y}}
| 1
| Falls from the sky
| Dead ends
|-
| 16
| {{icon|Anode Dweevil|y}}
| 1
| Falls from the sky
| Dead ends
|-
! colspan="5" | Then it spawns "dead end" objects in as many dead ends as it can. Chances:
|-
! ID !! Object !! Chance !! Fall method !! Spawn location
|-
| 14
| {{icon|Egg|y}}
| 100%
| None
| Dead ends
|-
! colspan="5" | Then it spawns 3 "gate" objects. Chances:
|-
! ID !! Object !! Chance !! Fall method !! Spawn location
|-
| 12
| [[Gate]] {{tt|(4,000 [[Health|HP]])|12,000 HP in practice. Gate HP in ''Pikmin 2'' is calculated per-segment, effectively meaning all gates have 3 times the HP they're listed as having internally.}}
| 100%
| None
| Gate spots
|}
:''For details on how objects are spawned, and how some may fail to spawn, see [[Pikmin 2 cave generation|here]].''

==Sublevel 4==
* '''Theme''': Concrete
* '''Music''': ''[[Music in Pikmin 2#Submerged Castle|Submerged Castle]]''; ''[[Music in Pikmin 2#Waterwraith|Waterwraith]]'' (after the Waterwraith appears)
* '''Treasures''':
** {{icon|Drone Supplies|y|v=US}} (US) / {{icon|Open Archive|y}} (partially buried) (Europe/Japan) 
** {{icon|Pale Passion|y}} (inside Iridescent Glint Beetle)
** {{icon|Proton AA|y}} (US/Europe) / {{icon|Proton X|y}} (Japan)
* '''Enemies''':
** {{icon|Bulbmin|y}} &times; 2
** {{icon|Careening Dirigibug|y}} &times; 2
** {{icon|Iridescent Glint Beetle|y}} &times; 1
** {{icon|Mitite|y}} (group of 10) &times; indefinite amount (from eggs)
** {{icon|Volatile Dweevil|y}} &times; 5
** {{icon|Waterwraith|y}} &times; 1
* '''Obstacles''':
** {{icon|Bomb-rock|y}} &times; 11
** {{icon|Poison emitter|v=P2|y}} &times; 3
* '''Vegetation''':
** {{icon|Fiddlehead|y}} &times; 9
* '''Others''':
** [[Gate]] with 12,000 [[Health|HP]] &times; 4
** {{icon|Egg|y}} &times; 1 or more

This floor is difficult due to the [[bomb-rock]]s and [[Volatile Dweevil]]s that fall from the ceiling, and the Careening Digiribugs. Take careful steps here, and search for the Drone Supplies and the Proton AA.

There is an [[Iridescent Glint Beetle]] running around the place. Throw a Pikmin at it to make it to drop the Pale Passion. In order to make the path safer for your Pikmin, quickly run through the area with a single leader and detonate all the bomb-rocks and Volatile Dweevils. Finish by breaking the hole and then diving on down to the final floor.

As a side note, it is possible for the Waterwraith to get stuck in one of the corners of this sublevel, making collecting everything a breeze, although the creature will still follow you to the next sublevel once you go in. Also to note is that, due to the way sublevel generation works, the [[Iridescent Glint Beetle]] of this sublevel may not appear, and by extension, the Pale Passion, as detailed [[Pikmin 2 cave generation|here]] and [[Mistake#Missing sublevel objects|here]].

{{cavegen|smc4}}
{{sublevel technical
|cave        = yakushima_4
|enemymax    = 25
|itemmax     = 2
|gatemax     = 4
|capmax      = 50
|rooms       = 4
|ctrratio    = 0.2
|geyser      = No
|unitfile    = 4_units_d_j_n_o_conc.txt
|lightfile   = suityu_light_lv3.ini
|bg          =
|clog        = Yes
|hiddenfloor = 0
|units       =
{{sublevel units
|item_cap_conc|Dead end with item
|way3_conc|Three-way crossing
|way4_conc|Four-way crossing
|wayl_conc|Turning corridor
|way2_conc|Corridor
|way2x2_conc|Long corridor
}}
{{sublevel units
|item_cap_pipe|Dead end with item
|wayl_pipe|Turning corridor
|way2x2_pipe|Long corridor
|room_4x4d_4_conc|'''Room with 4 exits'''
|room_north4x4j_1_conc|'''Room with 1 exit and a pipe'''
|room_pype3x4n_2_conc|'''Room with 2 exits and a pipe'''
}}
{{sublevel units
|room_pype4x4o_3_conc|'''Room with 3 exits and a pipe'''
}}
}}
{| class="wikitable mw-collapsible mw-collapsed technicaltable"
! colspan="5" style="width: 288px;" | {{tt|Detailed object list|This is a representation of the data in the cave's file, and how the game makes use of it.}}
|-
! colspan="5" | The game spawns these "main" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 1
| {{icon|Waterwraith|y}}
| 1
| None
| "Hard" enemy spots
|-
| -
| {{icon|Professional Noisemaker|y}}
| colspan="3" | Carried inside entry with ID 1<ref group="Noisemaker note" name="pnn"/>
|-
| 2
| {{icon|Volatile Dweevil|y}}
| 5
| Falls from the sky
| "Hard" enemy spots
|-
| 3
| {{icon|Careening Dirigibug|y}}
| 2
| Falls from the sky
| "Hard" enemy spots
|-
| 4
| {{icon|Bomb-rock|y}}
| 3
| Falls from the sky
| "Hard" enemy spots
|-
| 5
| {{icon|Bomb-rock|y}}
| 3
| Falls from the sky
| "Easy" enemy spots
|-
| 6
| {{icon|Bulbmin|y}}
| 2
| None
| "Hard" enemy spots
|-
| 7
| {{icon|Iridescent Glint Beetle|y}}
| 1
| None
| "Hard" enemy spots
|-
| -
| {{icon|Pale Passion|y}}
| colspan="3" | Carried inside entry with ID 7
|-
| 8
| {{icon|Poison emitter|v=P2|y}}
| 3
| None
| Cave unit seams
|-
! colspan="5" | Alongside it spawns 5 "main" objects. Chances:
|-
! ID !! Object !! Chance !! Fall method !! Spawn location
|-
| 4
| {{icon|Bomb-rock|y}}
| 50%
| Falls from the sky
| "Hard" enemy spots
|-
| 5
| {{icon|Bomb-rock|y}}
| 50%
| Falls from the sky
| "Easy" enemy spots
|-
! colspan="5" | Then it spawns these "decoration" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 9
| {{icon|Fiddlehead|y}}
| 9
| None
| Plant spots
|-
! colspan="5" | Then it spawns these "treasure" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 10
| {{icon|Drone Supplies|y|v=US}} (US)<br>{{icon|Open Archive|y}} (EU/JP)
| 1
| None
| Treasure spots
|-
| 11
| {{icon|Proton AA|y}} (US/EU)<br>{{icon|Proton X|y}} (JP)
| 1
| None
| Treasure spots
|-
! colspan="5" | Then it spawns these "dead end" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 13
| {{icon|Egg|y}}
| 1
| None
| Dead ends
|-
! colspan="5" | Then it spawns "dead end" objects in as many dead ends as it can. Chances:
|-
! ID !! Object !! Chance !! Fall method !! Spawn location
|-
| 13
| {{icon|Egg|y}}
| 100%
| None
| Dead ends
|-
! colspan="5" | Then it spawns 4 "gate" objects. Chances:
|-
! ID !! Object !! Chance !! Fall method !! Spawn location
|-
| 12
| [[Gate]] {{tt|(4,000 [[Health|HP]])|12,000 HP in practice. Gate HP in ''Pikmin 2'' is calculated per-segment, effectively meaning all gates have 3 times the HP they're listed as having internally.}}
| 100%
| None
| Gate spots
|}
<references group="Noisemaker note"/>
:''For details on how objects are spawned, and how some may fail to spawn, see [[Pikmin 2 cave generation|here]].''

==Sublevel 5==
* '''Theme''': Concrete
* '''Music''': ''[[Music in Pikmin 2#Common boss battle|Boss]]'' (only when combating); ''[[Music in Pikmin 2#Waterwraith|Waterwraith vulnerable]]'' (when the Waterwraith is halfway defeated)
* '''Treasures''':
** {{icon|Professional Noisemaker|y}} (inside Waterwraith)
* '''Enemies''':
** {{icon|Mitite|y}} (group of 10) &times; 0 - 3 (from eggs)
** {{icon|Waterwraith|y}} &times; 1
* '''Obstacles''':
** None
* '''Vegetation''':
** {{icon|Fiddlehead|y}} &times; 3
** {{icon|Figwort|y}} (small brown) &times; 3
** {{icon|Violet Candypop Bud|y}} &times; 2
* '''Others''':
** [[Gate]] with 300 [[Health|HP]] &times; 4
** {{icon|Egg|y}} &times; 3
{{see also|Waterwraith#Strategy|t1=Waterwraith strategy}}

Here, the Waterwraith will only appear in the arena after you enter. You should have plenty of Bulbmin by this point. Start out by smashing the three gates in the starting area. Since you can't take them with you, use your Bulbmin to produce ten [[Purple Pikmin]] from the two [[Violet Candypop Bud]]s. Now, smash the three [[egg]]s and use the nectar to give your Pikmin flowers. Then smash the final black gate that blocks access to the boss arena.

Follow the strategy linked above. Once defeated, the Waterwraith will drop the Professional Noisemaker. This gives you a device called the [[Pluckaphone]], which allows you to [[pluck]] Pikmin sprouts from the ground just by whistling at them.

{{cavegen|smc5}}
{{sublevel technical
|cave        = yakushima_4
|enemymax    = 4
|itemmax     = 0
|gatemax     = 4
|capmax      = 0
|rooms       = 2
|ctrratio    = 0
|geyser      = Yes
|unitfile    = 1_units_manh_boss_conc.txt
|lightfile   = normal_light_lv4.ini
|bg          =
|clog        = No
|hiddenfloor = 0
|units       =
{{sublevel units
|item_cap_conc|Dead end with item
|way3_conc|Three-way crossing
|way4_conc|Four-way crossing
|wayl_conc|Turning corridor
|way2_conc|Corridor
|way2x2_conc|Long corridor
}}
{{sublevel units
|room_manh_boss_conc|'''Circular room with 1 exit'''
|room_4x4d_4_conc|'''Room with 4 exits'''
}}
}}
{| class="wikitable mw-collapsible mw-collapsed technicaltable"
! colspan="5" style="width: 288px;" | {{tt|Detailed object list|This is a representation of the data in the cave's file, and how the game makes use of it.}}
|-
! colspan="5" | The game spawns these "main" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 1
| {{icon|Waterwraith|y}}
| 1
| None
| "Special" enemy spots
|-
| -
| {{icon|Professional Noisemaker|y}}
| colspan="3" | Carried inside entry with ID 1
|-
| 2
| {{icon|Egg|y}}
| 3
| None
| "Hard" enemy spots
|-
! colspan="5" | Then it spawns these "decoration" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 3
| {{icon|Figwort|y}} (small brown)
| 3
| None
| Plant spots
|-
| 4
| {{icon|Fiddlehead|y}}
| 3
| None
| Plant spots
|-
! colspan="5" | Then it spawns these "dead end" objects:
|-
! ID !! Object !! Amount !! Fall method !! Spawn location
|-
| 6
| {{icon|Violet Candypop Bud|y}}
| 2
| None
| Dead ends
|-
! colspan="5" | Then it spawns 4 "gate" objects. Chances:
|-
! ID !! Object !! Chance !! Fall method !! Spawn location
|-
| 5
| [[Gate]] {{tt|(100 [[Health|HP]])|300 HP in practice. Gate HP in ''Pikmin 2'' is calculated per-segment, effectively meaning all gates have 3 times the HP they're listed as having internally.}}
| 100%
| None
| Gate spots
|}
:''For details on how objects are spawned, and how some may fail to spawn, see [[Pikmin 2 cave generation|here]].''

==Gallery==
{{image}}
<gallery>
Submerged Castle Location.png|The cave entrance.
Submerged Castle P2 unused.png|An earlier, [[Unused content in Pikmin 2|unused]] variant of the Submerged Castle.
</gallery>

==Trivia==
*The cavern contains 13 treasures, a famously unlucky number; this appears to be intended to reflect the cave's nature, and especially that of its boss.
*An earlier version of the game's English script reveals that this cave was originally intended to be called "The Submarine Castle".{{cite web|http://tcrf.net/Pikmin_2/Early_English_Script|Pikmin 2/Early English Script|The Cutting Room Floor}}
*The Waterwraith is actually programmed to drop the [[Professional Noisemaker]] in all sublevels, not just the final one. By using external tools to somehow damage and defeat the Waterwraith in one of these sublevels, it will not appear in any following sublevel.{{cite youtube|rqMG5fcwT9Y|showing the Waterwraith being defeated in an earlier sublevel and preventing its appearance in the last sublevel.|s=42}}
*The cave's file contains a timer for the Waterwraith to appear after 15 seconds on the final sublevel, but it remains unused in favor of having the creature spawn when the arena is entered.
*Internally, all caves use a "BgmList" to determine what song is loaded on each sublevel. Curiously, all five sublevels of the Submerged Castle are specified to use <code>new_01_0.cnd</code> (in the final game, this song is the [[Music in Pikmin 2#Flooded Stump|exclusive theme]] heard on the 6th sublevel of the [[Hole of Heroes]]). Despite that, the Submerged Castle's normal theme <code>kuro_pre.bms</code> is hard-coded to play instead. One possible explanation is that the Submerged Castle's eerie theme originally occupied <code>new_01_0.cnd</code>, until the unique and late addition of the Waterwraith's chase theme necessitated restructuring and the song having to be moved to a new file.

==Names in other languages==
{{Foreignname
|Jap=水中の城
|JapR=Suichū no Shiro
|JapM=Underwater Castle
|SpaA=Castillo Sumergido
|SpaAM=Submerged Castle
|Fra=Fort Submergé
|FraM=Submerged Fort
|Ita=Castello Immerso
|ItaM=Immersed Castle
|Ger=Versunkene Burg
|GerM=Sunken Castle
|Kor=물속의 성
|KorR=Mulsog-ui Seong
|KorM=Underwater Castle
|ChiTrad=水中之城
}}

==See also==
*[[Engulfed Castle]]
*[[Formidable Oak]]
*[[Waterwraith]]

==References==
{{refs}}

{{Perplexing Pool}}
{{p2 caves}}
[[Category:Submerged Castle| ]]