Cerulean Cave

Cerulean Cave Unknown Dungeon Unknown Unknown "Wild Missingno. appeared!"
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Map description:	{{{mapdesc}}}
Location:	Northwest of Cerulean City
Region:	Kanto
Generations:	I, III
Location of Cerulean Cave in Kanto.
Pokémon world locations

Cerulean Cave, known as the Unknown Dungeon in Generation I, is a cave located northwest of Cerulean City in Kanto. The cave is home to wide variety of high-level wild Pokémon. Only trainers who compete and win in the Pokémon League at Indigo Plateau may enter due to the potency of the Pokémon in the cave. At the end of the cave lies Mewtwo, the only one of its species in the game. The cave has existed in every Generation with the exception of Generation II, when the cave was sealed off.

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. In Pokémon FireRed and LeafGreen, the layout is true to that of the original Red and Green games, aside from the addition of Rock Smash boulders.

Another addition in FireRed/LeafGreen lies in the fact that trainers are now required to further prove themselves before entering the cave, which is done by completing the quest on Sevii Islands and bringing the Network Machine to operate.

Pokémon

Generation I

American

Name	Games		Location	Levels	Rate
Arbok	R		Floor 1		6%
	R		Basement		4%
Raichu	R	B	Floor 1		6%
	R	B	Basement		12%
Sandslash		B	Floor 1		6%
		B	Basement		4%
Wigglytuff	R	B	Floor 2		8%
Golbat	R	B	Floor 1		16%
Parasect	R	B	Floor 1		6%
	R	B	Basement		12%
Venomoth	R	B	Floor 1		10%
	R	B	Floor 2		20%
Kadabra	R	B	Floor 1		6%
	R	B	Floor 2		8%
Magneton	R	B	Floor 1		16%
Dodrio	R	B	Floor 1		10%
	R	B	Floor 2		20%
Hypno	R	B	Floor 1		18%
Electrode	R	B	Floor 2		12%
	R	B	Basement		14%
Marowak	R	B	Floor 2		12%
	R	B	Basement		18%
Rhydon	R	B	Floor 2		8%
	R	B	Basement		16%
Chansey	R	B	Floor 2		4%
	R	B	Basement		12%
Ditto	R	B	Floor 1		6%
	R	B	Floor 2		8%
	R	B	Basement		12%

Japanese

Name	Games			Location	Levels	Rate
Raticate			B
Arbok	R
Raichu	R	G	B
Sandslash		G	B
Clefable			B
Wigglytuff	R	G	B
Golbat	R	G	B
Parasect	R	G	B
Venomoth	R	G	B
Kadabra	R	G	B
Magneton	R	G	B
Dodrio	R	G	B
Hypno	R	G	B
Electrode	R	G	B
Marowak	R	G	B
Rhydon	R	G	B
Chansey	R	G	B
Ditto	R	G	B

Pokémon Yellow

• Chansey
• Ditto
• Gloom
• Golbat
• Graveler
• Lickitung
• Parasect
• Rhydon
• Rhyhorn
• Sandslash
• Venomoth
• Weepinbell

Pokémon FireRed/LeafGreen

• Ditto
• Electrode
• Golbat
• Kadabra
• Machoke
• Magneton
• Parasect
• Primeape
• Wobbuffet
• Psyduck (Surf, Fishing, FireRed only)
• Golduck (Surf, Fishing, FireRed only)
• Slowpoke (Surf, LeafGreen only)
• Slowbro (Surf, LeafGreen only)
• Geodude (Rock Smash)
• Graveler (Rock Smash)
• Magikarp (Fishing)
• Poliwag (Fishing)
• Poliwhirl (Fishing)
• Goldeen (Fishing)
• Gyarados (Fishing)

Differences among Generations

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

Version	First floor	Second floor	Basement
Red/Green (JP)	File:UnknownDungeon - Green Version 1.PNG	File:UnknownDungeon - Green Version 2.png	File:UnknownDungeon - Green Version 3.PNG
Red (US) Blue	File:UnknownDungeon - Blue Version 1.gif	File:UnknownDungeon - Blue Version 2.gif	File:UnknownDungeon - Blue Version 3.gif
Yellow	File:UnknownDungeon - Yellow Version 1.gif	File:UnknownDungeon - Yellow Version 2.gif	File:UnknownDungeon - Yellow Version 3.gif