View source for Area Zero Underdepths

{{Infobox location
|image=Area Zero Underdepths.png
|type=land
|location_name=Area Zero Underdepths
|japanese_name=ゼロの大空洞
|translated_name=Great Zero Hollow
|location=[[Great Crater of Paldea]]
|region=Paldea
|generation={{gen|IX}}
|mapsize=300px
|map=Paldea Great Crater of Paldea Map.png
}}

The '''Area Zero Underdepths''' (Japanese: '''ゼロの大空洞''' ''Great Zero Hollow'') is an area located within the [[Great Crater of Paldea]] at the center of the [[Paldea]] [[region]].

==Geography==
The Area Zero Underdepths is a large cavern, roughly 3,300 feet below the surface, located beneath [[Area Zero]]. It is only accessible via the elevator in the [[Zero Lab]] by using the [[Indigo Disk]].

The Underdepths formed approximately two million years ago. It experienced numerous cave-ins in the past, likely due to erosion and tectonic activity, but has remained stable since the last major cave-in.

The Area Zero Underdepths consist of several large chambers connected by tunnels. It is filled with large Terastal crystals, similar to those found at the bottom of Area Zero. These crystals increase with depth until the deepest tunnel is made from solid crystal. Also near the bottom of the Underdepths is a subterranean lake. On an island in this lake is a large tree, seemingly covered in or made from crystal. 

Several Pokémon species also inhabit the Underdepths along with Terapagos, primarily Rock- or Ground-type Pokémon.

==Items==
* [[Star Piece]]
* [[Hard Stone]]
* [[Stardust]]

==Pokémon==
{{Incomplete|section|Complete list of Pokémon encountered and table}}
*{{p|Carbink}}
*{{p|Glimmora}}
*{{p|Glimmet}}

==Special encounters==
===Mandatory Stellar Tera Pokémon===
A variety of {{t|Stellar}} Tera Pokémon must be defeated in order to shrink the crystals blocking the way during the events of [[The Indigo Disk]], allowing the player, [[Carmine]], [[Kieran]], and [[Briar]] to progress further into the Underdepths. None of them can be {{pkmn2|caught}}, and are coded to never be {{Shiny}}.
<div style="display:inline-block">
<p style="text-align:center; font-weight:bold;">Scarlet and Violet</p>
{{Pokémon/9
|ndex=970
|pokemon=Glimmora
|gender=male
|level=78
|tera=Stellar
|type1=Rock
|type2=Poison
|ability=Toxic Debris
|move1=Rock Slide|move1type=Rock|move1cat=Physical
|move2=Power Gem|move2type=Rock|move2cat=Special
|move3=Acid Armor|move3type=Poison|move3cat=Status
|move4=Sludge Wave|move4type=Poison|move4cat=Special}}
</div>
<div style="display:inline-block">
<p style="text-align:center; font-weight:bold;">Scarlet and Violet</p>
{{Pokémon/9
|ndex=715
|pokemon=Noivern
|gender=male
|level=78
|tera=Stellar
|type1=Flying
|type2=Dragon
|ability=Frisk
|move1=Roost|move1type=Flying|move1cat=Status
|move2=Tailwind|move2type=Flying|move2cat=Status
|move3=Hurricane|move3type=Flying|move3cat=Special
|move4=Boomburst|move4type=Normal|move4cat=Special}}
</div>
<div style="display:inline-block">
<p style="text-align:center; font-weight:bold;">Scarlet</p>
{{Pokémon/9
|ndex=989
|pokemon=Sandy Shocks
|level=79
|tera=Stellar
|type1=Electric
|type2=Ground
|ability=Protosynthesis
|move1=Discharge|move1type=Electric|move1cat=Special
|move2=Earth Power|move2type=Ground|move2cat=Special
|move3=Mirror Coat|move3type=Psychic|move3cat=Special
|move4=Gravity|move4type=Psychic|move4cat=Status}}
</div>
<div style="display:inline-block">
<p style="text-align:center; font-weight:bold;">Violet</p>
{{Pokémon/9
|ndex=995
|pokemon=Iron Thorns
|level=79
|tera=Stellar
|type1=Rock
|type2=Electric
|ability=Quark Drive
|move1=Wild Charge|move1type=Electric|move1cat=Physical
|move2=Pin Missile|move2type=Bug|move2cat=Physical
|move3=Earthquake|move3type=Ground|move3cat=Physical
|move4=Stealth Rock|move4type=Rock|move4cat=Status}}
</div>
<div style="display:inline-block">
<p style="text-align:center; font-weight:bold;">Scarlet and Violet</p>
{{Pokémon/9
|ndex=934
|pokemon=Garganacl
|gender=male
|level=80
|tera=Stellar
|type1=Rock
|ability=Purifying Salt
|move1=Hammer Arm|move1type=Fighting|move1cat=Physical
|move2=Heavy Slam|move2type=Steel|move2cat=Physical
|move3=Earthquake|move3type=Ground|move3cat=Physical
|move4=Stone Edge|move4type=Rock|move4cat=Physical}}
</div>

===Optional Stellar Tera Pokémon===
[[File:SV Stellar Garchomp Room.png|thumb|230px|Stellar Tera Type {{p|Garchomp}}'s location]]
A {{p|Garchomp}} can be encountered and subsequently defeated in order to shrink a crystal in the room prior to one that wraps downwards in a staircase. It cannot be caught, and is coded to never be {{Shiny}}.

{{Pokémon/9
|ndex=445
|pokemon=Garchomp
|gender=male
|level=80
|tera=Stellar
|type1=Dragon
|type2=Ground
|ability=Sand Veil
|move1=Dragon Claw|move1type=Dragon|move1cat=Physical
|move2=Dig|move2type=Ground|move2cat=Physical
|move3=Sandstorm|move3type=Rock|move3cat=Status
|move4=Take Down|move4type=Normal|move4cat=Physical}}

===Terapagos===
[[File:SV VS Stellar Form Terapagos.png|thumb|230px|Battling Stellar Form Terapagos]]
After [[Kieran]] has been defeated, he will attempt to Terastalize Terapagos, causing it to become uncontrollable. The player must battle it with no opportunity to change teams or heal from the end of the previous battle; losing this battle will revert the game back to before the player's battle against Kieran. It must be caught by the player upon its defeat, and is coded to never be {{Shiny}}. Additionally, this Terapagos is always coded to be male, despite it having a [[gender]] ratio of one male to one female.

In the battle against Stellar Form Terapagos, it has four times the usual amount of health (with a large health bar across the top of the screen in a similar fashion to [[Titan Pokémon]] and [[Starmobile]]s, which identifies it as '''Terapagos, the Hidden Treasure of Area Zero'''), and unlimited PP for all of its moves, but its {{a|Teraform Zero}} ability does not function. Similar to a [[Tera Raid Battle]], it can put up a shield to become immune to many status moves and reduce the damage it takes from attacking moves, and the player will be unable to Terastallize their Pokémon until they charge the Tera Orb by hitting with a certain number of damaging moves, but only two attacks are required to charge it, instead of the three from standard Tera Raid Battles. Unlike Tera Raid Battles, there is no time limit and no cheering, and the player can switch Pokémon and use items from the Bag.

Terapagos will put up three shields over the course of the battle: one at the beginning, and the others immediately after the previous shield is broken. Each shield covers 27% of Terapagos's health bar, and if any attack deals enough damage to break the shield, all further damage from that attack (including from [[multi-strike move]]s) is prevented, similar to {{g|Sword and Shield}}'s [[Max Raid Battle]]s. When a new shield is put up, Terapagos is cured of any status condition, all stat modifiers to any Pokémon are erased (but other field effects such as [[weather]] and {{m|Light Screen}} remain in place), and if any of the player's Pokémon have been Terastallized, they lose that status. The Tera Orb must be recharged before the player can Terastallize a Pokémon again.

* In the first phase of the battle, Terapagos is {{t|Normal}} type, and Carmine participates as a partner using her Sinistcha. If Sinistcha faints, the player must continue the remainder of the phase alone. If Sinistcha has not yet fainted when the shield breaks, Terapagos will use {{m|Zen Headbutt}} at that time, and Sinistcha will automatically faint as a result, regardless of any effects that would prevent the move from being used, or would reduce the amount of damage dealt.
* In the second phase, Terapagos changes to a {{t|Psychic}} type, and the player must face it alone.
* In the third phase, Terapagos changes to a {{t|Water}} type, and Kieran joins as a partner using his remaining five Pokémon. Terapagos will remain Water type after the final shield is broken.

{{Party/Single
|color={{factory color}}
|bordercolor={{scarlet color dark}}
|headcolor={{scarlet color light}}
|sprite=VSCarmine.png
|size=x100px
|prize=none
|class=Pokémon Trainer
|classlink=Pokémon Trainer
|name={{color2|000|Carmine}}
|game=SV
|location=Area Zero Underdepths
|pokemon=1}}
| style="margin:auto" |{{Pokémon/9
|ndex=1013
|pokemon=Sinistcha
|level=75
|type1=Grass
|type2=Ghost
|ability=Hospitality
|move1=Matcha Gotcha|move1type=Grass|move1cat=Special
|move2=Life Dew|move2type=Water|move2cat=Status
|move3=Shadow Ball|move3type=Ghost|move3cat=Special
|move4=Rage Powder|move4type=Bug|move4cat=Status}}
{{Party/Footer}}
{{-}}
{{Party/Single
|color={{factory color}}
|bordercolor={{violet color dark}}
|headcolor={{violet color light}}
|sprite=VSKieran 3.png
|size=x100px
|prize=none
|class=Pokemon Trainer
|classlink=Pokemon Trainer
|name={{color2|000|Kieran}}
|game=SV
|location=Area Zero Underdepths
|pokemon=5}}
|{{Pokémon/9
|ndex=1019
|pokemon=Hydrapple
|gender=male
|level=82
|type1=Grass|type2=Dragon
|ability=Supersweet Syrup
|move1=Syrup Bomb|move1type=Grass|move1cat=Special
|move2=Fickle Beam|move2type=Dragon|move2cat=Special
|move3=Dragon Cheer|move3type=Dragon|move3cat=Status
|move4=Body Press|move4type=Fighting|move4cat=Physical}}
|{{Pokémon/9
|ndex=149
|pokemon=Dragonite
|gender=male
|level=80
|type1=Dragon|type2=Flying
|ability=Multiscale
|move1=Hurricane|move1type=Flying|move1cat=Special
|move2=Thunder|move2type=Electric|move2cat=Special
|move3=Extreme Speed|move3type=Normal|move3cat=Physical
|move4=Breaking Swipe|move4type=Dragon|move4cat=Physical}}
|{{Pokémon/9
|ndex=474
|pokemon=Porygon-Z
|level=81
|type1=Normal
|ability=Adaptability
|move1=Hyper Beam|move1type=Normal|move1cat=Special
|move2=Shadow Ball|move2type=Ghost|move2cat=Special
|move3=Thunderbolt|move3type=Electric|move3cat=Special
|move4=Ice Beam|move4type=Ice|move4cat=Special}}
{{Party/Div|color={{factory color}}}}
| style="margin:auto" |{{Pokémon/9
|ndex=861
|pokemon=Grimmsnarl
|gender=male
|level=81
|type1=Dark|type2=Fairy
|ability=Prankster
|move1=Sucker Punch|move1type=Dark|move1cat=Physical
|move2=Spirit Break|move2type=Fairy|move2cat=Physical
|move3=Reflect|move3type=Psychic|move3cat=Status
|move4=Light Screen|move4type=Psychic|move4cat=Status}}
| style="margin:auto" |{{Pokémon/9
|ndex=727
|pokemon=Incineroar
|gender=male
|level=81
|type1=Fire|type2=Dark
|ability=Intimidate
|move1=Flare Blitz|move1type=Fire|move1cat=Physical
|move2=Darkest Lariat|move2type=Dark|move2cat=Physical
|move3=Fake Out|move3type=Normal|move3cat=Physical
|move4=Brick Break|move4type=Fighting|move4cat=Physical}}
{{Party/Footer}}
{{-}}
{{Pokémon/9
|ndex=1024
|pokemon=Terapagos
|gender=male
|img=HOME1024S
|type1=Normal
|tera=Stellar
|ability=Tera Shift
|level=85
|move1=Tera Starstorm|move1type=Normal|move1cat=Special
|move2=Zen Headbutt|move2type=Psychic|move2cat=Physical
|move3=Earth Power|move3type=Ground|move3cat=Special
|move4=Water Pulse|move4type=Water|move4cat=Special}}

==Trainers==
When Kieran is controlling Terapagos, it possesses twice the usual amount of [[HP]] and has a large HP bar at the top of the screen that identifies it as '''Terapagos, the Indigo Disk'''.
{{Party/Single
|color={{factory color}}
|bordercolor={{violet color dark}}
|headcolor={{violet color light}}
|sprite=VSKieran 4.png
|size=x100px
|prize=none
|class=Pokemon Trainer
|classlink=Pokemon Trainer
|name={{color2|000|Kieran}}
|game=SV
|location=Area Zero Underdepths
|pokemon=1}}
| style="margin:auto" |{{Pokémon/9
|ndex=1024
|pokemon=Terapagos
|form=-Terastal
|gender=male
|level=85
|type1=Normal
|ability=Tera Shell
|move1=Zen Headbutt|move1type=Psychic|move1cat=Physical
|move2=Earth Power|move2type=Ground|move2cat=Special
|move3=Water Pulse|move3type=Water|move3cat=Special}}
{{Party/Footer}}

==Music==
{| class="roundtable" style="margin:auto; text-align: center; background: #{{locationcolor/med|land}}; border: 3px solid #{{locationcolor/dark|land}}"
|- style="background:#{{locationcolor/light|land}}"
! Games
! Location
! Song name
! Composition
! Arrangement
|- style="background:#FFF"
! rowspan="7" |{{GameIcon|Sc}}{{GameIcon|Vi}}
| When in the Underdepths
| Area Zero Underdepths*
| [[Toby Fox]]<ref name=Newsletter>[https://toby.fangamer.com/newsletters/winter22/ UNDERTALE / DELTARUNE NEWSLETTER: ISSUE 1 (Winter 2022) -- Fox and Ichinose were responsible for the original AZ track, which this arranges]</ref> <br> [[Go Ichinose]]
| Unknown
|-
| During a wild <br>Pokémon battle
| Battle! (Area Zero)*
| [[Toby Fox]]<br>[[Go Ichinose]]
| Unknown
|-
| When Terapagos awakens from its gem
| Terapagos Awakens*
| Unknown
| Unknown
|-
| When battling Kieran's <br> Terapagos in the Underdepths
| Battle! (The Indigo Disk)*
| Unknown
| Unknown
|-
| When Briar prompts Kieran <br> to Terastalize Terapagos
| The Hidden Treasure Within*
| Unknown
| Unknown
|-
| When Kieran attempts to <br> recall Terapagos to its Poké Ball
| Come back, Terapagos!*
| Unknown
| Unknown
|-
| When battling Stellar Form Terapagos
| Battle! (Stellar Form Terapagos)*
| Toby Fox<ref>Arrangement of the Tera Raid theme, which was composed by Fox</ref>
| Unknown
|-
| class="roundybottom" style="background: #{{locationcolor/light|land}}" colspan="5" | <small>'''Song names marked with an asterisk are unofficial, as they have not received a soundtrack release.'''</small>
|}

==Trivia==
===Name origin===

==In other languages==
{{langtable|color={{locationcolor/light|land}}|bordercolor={{locationcolor/dark|land}}
|zh_cmn=零之大空洞 ''{{tt|Líng zhī Dàkōngdòng|Great Zero Hollow}}''
|zh_yue=零之大空洞 ''{{tt|Lìhng jī Daaihhūngduhng|Great Zero Hollow}}''
|fr=Abîme Zéro
|de=Höhlensystem Null
|it=Grande Abisso Zero
|ko=제로의 대공동 ''{{tt|Zero-ui Daegongdong|Great Zero Hollow}}''
|es=Caverna Abisal Cero
}}

==Related articles==
* [[The Hidden Treasure of Area Zero]]
* [[Professor Sada]]
* [[Professor Turo]]
* [[Area Zero]]
* {{p|Terapagos}}
* [[Paradox Pokémon]]
* [[Stellar (type)]]

==References==
{{reflist}}
{{Paldea}}
{{-}}
{{Project Locations notice}}

[[Category:Scarlet and Violet locations]]

[[de:Höhlensystem Null]]
[[fr:Abîme Zéro]]
[[it:Grande Abisso Zero]]
[[zh:零之大空洞]]