Unknown Dungeon (Kalos)

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Unknown Dungeon ななしの洞窟
Nameless Cave
"Wild Missingno. appeared!"
Unknown Dungeon XY.png
Map description: {{{mapdesc}}}
Location: Pokémon Village
Region: Kalos
Generations: VI
Kalos Pokémon Village Map.png
Location of Unknown Dungeon in Kalos.
Pokémon world locations

The Unknown Dungeon (Japanese: ななしの洞窟 Nameless Cave) is a very small cave in southern Kalos that can be accessed from Pokémon Village. A sole Mewtwo resides in the center with a game-specific Mewtwonite. The Unknown Dungeon is only accessible to Trainers who enter the Hall of Fame. Surf is needed to access the cave.

Its purpose as a place to catch Mewtwo is a direct reference to Cerulean Cave in Kanto. It also shares its name with the alternative moniker for Cerulean Cave used in Japanese releases of the Generation I games.


The Unknown Dungeon is a tiny cave whose entrance is found in the side of a mountain. The cave is barren in terms of terrain aside from the occasional water drop and the few rocks that dot the floor. Mewtwo awaits the player in the center of the cave, facing away from the entrance.


Item Location Games
Oval Stone Oval Stone On the small stalagmite in the northwest of the cave (hidden, reappears occasionally)  X  Y 
Mewtwonite X Mewtwonite X Automatically obtained after capturing Mewtwo  X 
Mewtwonite Y Mewtwonite Y Automatically obtained after capturing Mewtwo  Y 

Natural objects

Item Location Games
Hard Stone Hard Stone Randomly found by using Hyper Voice or Rock Slide on a spiky rock during a battle  X  Y 
Float Stone Float Stone Randomly found by using Hyper Voice or Rock Slide on a spiky rock during a battle  X  Y 
Damp Rock Damp Rock Found by using Muddy Water, Surf, or Water Spout on a thin rock during a battle  X  Y 


  Pokémon     Games     Location     Levels     Rate  
Special Pokémon
Mewtwo Mewtwo
Premier Ball Only one
70 One
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

In the manga

The Unknown Dungeon in Pokémon Adventures

In the Pokémon Adventures manga

The Unknown Dungeon appeared briefly in Malamar Traps, where Mewtwo was shown residing inside the cave, waiting to make its move against Team Flare.

In other languages

Language Title
France Flag.png French Grotte Inconnue
Germany Flag.png German Geheimdungeon
Italy Flag.png Italian Grotta Ignota
South Korea Flag.png Korean 이름없는 동굴 Ireum-eopneun Donggul
Spain Flag.png Spanish Mazmorra Rara

Game locations of Legendary and Mythical Pokémon
Kanto Seafoam IslandsPower PlantVictory RoadCerulean Cave
Route 10Route 25Pewter CityRoaming Pokémon
Sevii Islands Mt. EmberNavel RockBirth Island
Johto Ilex ForestBell TowerWhirl IslandsMt. Silver
Burned TowerEmbedded TowerRoaming Pokémon
Hoenn Desert RuinsIsland CaveAncient TombCave of OriginMarine Cave
Terra CaveSky PillarSouthern IslandSea MauvilleScorched Slab
Pathless PlainNameless CavernFabled CaveGnarled Den
Trackless ForestCrescent IsleSkyRoaming Pokémon
Sinnoh Acuity CavernValor CavernSpear PillarTurnback Cave
Rock Peak RuinsIceberg RuinsIron RuinsSnowpoint TempleStark Mountain
Newmoon IslandFlower ParadiseHall of OriginRoaming Pokémon
Unova Guidance ChamberTrial ChamberRumination FieldN's CastleAbundant Shrine
Giant ChasmDragonspiral TowerLiberty GardenRoute 11Route 13Route 22
Route 23Celestial TowerNacrene CityUnderground RuinsTwist Mountain
DreamyardMarvelous BridgeReversal MountainRoaming Pokémon
Kalos Sea Spirit's DenTeam Flare Secret HQTerminus Cave
Unknown DungeonRoaming Pokémon
Alola Route 16Altar of the SunneAltar of the MooneMount LanakilaMahalo Trail
Ruins of ConflictRuins of LifeRuins of AbundanceRuins of Hope
Aether ParadiseAncient Poni PathLake of the SunneLake of the Moone
Ten Carat HillResolution Cave
Galar Tower SummitBattle TowerMaster DojoCrown ShrineMax Lair
Rock Peak RuinsIceberg RuinsIron RuinsSplit-Decision RuinsGiant's Bed
Frigid SeaLakeside CaveBallimere LakeFreezingtonRoaming Pokémon
Other Faraway IslandDistortion WorldSinjoh RuinsUltra Space Wilds

Bug Badge.png Cliff Badge.png Rumble Badge.png Plant Badge.png Voltage Badge.png Fairy Badge.png Psychic Badge.png Iceberg Badge.png
Vaniville TownAquacorde Town‎Santalune CityLumiose CityCamphrier TownCyllage City
Ambrette TownGeosenge TownShalour CityCoumarine CityLaverre CityDendemille TownAnistar City
Couriway TownSnowbelle CityPokémon LeagueKiloude City‎
Santalune ForestChamber of EmptinessParfum PalaceBattle ChateauBerry fieldsConnecting CaveGlittering CaveReflection Cave
Tower of MasteryAzure BaySea Spirit's DenKalos Power PlantPoké Ball FactoryLost HotelFrost CavernLysandre Labs
Team Flare Secret HQTerminus CavePokémon VillageVictory RoadBattle MaisonFriend SafariUnknown Dungeon

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