Cerulean Cave

Nameless Cave redirects here. For the location in Hoenn with a similar name, see Nameless Cavern.

Cerulean Cave Unknown Dungeon ハナダの洞窟 Hanada Cave "Wild Missingno. appeared!"
Map description:	A mysterious cave that is filled with terribly tough Pokémon. It is so dangerous, the Pokémon League is in charge of it.FRLG A cave that had collapsed once. It has been reconstructed.HGSS
Location:	Cerulean City
Region:	Kanto
Generations:	I, III, IV, VII
Location of Cerulean Cave in Kanto.
Pokémon world locations

Cerulean Cave (Japanese: ハナダの洞窟 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 Unknown Dungeon 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 Pokédex 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 Pokémon Red, Green, Blue, and Yellow, this location is referred to by this name on the Town Map, although this was translated as "Cerulean Cave" in English.
• In Japanese Pokémon Stadium (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 Pokédex 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 Pokédex in Pokémon Stadium 2).

• In Pokémon Red, Blue, and Yellow, 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 Pokémon Gold, Silver, and Crystal, 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 Pokémon Red, Green, Blue, and Yellow.

• 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 Pokédex in the Japanese version of Pokémon Stadium 2). Its kanji equivalent 「ハナダの洞窟(どうくつ)」 was introduced in Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!.

• In the Japanese version of Pokémon Gold, Silver, and Crystal, 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. Mewtwo 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^RBYPE/restored the Network Machine of the Pokémon Network Center on the Sevii Islands to operational status^FRLG/earned all the Kanto Badges^HGSS.

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 Pokémon HeartGold and SoulSilver, 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

Encountering Mewtwo in the cave in Let's Go, Pikachu! and Let's Go, Eevee!

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 surfing down Route 24 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 Trainers who own all eight Kanto Gym Badges and have entered the Hall of Fame to enter.

At the deepest point of the cave lives Mewtwo, a Pokémon that can only be found in Cerulean Cave. Mewtwo was artificially created in the Pokémon Mansion 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

Item		Location	Games
	Nugget	1F, in the northwest area of the floor	Rᴶ  G
	Full Restore ×2	1F, in the southwest area of the floor 2F, in the eastern area of the floor; accessible from the ladder on the plateau north of the entrance	Rᴶ  G
	Max Elixer	1F, northernmost point of the large middle plateau	Rᴶ  G
	Rare Candy	1F, on a rock southwest of Max Elixer (hidden, broken)	Rᴶ  G
	Ultra Ball ×3	2F, in the southeast area of the floor, accessible from the ladder on the large middle plateau on 1F B1F, in the eastern area on the plateau B1F, on a lone rock near Max Revive (hidden, broken)	Rᴶ  G
	PP Up	2F, in the southwest area of the floor, accessible from the south ladder on the western plateau on 1F	Rᴶ  G
	Max Revive	B1F, in the northeast area of the floor	Rᴶ  G

Pokémon Red and Blue

The Japanese Pokémon Blue has the same map and item locations as the international Pokémon Red and Blue.

Item		Location	Games
	Max Elixer	1F, southwest of the northeasternmost ladder	R  B
	Nugget	1F, in the northwest area of the floor	R  B
	Rare Candy	1F, on a rock on the plateau east of the Full Restore (hidden)	R  B
	Full Restore ×2	1F, in the southwest area of the floor 2F, northwest of the center of the floor, accessible from the ladder on a plateau in the northwest area of 1F	R  B
	PP Up	2F, in the east area of the floor, accessible from the ladder on the plateau north of the entrance on 1F	R  B
	Ultra Ball ×3	2F, in the southwest area of the floor, accessible from the southwesternmost ladder on 1F B1F, near the center of the floor B1F, on a rock that stands out in the northeast area of the floor (hidden)	R  B
	Max Revive	B1F, in the northeast area of the floor	R  B

Pokémon Yellow

Item		Location	Games
	Max Elixer ×2	1F, northeast of the southwesternmost ladder B1F, in the north area of the floor	Y
	Rare Candy ×2	1F, near the southeast corner of the floor 2F, in the west area of the floor, accessible from the easternmost ladder in the northeast area of 1F	Y
	Ultra Ball ×4	1F, northeast of the center of the floor 2F, near the center of the floor, accessible from the southwesternmost ladder on 1F B1F, on the southwesternmost plateau B1F, near the northeast corner of the floor	Y
	Max Revive ×3	1F, in the east area of the floor 2F, southeast of the center of the floor, accessible from the southwesternmost ladder on 1F B1F, on the southwesternmost plateau	Y
	PP Up ×3	1F, on a lone rock south of the Ultra Ball (hidden) 2F, on the lone rock south of the center of the floor, accessible from the southwesternmost ladder on 1F (hidden) B1F, on a rock that stands out close to the waterway to the southwesternmost plateau (hidden)	Y
	Full Restore	2F, in the east area of the floor, accessible from the ladder in the east area of 1F	Y

Pokémon FireRed and LeafGreen

Item		Location	Games
	Nugget	1F, in the northwest area of the floor	FR  LG
	Ultra Ball ×3	1F, two squares east of the ladder closest to the Nugget (hidden) 2F, in the southeast area of the floor, accessible from the ladder in the east area of 1F (requires Rock Smash) B1F, northeast of the center of the map, on a plateau	FR  LG
	Max Elixir	1F, northeast of the center of the floor, on a plateau	FR  LG
	Full Restore ×2	1F, in the southwest area of the floor 2F, in the east area of the floor, accessible from the northeasternmost ladder on 1F (requires Rock Smash)	FR  LG
	PP Up	2F, in the southwest area of the floor, accessible from the southwesternmost ladder on 1F (requires Rock Smash)	FR  LG
	Max Revive	B1F, in the northeast area of the floor	FR  LG

Pokémon HeartGold and SoulSilver

Item		Location	Games
	Nugget ×2	1F, near the northwest corner B1F, behind a lone breakable rock northeast of the rocks in the center (hidden)	HG  SS
	Hyper Potion	1F, on the wall behind the breakable rocks in the southwest corner (hidden)	HG  SS
	Full Restore	1F, along the south wall	HG  SS
	Revive	1F, on a small crystal in the middle (hidden)	HG  SS
	Max Elixir	1F, near the center, at the end of a bridge	HG  SS
	Sea Incense	1F, north edge	HG  SS
	Rare Candy	1F, in the far southeast corner (hidden)	HG  SS
	TM24 (Thunderbolt)	2F, northeast corner (requires Rock Smash)	HG  SS
	PP Up ×2	2F, west side of 2F 2F, in the large open area on the east side (hidden)	HG  SS
	Zinc	2F, in the large open area on the east side (hidden)	HG  SS
	Full Heal	2F, in the large open area on the east side (hidden)	HG  SS
	Big Pearl	2F, in the large open area on the east side (hidden)	HG  SS
	Ultra Ball ×4	2F, west side 2F, in the large open area on the east side (hidden) B1F, west of the breakable rocks in the center (hidden) B1F, near the southwest corner	HG  SS
	Odd Incense	2F, near the center (requires Rock Smash)	HG  SS
	Protein	2F, near the northwest corner (hidden)	HG  SS
	Max Revive ×2	B1F, among the breakable rocks on the west side (hidden) B1F, northwest of the breakable rocks in the center	HG  SS
	Dusk Stone	B1F, center (requires Rock Climb)	HG  SS
	Electirizer	B1F, northeast corner (requires Rock Climb)	HG  SS
	Black Sludge	B1F, southeast corner	HG  SS

Rock Smash

If the rock contains an item, the game will pick one of the following:

Item		Location	Games
	Max Ether	Found by smashing breakable rocks (25%)	HG  SS
	Revive	Found by smashing breakable rocks (20%)	HG  SS
	Red Shard	Found by smashing breakable rocks (10% each)	HG  SS
	Blue Shard
	Yellow Shard
	Green Shard
	Heart Scale
	Star Piece	Found by smashing breakable rocks (5%)	HG  SS

Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!

Item		Location	Games
	PP Max	1F, near the ladder in the northeast corner of the floor	P  E
	Full Heal	1F, at the end of the water	P  E
	Full Restore	1F, on the plateau near the entrance (hidden) (daily)	P  E
	Max Revive	1F, northwest of the eastern ladder	P  E
	Max Repel	1F, southwest of the northern ladder	P  E
	Rare Candy	1F, south of the visible but inaccessible ladders to 2F and B1F in the northwest corner (hidden) (daily)	P  E
	Max Lure	2F, northwest of the pair of ladders	P  E
	Ultra Ball ×5	2F, near some rocks along the southern wall	P  E
	Rare Candy	2F, northwest of the Ultra Balls	P  E
	Max Revive	2F, in the southeast corner of the floor	P  E
	Full Restore ×2	2F, near the east wall, east of the pair of ladders B1F southwest of the Escape Rope, on a plateau	P  E
	Escape Rope	B1F, near the northeast corner of the floor	P  E
	Max Elixir	B1F, in the south area of the floor	P  E
	Max Revive	B1F, southeast of the pair of ladders (hidden) (daily)	P  E
	PP Max	B1F, at the end of the water west of Mewtwo's plateau (hidden) (daily)	P  E
	Mewtwonite X	B1F, received from Green after defeating her	P  E
	Mewtwonite Y	B1F, received from Green after defeating her	P  E
	Poké Ball ×5	B1F, on the ground after defeating Green	P  E

Water

Item		Location	Games
	Pearl	B1F, sometimes found by the player's walking Water-type Pokémon from the edge of the small pool of water (daily)	P  E
	Big Pearl
	Heart Scale

Glittering Ground

Item		Location	Games
	Pearl	1F, sometimes found by the player's walking Pokémon from a glowing spot near the western ladder to 2F (daily) 2F, sometimes found by the player's walking Pokémon from a glowing spot west of the large central crystal (daily)	P  E
	Big Pearl
	Stardust	2F, sometimes found by the player's walking Pokémon from a glowing spot in the northeastern corner of the floor (daily) B1F, sometimes found by the player's walking Pokémon from a glowing spot immediately northeast of the central plateau east of Mewtwo's plateau (daily)	P  E
	Star Piece

Recurring hidden items

This section is incomplete. Please feel free to edit this section to add missing information and complete it. Reason: Updated tables with item chances, see this twitter thread for details

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 this will happen every 256 steps (though is not guaranteed to be successful, with odds varying between the spots); 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).

2F glowing spot

Item		Location	Games
	Poké Ball	2F, sometimes found on a glowing spot	P  E
	Great Ball	2F, sometimes found on a glowing spot	P  E
	Ultra Ball	2F, sometimes found on a glowing spot	P  E
	Ultra Ball ×10	2F, sometimes found on a glowing spot	P  E
	Master Ball	2F, sometimes found on a glowing spot	P  E
	Golden Razz Berry	2F, sometimes found on a glowing spot	P  E
	Golden Nanab Berry	2F, sometimes found on a glowing spot	P  E
	Golden Pinap Berry	2F, sometimes found on a glowing spot	P  E

2F crystal

Item		Location	Games
	Max Revive	2F, sometimes found on the crystal in the middle of the floor	P  E
	Dome Fossil	2F, sometimes found on the crystal in the middle of the floor	P  E
	Helix Fossil	2F, sometimes found on the crystal in the middle of the floor	P  E
	Old Amber	2F, sometimes found on the crystal in the middle of the floor	P  E

B1F plateau

Item		Location	Games
	Dome Fossil	B1F, sometimes found on the central plateau east of Mewtwo's plateau	P  E
	Helix Fossil	B1F, sometimes found on the central plateau east of Mewtwo's plateau	P  E
	Old Amber	B1F, sometimes found on the central plateau east of Mewtwo's plateau	P  E

Pokémon

Generation I

1F

Pokémon	Games						Location	Levels	Rate
Arbok	R		B		Y		Cave	52	10%
Raichu	R		B		Y		Cave	53	4%
Sandslash	R		B		Y		Cave	52	10%
Golbat	R		B		Y		Cave	46	20%
Golbat	R		B		Y		Cave	50, 55	40%
Gloom	R		B		Y		Cave	55	10%
Parasect	R		B		Y		Cave	52	5%
Parasect	R		B		Y		Cave	54	5%
Venomoth	R		B		Y		Cave	49	10%
Venomoth	R		B		Y		Cave	54	5%
Kadabra	R		B		Y		Cave	49	5%
Weepinbell	R		B		Y		Cave	55	10%
Graveler	R		B		Y		Cave	45	15%
Magneton	R		B		Y		Cave	46	15%
Dodrio	R		B		Y		Cave	49	10%
Hypno	R		B		Y		Cave	46	20%
Ditto	R		B		Y		Cave	53	1%
Ditto	R		B		Y		Cave	55, 60	5%
Fishing
Magikarp	R		B		Y		Fishing Old Rod	5	100%
Poliwag	R		B		Y		Fishing Good Rod	10	50%
Goldeen	R		B		Y		Fishing Good Rod	10	50%
Slowbro	R		B		Y		Fishing Super Rod	23	25%
Kingler	R		B		Y		Fishing Super Rod	23	25%
Seadra	R		B		Y		Fishing Super Rod	23	25%
Goldeen	R		B		Y		Fishing Super Rod	25	40%
Seaking	R		B		Y		Fishing Super Rod	23	25%
Seaking	R		B		Y		Fishing Super Rod	35, 45, 55	60%
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.

2F

Pokémon	Games						Location	Levels	Rate
Sandslash	R		B		Y		Cave	56	10%
Wigglytuff	R		B		Y		Cave	54	5%
Golbat	R		B		Y		Cave	52, 57	40%
Gloom	R		B		Y		Cave	58	5%
Venomoth	R		B		Y		Cave	51	15%
Kadabra	R		B		Y		Cave	51	15%
Weepinbell	R		B		Y		Cave	58	5%
Graveler	R		B		Y		Cave	50	15%
Dodrio	R		B		Y		Cave	51	25%
Electrode	R		B		Y		Cave	52	10%
Marowak	R		B		Y		Cave	52	10%
Rhyhorn	R		B		Y		Cave	50	10%
Rhydon	R		B		Y		Cave	52	10%
Rhydon	R		B		Y		Cave	58, 60	5%
Chansey	R		B		Y		Cave	56	5%
Ditto	R		B		Y		Cave	55, 60	5%
Ditto	R		B		Y		Cave	60	10%
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.

B1F

Pokémon	Games						Location	Levels	Rate
Arbok	R		B		Y		Cave	57	5%
Raichu	R		B		Y		Cave	64	10%
Sandslash	R		B		Y		Cave	57	5%
Golbat	R		B		Y		Cave	54, 59	40%
Parasect	R		B		Y		Cave	64	10%
Graveler	R		B		Y		Cave	55	15%
Electrode	R		B		Y		Cave	55	15%
Marowak	R		B		Y		Cave	55	15%
Lickitung	R		B		Y		Cave	50, 55	5%
Rhyhorn	R		B		Y		Cave	52	10%
Rhydon	R		B		Y		Cave	55	25%
Rhydon	R		B		Y		Cave	62	10%
Chansey	R		B		Y		Cave	64	10%
Chansey	R		B		Y		Cave	56	5%
Ditto	R		B		Y		Cave	63, 65, 67	10%
Ditto	R		B		Y		Cave	60, 65	15%
Fishing
Magikarp	R		B		Y		Fishing Old Rod	5	100%
Poliwag	R		B		Y		Fishing Good Rod	10	50%
Goldeen	R		B		Y		Fishing Good Rod	10	50%
Slowbro	R		B		Y		Fishing Super Rod	23	25%
Kingler	R		B		Y		Fishing Super Rod	23	25%
Seadra	R		B		Y		Fishing Super Rod	23	25%
Goldeen	R		B		Y		Fishing Super Rod	30	40%
Seaking	R		B		Y		Fishing Super Rod	23	25%
Seaking	R		B		Y		Fishing Super Rod	40, 50, 60	60%
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.

Generation III

1F

Pokémon	Games						Location	Levels	Rate
Parasect	FR			LG			Cave	49, 58	25%
Magneton	FR			LG			Cave	49	20%
Golbat	FR			LG			Cave	46, 55	14%
Primeape	FR			LG			Cave	52, 61	11%
Ditto	FR			LG			Cave	52, 61	11%
Machoke	FR			LG			Cave	46	10%
Electrode	FR			LG			Cave	58	5%
Wobbuffet	FR			LG			Cave	55	4%
Surfing
Psyduck	FR			LG			Surfing	30-50	65%
Slowpoke	FR			LG			Surfing	30-50	65%
Golduck	FR			LG			Surfing	40-55	35%
Slowbro	FR			LG			Surfing	40-55	35%
Fishing
Magikarp	FR			LG			Fishing Old Rod	5	100%
Poliwag	FR			LG			Fishing Good Rod	5-15	60%
Goldeen	FR			LG			Fishing Good Rod	5-15	20%
Magikarp	FR			LG			Fishing Good Rod	5-15	20%
Poliwag	FR			LG			Fishing Super Rod	15-25	40%
Poliwhirl	FR			LG			Fishing Super Rod	20-30	40%
Gyarados	FR			LG			Fishing Super Rod	15-25	15%
Psyduck	FR			LG			Fishing Super Rod	15-35	5%
Slowpoke	FR			LG			Fishing Super Rod	15-35	5%
Rock Smash
Geodude	FR			LG			Rock Smash	30-50	65%
Graveler	FR			LG			Rock Smash	40-55	35%
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.

2F

Pokémon	Games						Location	Levels	Rate
Golbat	FR			LG			Cave	49, 58	25%
Machoke	FR			LG			Cave	49	20%
Parasect	FR			LG			Cave	52, 61	14%
Kadabra	FR			LG			Cave	55, 64	11%
Ditto	FR			LG			Cave	55, 64	11%
Magneton	FR			LG			Cave	52	10%
Wobbuffet	FR			LG			Cave	58	5%
Electrode	FR			LG			Cave	61	4%
Rock Smash
Geodude	FR			LG			Rock Smash	35-55	65%
Graveler	FR			LG			Rock Smash	45-60	35%
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.

B1F

Pokémon	Games						Location	Levels	Rate
Kadabra	FR			LG			Cave	58, 67	25%
Ditto	FR			LG			Cave	58, 67	25%
Parasect	FR			LG			Cave	55, 64	14%
Golbat	FR			LG			Cave	52, 61	11%
Machoke	FR			LG			Cave	52	10%
Magneton	FR			LG			Cave	55	10%
Electrode	FR			LG			Cave	64	4%
Wobbuffet	FR			LG			Cave	61	1%
Surfing
Psyduck	FR			LG			Surfing	40-60	65%
Slowpoke	FR			LG			Surfing	40-60	65%
Golduck	FR			LG			Surfing	50-65	35%
Slowbro	FR			LG			Surfing	50-65	35%
Fishing
Magikarp	FR			LG			Fishing Old Rod	5	100%
Poliwag	FR			LG			Fishing Good Rod	5-15	60%
Goldeen	FR			LG			Fishing Good Rod	5-15	20%
Magikarp	FR			LG			Fishing Good Rod	5-15	20%
Poliwag	FR			LG			Fishing Super Rod	15-25	40%
Poliwhirl	FR			LG			Fishing Super Rod	20-30	40%
Gyarados	FR			LG			Fishing Super Rod	15-35	16%
Psyduck	FR			LG			Fishing Super Rod	15-25	4%
Slowpoke	FR			LG			Fishing Super Rod	15-25	4%
Rock Smash
Geodude	FR			LG			Rock Smash	40-60	65%
Graveler	FR			LG			Rock Smash	50-65	35%
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.

Generation IV

1F

Pokémon	Games						Location	Levels	Rate
Electrode	HG			SS			Cave	40	5%
Wobbuffet	HG			SS			Cave	37	5%
Machoke	HG			SS			Cave	39-40	24%	24%	6%
Parasect	HG			SS			Cave	38	20%	20%	10%
Primeape	HG			SS			Cave	38-39	14%	14%	0%
Primeape	HG			SS			Cave	39	0%	0%	4%
Persian	HG			SS			Cave	38-39	14%	14%	0%
Persian	HG			SS			Cave	39	0%	0%	4%
Magneton	HG			SS			Cave	39-40	11%	11%	0%
Magneton	HG			SS			Cave	40	0%	0%	10%
Ditto	HG			SS			Cave	39-40	11%	11%	0%
Ditto	HG			SS			Cave	39	0%	0%	10%
Golbat	HG			SS			Cave	38	10%	10%	0%
Golbat	HG			SS			Cave	38-39	0%	0%	50%
Surfing
Psyduck	HG			SS			Surfing	35-40	90%
Golduck	HG			SS			Surfing	40	10%
Fishing
Magikarp	HG			SS			Fishing Old Rod	10	100%
Poliwag	HG			SS			Fishing Good Rod	20	45%
Goldeen	HG			SS			Fishing Good Rod	20	40%
Magikarp	HG			SS			Fishing Good Rod	20	15%
Poliwag	HG			SS			Fishing Super Rod	40	40%
Poliwhirl	HG			SS			Fishing Super Rod	40	30%
Gyarados	HG			SS			Fishing Super Rod	40	30%
Rock Smash
Geodude	HG			SS			Rock Smash	22-24	80%
Graveler	HG			SS			Rock Smash	26-30	20%
Special Pokémon
Makuhita	HG			SS			Hoenn Sound	39-40	20%
Absol	HG			SS			Hoenn Sound	38	20%
Chingling	HG			SS			Sinnoh Sound	39-40	20%
Bronzor	HG			SS			Sinnoh Sound	38	20%
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.

2F

Pokémon	Games						Location	Levels	Rate
Golbat	HG			SS			Cave	41	10%	10%	0%
Golbat	HG			SS			Cave	41-42	0%	0%	20%
Parasect	HG			SS			Cave	40	20%
Kadabra	HG			SS			Cave	42	20%
Machoke	HG			SS			Cave	39, 41-42	20%	20%	0%
Machoke	HG			SS			Cave	39	0%	0%	10%
Magneton	HG			SS			Cave	41	10%
Electrode	HG			SS			Cave	41	5%
Ditto	HG			SS			Cave	42	10%
Wobbuffet	HG			SS			Cave	42	5%
Fishing
Magikarp	HG			SS			Fishing Old Rod	10	100%
Poliwag	HG			SS			Fishing Good Rod	20	45%
Goldeen	HG			SS			Fishing Good Rod	20	40%
Magikarp	HG			SS			Fishing Good Rod	20	15%
Poliwag	HG			SS			Fishing Super Rod	40	40%
Poliwhirl	HG			SS			Fishing Super Rod	40	30%
Gyarados	HG			SS			Fishing Super Rod	40	30%
Special Pokémon
Makuhita	HG			SS			Hoenn Sound	41-42	20%
Absol	HG			SS			Hoenn Sound	39, 41	20%
Chingling	HG			SS			Sinnoh Sound	41-42	20%
Bronzor	HG			SS			Sinnoh Sound	39, 41	20%
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.

B1F

Pokémon	Games						Location	Levels	Rate
Parasect	HG			SS			Cave	45, 47	25%
Kadabra	HG			SS			Cave	46	20%
Magneton	HG			SS			Cave	45, 47	15%
Golbat	HG			SS			Cave	47	10%
Machoke	HG			SS			Cave	45	10%
Ditto	HG			SS			Cave	45	10%
Electrode	HG			SS			Cave	46	5%
Wobbuffet	HG			SS			Cave	49	5%
Surfing
Psyduck	HG			SS			Surfing	35-40	90%
Golduck	HG			SS			Surfing	40	10%
Fishing
Magikarp	HG			SS			Fishing Old Rod	10	100%
Poliwag	HG			SS			Fishing Good Rod	20	45%
Goldeen	HG			SS			Fishing Good Rod	20	40%
Magikarp	HG			SS			Fishing Good Rod	20	15%
Poliwag	HG			SS			Fishing Super Rod	40	40%
Poliwhirl	HG			SS			Fishing Super Rod	40	30%
Gyarados	HG			SS			Fishing Super Rod	40	30%
Rock Smash
Geodude	HG			SS			Rock Smash	22-24	80%
Graveler	HG			SS			Rock Smash	26-30	20%
Special Pokémon
Makuhita	HG			SS			Hoenn Sound	45	20%
Absol	HG			SS			Hoenn Sound	45, 47	20%
Chingling	HG			SS			Sinnoh Sound	45	20%
Bronzor	HG			SS			Sinnoh Sound	45, 47	20%
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.

Generation VII

1F

Pokémon	Games						Location	Levels	Rate
Zubat	P			E			Cave	51-56	10%
Golbat	P			E			Cave	51-56	15%
Psyduck	P			E			Cave	51-56	5%
Golduck	P			E			Cave	51-56	15%
Geodude	P			E			Cave	51-56	10%
Graveler	P			E			Cave	51-56	15%
Lickitung	P			E			Cave	51-56	10%
Rhyhorn	P			E			Cave	51-56	10%
Rhydon	P			E			Cave	51-56	5%
Ditto	P			E			Cave	51-56	5%
Rare Spawns
Snorlax	P			E			Cave	51-56	-
Sea Skim
Poliwag	P			E			Sea Skim	51-56	45%
Poliwhirl	P			E			Sea Skim	51-56	9%
Poliwrath	P			E			Sea Skim	51-56	1%
Magikarp	P			E			Sea Skim	51-56	45%
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.

2F

Pokémon	Games						Location	Levels	Rate
Zubat	P			E			Cave	51-56	5%
Golbat	P			E			Cave	51-56	20%
Geodude	P			E			Cave	51-56	5%
Graveler	P			E			Cave	51-56	20%
Lickitung	P			E			Cave	51-56	15%
Rhyhorn	P			E			Cave	51-56	10%
Rhydon	P			E			Cave	51-56	10%
Chansey	P			E			Cave	51-56	10%
Ditto	P			E			Cave	51-56	5%
Rare Spawns
Snorlax	P			E			Cave	51-56	-
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.

B1F

Pokémon	Games						Location	Levels	Rate
Zubat	P			E			Cave	51-56	10%
Golbat	P			E			Cave	51-56	15%
Psyduck	P			E			Cave	51-56	5%
Golduck	P			E			Cave	51-56	15%
Geodude	P			E			Cave	51-56	10%
Graveler	P			E			Cave	51-56	15%
Lickitung	P			E			Cave	51-56	10%
Rhyhorn	P			E			Cave	51-56	10%
Rhydon	P			E			Cave	51-56	5%
Ditto	P			E			Cave	51-56	5%
Rare Spawns
Snorlax	P			E			Cave	51-56	-
Sea Skim
Poliwag	P			E			Sea Skim	51-56	45%
Poliwhirl	P			E			Sea Skim	51-56	9%
Poliwrath	P			E			Sea Skim	51-56	1%
Magikarp	P			E			Sea Skim	51-56	45%
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.

Special encounters

Generation I

A Mewtwo appears on B1F on the first visit.

Type: Psychic Unknown Mewtwo Lv.70 Swift Normal   --       Psychic Psychic   --       Barrier Psychic   --       Recover Normal   --

Generation III

A Mewtwo appears on B1F on the first visit. If run from, it respawns after leaving the area.

Type: Psychic Unknown Ability: Pressure Held item: None Mewtwo Lv.70 Swift Normal   --       Recover Normal   --       Safeguard Normal   --       Psychic Psychic   --

Generations IV and VII

A Mewtwo 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!
Type: Psychic Unknown Ability: Pressure Held item: None Mewtwo Lv.70 Psycho Cut Psychic Physical   --       Amnesia Psychic Status   --       Power Swap Psychic Status   --       Guard Swap Psychic Status   --	Type: Psychic Unknown Mega Stone: None Mewtwo Lv.70 Swift Normal Special   --       Amnesia Psychic Status   --       Recover Normal Status   --       Psychic Psychic Special   --

Trainers

Generation VII

Pokémon Trainer Green Cerulean Cave Let's Go, Pikachu! and Let's Go, Eevee! Reward: $19,040

Type: Fairy Unknown Mega Stone: None Clefable♀ Lv.66 Moonblast Fairy Special   --       Light Screen Psychic Status   --       Reflect Psychic Status   --       Tri Attack Normal Special   --       Types: Ghost Poison Mega Stone: None Gengar♂ Lv.66 Dark Pulse Dark Special   --       Shadow Ball Ghost Special   --       Sludge Bomb Poison Special   --       Will-O-Wisp Fire Status   --       Types: Grass Poison Mega Stone: None Victreebel♂ Lv.66 Power Whip Grass Physical   --       Poison Jab Poison Physical   --       Sucker Punch Dark Physical   --       Leech Life Bug Physical   --       Type: Fire Unknown Mega Stone: None Ninetales♀ Lv.66 Fire Blast Fire Special   --       Dark Pulse Dark Special   --       Foul Play Dark Physical   --       Hyper Beam Normal Special   --       Type: Normal Unknown Mega Stone: None Kangaskhan♀ Lv.66 Dizzy Punch Normal Physical   --       Sucker Punch Dark Physical   --       Thunder Punch Electric Physical   --       Brick Break Fighting Physical   --       Type: Water Unknown Mega Stone: Blastoisinite Blastoise♂ Lv.68 Hydro Pump Water Special   --       Flash Cannon Steel Special   --       Ice Beam Ice Special   --       Fake Out Normal Physical   --

Layout

The layout of the cave has been tweaked several times in the past, particularly in Generation I.

In Pokémon FireRed and LeafGreen, it has been restored to the original layout found in Pokémon Red and Green, with the addition of breakable rocks.

In Pokémon HeartGold and SoulSilver, 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 Pokémon Yellow. Breakable rocks are also present and Rock Climb surfaces were added.

Version	1F	2F	B1F
Red (J)
Green
Red
Blue Blue (J)
Yellow
FireRed
LeafGreen
HeartGold
SoulSilver

Preview

• 

  FRLG

• 

  HGSS Morning (Ditto)

• 

  HGSS Day/Evening (Ditto)

• 

  HGSS Night (Magneton)

Artwork

Concept art from the Let's Go, Pikachu and Eevee! Super Music Collection

In animation

Pokémon Origins

Cerulean Cave's entrance in Pokémon Origins

Cerulean Cave's interior in Pokémon Origins

Cerulean Cave appeared in File 4: Charizard. It was first mentioned by Blue, 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 Blastoise was sent flying and crashed on top of him. After he had told Professor Oak and Red about this, Red soon recalled the journals he had found at the Pokémon Mansion at Cinnabar Island, and understood that the mysterious Pokémon was in fact Mewtwo, an artificial Pokémon created by enhancing the powers of Mew.

Wanting to help Professor Oak to complete the Pokédex, Red then headed to Cerulean Cave, where he encountered Mewtwo. Being amazingly strong and durable, Mewtwo was capable of defeating almost all of Red's Pokémon, excluding only his Charizard. 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 in Pokémon Evolutions

Cerulean Cave appeared in The Discovery, where Trace and Green both entered it in order to find and catch Mewtwo. When Trace's Pidgeot was badly hurt by a swarm of Zubat and Golbat, 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 Elaine had managed to catch Mewtwo first, and challenged her to a battle over it. However, despite using her Mega Blastoise, 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 in Pokémon Adventures

Red, Green & Blue arc

Cerulean Cave appeared in And Mewtwo Too?! and And Mewtwo... Three!. Upon hearing from Bill about a monster that had caused massive destruction in the northwest sector of Cerulean City, Red went to investigate Cerulean Cave, where the monster was said to have fled to. Once Red arrived at the cave, he and his Pokémon 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 Rapidash. Blaine explained that the tornado was actually Psywave, a Psychic-type move capable of both attacking and defending at the same time, and the user of the move was Mewtwo, 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 Mew's DNA to complete the Genetic Pokémon, 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.

Cerulean Cave in Pokémon Zensho

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 Satoshi and Shigeru a photo of Mewtwo taken within the cave. The two young Trainers subsequently headed for the 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, Rhydon is only available at the Cerulean Cave in Pokémon Red and Blue, but Rhydon's Pokédex map simply says "Area unknown". Similarly, Golbat 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 Pokédex 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 Language Title Chinese Cantonese 華藍洞窟 Wàhlàahm Duhngfāt Mandarin 華藍洞窟 / 华蓝洞窟 Huálán Dòngkū Czech Ceruleanská jeskyně French Caverne Azurée German Azuria-Höhle Italian Grotta Celeste Korean 블루시티동굴 Blue City Donggul Brazilian Portuguese Caverna de Cerulean Spanish Cueva Celeste Vietnamese Hang động Hanada

Unknown Dungeon Language Title Danish Det Ukendte Tårn* French Canada Grotte Inconnue Europe Grotte Inconnue German Geheimdungeon Italian Grotta Ignota Brazilian Portuguese Calabouço Desconhecido Spanish Mazmorra Rara

References

Kanto
Settlements Pallet Town • Viridian City • Pewter City • Cerulean City • Vermilion City • Lavender Town Celadon City • Saffron City • Fuchsia City • Cinnabar Island • Indigo Plateau Routes 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 • 26 • 27 • 28 Landmarks Professor Oak's Laboratory • Viridian Forest • Diglett's Cave • Pewter Museum of Science • Mt. Moon (Square) • Cerulean Cave Underground Path (Kanto Routes 5–6) • Underground Path (Kanto Routes 7–8) • S.S. Anne • S.S. Aqua • Sea Cottage • Rock Tunnel Power Plant • Cycling Road/Pokémon Road • Team Rocket Hideout • Silph Co. • Magnet Train • Pokémon Tower • Safari Zone/Pal Park GO Park • Seafoam Islands • Pokémon Mansion • Cinnabar Lab • Pokémon League Reception Gate • Victory Road • Tohjo Falls Access to Sevii Islands • Johto

Game locations of Legendary and Mythical Pokémon

Kanto Seafoam Islands • Power Plant • Victory Road • Cerulean Cave Route 10 • Route 25 • Pewter City • Roaming Pokémon Sevii Islands Mt. Ember • Navel Rock • Birth Island Johto Ilex Forest • Bell Tower • Whirl Islands • Mt. Silver Cave Burned Tower • Embedded Tower • Roaming Pokémon Hoenn Desert Ruins • Island Cave • Ancient Tomb • Cave of Origin • Marine Cave Terra Cave • Sky Pillar • Southern Island • Sea Mauville • Scorched Slab Pathless Plain • Nameless Cavern • Fabled Cave • Gnarled Den Trackless Forest • Crescent Isle • Sky • Roaming Pokémon Sinnoh Acuity Cavern • Valor Cavern • Spear Pillar • Turnback Cave Rock Peak Ruins • Iceberg Ruins • Iron Ruins • Snowpoint Temple Stark Mountain • Newmoon Island • Flower Paradise • Hall of Origin Ramanas Park • Floaroma Town • Roaming Pokémon Unova Guidance Chamber • Trial Chamber • Rumination Field • N's Castle • Abundant Shrine Giant Chasm • Dragonspiral Tower • Liberty Garden • Route 11 • Route 13 • Route 22 Route 23 • Celestial Tower • Nacrene City • Underground Ruins • Twist Mountain Dreamyard • Marvelous Bridge • Reversal Mountain • Coastal Biome • Roaming Pokémon Kalos Sea Spirit's Den • Team Flare Secret HQ • Terminus Cave Unknown Dungeon • Roaming Pokémon Alola Route 16 • Altar of the Sunne • Altar of the Moone • Mount Lanakila • Mahalo Trail Ruins of Conflict • Ruins of Life • Ruins of Abundance • Ruins of Hope Aether Paradise • Ancient Poni Path • Lake of the Sunne • Lake of the Moone Ten Carat Hill • Resolution Cave Galar Tower summit • Battle Tower • Master Dojo • Crown Shrine • Max Lair Rock Peak Ruins • Iceberg Ruins • Iron Ruins • Split-Decision Ruins • Giant's Bed Frigid Sea • Lakeside Cave • Ballimere Lake • Freezington • Roaming Pokémon Hisui Seaside Hollow • Temple of Sinnoh • Acuity Cavern • Valor Cavern • Verity Cavern Lava Dome Sanctum • Moonview Arena • Snowpoint Temple • Turnback Cave • Bonechill Wastes Cobalt Coastlands • Ramanas Island • Scarlet Bog • Coronet Highlands • Floaro Gardens Paldea Grasswither Shrine • Icerend Shrine • Groundblight Shrine • Firescourge Shrine Poco Path • Area Zero • Area Zero Underdepths • Glaseado Mountain South Province (Area One) • Asado Desert • West Province (Area One) • East Province (Area Three) Casseroya Lake • North Paldean Sea • South Province (Area Four) • North Province (Area Two) Alfornada Cavern • Great Crater of Paldea • Tagtree Thicket • East Province (Area One) South Province (Area Five) • Dalizapa Passage • Pokémon League • Socarrat Trail Kitakami Paradise Barrens • Wistful Fields • Oni Mountain • Dreaded Den • Loyalty Plaza Other Faraway Island • Distortion World • Sinjoh Ruins • Ultra Space Wilds

This article is part of Project Locations, a Bulbapedia project that aims to write comprehensive articles on every location in the Pokémon world.