Cerulean Cave

Cerulean Cave (Japanese: ハナダの Hanada Cave), introduced as Unknown Dungeon (Japanese: ななしのどうくつ Nameless Cave), is a cave located in the northwest corner of Cerulean City in Kanto.
The cave's moniker would later be reused for the in Kalos, which is a direct reference to Cerulean Cave.
==Terminology==
===Unknown Dungeon===
The English name "Unknown Dungeon" has never appeared in-game as the name of this cave.
* In Pokémon Stadium, this place name is found at the game data, although the name is not visible in-game because it is not selectable at the map.
* This location is referred to as "Unknown Dungeon" in the Generation I game manuals, as well as in the guidebooks Pokémon: Official Nintendo Player's Guide, Pokémon: Special Edition for Yellow, Red and Blue: Official Nintendo Player's Guide, and Pokémon Red and Blue: Prima's Official Strategy Guide.
** It also carries this name in Pokémon Master Trainer (1999).
The Japanese name 「ななしのどうくつ」 (Nameless Cave) is used in Generation I.
* In the Japanese version of , this location is referred to by this name on the Town Map, although this was translated as "Cerulean Cave" in English.
* In (never released in English), as well as the Japanese version of Pokémon Stadium, this place name is found at the game data, although the name is not visible in-game because it is not selectable at the map.
===Cerulean Cave===
The English name "Cerulean Cave" is used in all games that refer to this cave, from Generation I onward (including at the in Pokémon Stadium 2).
* In , this name is used by the NPC who blocks the cave entrance. This name is also used on the Town Map (only visible if the player uses the Town Map inside the Cerulean Cave), although the Japanese name used on the map is 「ななしのどうくつ」 (Nameless Cave) instead.
* In , this location is referred to by this name in the game data, but because the location itself does not appear in the games, this name is not visible in-game.
** The Poké Seer (available in Crystal only) is able to tell if a Pokémon was caught in this cave. However, this does not happen in normal gameplay because, in addition to the cave being unavailable in Generation II, any Pokémon transferred from Generation I games would not have this data.
The Japanese name 「ハナダ どうくつ」 (Hanada Cave) is used in .
* In these games, this name is used by the NPC who blocks the cave entrance, and also in an email at the computer in Cinnabar Lab. In English, the email instead refers to "the cavern close to Cerulean" rather than naming it.
The Japanese name 「ハナダのどうくつ」 (Hanada Cave) is used from Generation II onward (including at the in the Japanese version of Pokémon Stadium 2). Its kanji equivalent 「ハナダの」 was introduced in Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!.
* In the Japanese version of , this location is referred to by this name in the game data, but because the location itself does not appear in the games, this name is not visible in-game.
==Role==
Cerulean Cave is home to a wide variety of high-level wild Pokémon. inhabits the deepest part of the cave.
The cave is managed by the Pokémon League and can only be entered after the player has entered the Hall of Fame/restored the Network Machine of the Pokémon Network Center on the Sevii Islands to operational status/earned all the Kanto Badges.
In Pokémon FireRed and LeafGreen, more Pokémon can be found only by fishing, while there are fewer different species of wild Pokémon found by walking around in the cave.
In Generation II, Cerulean Cave completely collapsed but the leftovers of Mewtwo's presence remain and are found in the lake near the cave, in the form of the item Berserk Gene. In , Cerulean Cave has been rebuilt and Mewtwo can once again be found inside. In Pokémon HeartGold and SoulSilver, if Mew is brought along, it will sense Mewtwo's presence and act apprehensive.
==Geography==
Cerulean Cave is a large underground complex of maze-like tunnels which extend out from Cerulean City to the mountains beyond. With the dark entrance positioned on the outskirts of Cerulean City, only accessible by ing down to the entrance near the northern border of Cerulean City, the cave has been renowned for its mystery. The entrance to the cave looks like it has been carved out from a hillside, forming an indented entrance into the hill. An NPC guards the entrance to the cave and only allows s who own all eight Kanto Gym Badges and have entered the Hall of Fame to enter.
At the deepest point of the cave lives , a that can only be found in Cerulean Cave. Mewtwo was artificially created in the before it became too powerful and escaped, exiling itself to the cave, never to be seen again.
Cerulean Cave has had many different layouts over time, getting a change from not only one generation to the next but also from one game release to the next. Despite these changes, the first floor is mostly unaffected and has a large underground lake which covers most of the area. Using the complex of stairs and ladders, Trainers can make their way around the lake and the first floor of the cave. They will reach the upper floor, which has no underground river, but a like maze-like structure formed by large boulders and rocks that must be maneuvered around in order to reach the end. Once Trainers get through the maze formation, they are able to climb the ladders and get around the underground lake on the basement floor, which will lead them straight to a dead end and to Mewtwo.
==Items==
===Pokémon Red and Green===
===Pokémon Red and Blue===
The Japanese has the same map and item locations as the international .
===Pokémon Yellow===
===Pokémon FireRed and LeafGreen===
===Pokémon HeartGold and SoulSilver===
====Rock Smash====
If the rock contains an item, the game will pick one of the following:
===Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!===
====Water====
====Glittering Ground====
====Recurring hidden items====
These items are hidden at certain spots of the cave and respawn occasionally or daily. The item received is not determined until it is picked up, so what item is found can be affected by resetting. Unlike Celadon Game Corner, where the game will only respawn the item every midnight, in Cerulean Cave most items will try to reappear every 256 steps; to respawn the items after collecting them, the player must leave the floor and also take enough steps (the player can accomplish this by going down a ladder, coming back up the ladder, and walking around until the items respawn).
The item on B1F plateau next to Mewtwo's respawns every midnight like in Celadon Game Corner; the spots on 2F respawn based on steps with following odds:https://twitter.com/Sibuna_Switch/status/1856587218246098944https://twitter.com/Sibuna_Switch/status/1836272561719574956
=====Poké Balls=====
*Northern spot next to a pair of ladders on 2F (20%)
*Northeastern spot next to a pair of ladders on 2F (15%)
*Northwestern spot next to a pair of ladders on 2F (15%)
*Southwestern spot next to a ladder on 2F (15%)
*Southern spot on 2F (20%)
=====Berries=====
*Southeastern spot on 2F, right side of the rock (20%)
*Southeastern spot on 2F, left side of the rock (30%)
*Spot in middle of 2F, next to large crystal (30%)
*Northwestern spot between pair of ladders on 2F(20%)
*Eastern spot next to a pair of ladders on 2F (30%)
=====2F crystal=====
10% chance to generate an item.
=====B1F plateau=====
==Pokémon==
===Generation I===
Wild Pokémon Encounter DataPokémon Red and Blue Disassembly Wild Encounter Data - PretPokémon Yellow Disassembly Wild Encounter Data - PretPokémon Blue (Japanese) Wild Encounter Data - Shinyfinder
====1F====
====2F====
====B1F====
===Generation III===
====1F====
====2F====
====B1F====
===Generation IV===
====1F====
====2F====
====B1F====
===Generation VII===
====1F====
====2F====
====B1F====
==Special encounters==
===Generation I===
A appears on B1F on the first visit.
===Generation III===
A appears on B1F on the first visit. If run from, it respawns after leaving the area.
===Generations IV and VII===
A appears on B1F on the first visit. If defeated or run from, it respawns after entering the Hall of Fame.
HeartGold and SoulSilver	Let's Go, Pikachu! and Let's Go, Eevee!
 	
==Trainers==
===Generation VII===
|
|
|
|
|
|
==Walking Pokémon effects==
When interacting with walking Pokémon in , the Pokémon may occasionally show an altered mood specific to this location.
Games	Pokémon	Area 	Quote
 	 	 	
 	 	Anywhere	<Pokémon's name> suddenly shouted!
 	 	Anywhere	<Pokémon's name> looked up at the ceiling and howled!
 	 	Anywhere	<Pokémon's name> slapped at the ground!
 	 	Anywhere	<Pokémon's name> suddenly started spinning around!
 	 	Anywhere	<Pokémon's name> suddenly started shouting!
 	 	Anywhere	<Pokémon's name> trembled.
==Layout==
The layout of the cave has been tweaked several times in the past, particularly in Generation I.
In , it has been restored to the original layout found in , with the addition of breakable rocks.
In , the layout of the first and second floors is based on the equivalent layout from Pokémon FireRed and LeafGreen, while the layout of the basement is based on the respective layout from . Breakable rocks are also present and surfaces were added.
Version	1F 	2F 	B1F
 	 	 	
 	 	 	
 	 	 	
 	 	 	
 	 	 	
 	 	 	
 	 	 	
 	 	 	
 	 	 	
  	 	 	 
==Preview==
File:FL Cerulean Cave.png|FRLG
File:HGSS Cerulean Cave-Morning.png|HGSS Morning (Ditto)
File:HGSS Cerulean Cave-Day.png|HGSS Day/Evening (Ditto)
File:HGSS Cerulean Cave-Night.png|HGSS Night (Magneton)
==Artwork==
Concept art from the
==In animation==
===Pokémon Origins===
Cerulean Cave appeared in File 4: Charizard. It was first mentioned by , who had gone to the cave after hearing rumors of an extremely strong Pokémon living in there. He intended to catch it, but got badly injured while battling it when his was sent flying and crashed on top of him. After he had told Professor Oak and about this, Red soon recalled the he had found at the at Cinnabar Island, and understood that the mysterious Pokémon was in fact , an artificial Pokémon created by enhancing the powers of .
Wanting to help Professor Oak to complete the Pokédex, Red then headed to Cerulean Cave, where he encountered Mewtwo. Being amazingly strong and , Mewtwo was capable of defeating almost all of Red's Pokémon, excluding only his . At first, even Charizard was losing, and was sent into the waters of the cave, along with Red. However, Red's Key Stone and Charizard's Mega Stone then activated, Mega Evolving Charizard into Mega Charizard X and making it able to defeat Mewtwo, allowing Red to catch it.
===Pokémon Evolutions===
Cerulean Cave appeared in The Discovery, where and both entered it in order to find and catch . When Trace's was badly hurt by a swarm of and , he was forced to give up the race, allowing Green to reach the end of the cave first. There, however, she was upset to find out that had managed to catch Mewtwo first, and challenged her to a battle over it. However, despite using her , Green was still defeated when Elaine used Mewtwo against her. Green then handed Elaine Mewtwo's Mega Stones as a prize and jokingly suggested that she and Mewtwo should become her Pokémon, before leaving.
==In the manga==
===Pokémon Adventures===
========
Cerulean Cave appeared in And Mewtwo Too?! and And Mewtwo... Three!. Upon hearing from about a monster that had caused massive destruction in the northwest sector of Cerulean City, went to investigate Cerulean Cave, where the monster was said to have fled to. Once Red arrived at the cave, he and were soon caught in a tornado, which seemed to originate from inside the cave. Red and his Pokémon were saved from being blown away by Blaine and his . Blaine explained that the tornado was actually , a move capable of both attacking and defending at the same time, and the user of the move was , the "beast" sighted in Cerulean City.
Blaine revealed that he, while working as a scientist in Team Rocket, had been involved in Mewtwo's creation. Since Team Rocket had been unable to get enough of 's DNA to complete the , Blaine had finished it by using cells from his own arm. In the process, some of Mewtwo's cells had ended up in his arm, causing it to become horribly mutatated, much to Red's horror. This also gave both Blaine and Mewtwo the ability to sense each other's presence. However, the mutated cells in his arm were slowly spreading to the rest of his body, and would eventually kill him. Realizing what kind of an abomination he had created, Blaine had subsequently left Team Rocket.
Blaine was determined to destroy the monster he himself had created, even if it would cost him his life. After putting Red inside of a protective fireball, he and Rapidash charged through the Psywave tornado at Mewtwo, creating a massive explosion. Despite the hit, Mewtwo was still capable of fighting. As Blaine was down for the count, Red tried to battle Mewtwo himself, sending out his Poliwrath. However, Mewtwo easily knocked the Tadpole Pokémon back with a giant spoon it created. Blaine explained that Mewtwo would form its Psywave into a tornado while fighting multiple enemies at once, and into a spoon for a single enemy. This gave Red an idea, and he sent out all of his Pokémon, causing Mewtwo to switch into its tornado tactic again. However, before the tornado got to full power, Red dived into the eye of the storm with his Aerodactyl, and sent his Pikachu diving further down into Mewtwo itself, catching it with the Master Ball that Blaine had given to Red just moments earlier. Afterwards, Red gave Mewtwo to Blaine and asked him to teach it the kindness of humans.
===Pokémon Zensho===
Cerulean Cave was mentioned in PZ10, where Professor Oak showed and a photo of taken within the cave. The two young Trainers subsequently headed for the cave to capture Mewtwo together.
==Trivia==
===Cerulean Cave on the map===
In the Generation I games, Cerulean Cave is only listed in the Town Map if the player uses this item while inside the cave. However, Cerulean Cave is not listed at all in the Pokémon location map from the Pokédex, likely to keep its existence as a secret until the player beats the game. For instance, is only available at the Cerulean Cave in , but Rhydon's Pokédex map simply says "Area unknown". Similarly, is available in multiple places including the Cerulean Cave, but only the other places are shown in the Pokédex map.
Cerulean Cave is also absent from the Pokémon location map in the from both the Japanese Pokémon Stadium and Pokémon Stadium, but it is present in Pokémon Stadium 2. As a result, the player may connect any Generation I or II core series game to Pokémon Stadium 2 via Transfer Pak and check their location in the Pokédex normally, including those Pokémon available in the Cerulean Cave.
==In other languages==
Cerulean Cave	
Unknown Dungeon
==References==
==Related articles==
Category:Kanto locations
Category:Red, Blue and Yellow locations
Category:FireRed and LeafGreen locations
Category:HeartGold and SoulSilver locations
Category:Let's Go, Pikachu! and Let's Go, Eevee! locations
Category:Caves
de:Azuria-Höhle
es:Cueva Celeste
fr:Caverne Azurée
it:Grotta Celeste
ja:ハナダのどうくつ
zh:华蓝洞窟