Cerulean Cave

Cerulean Cave first floor as seen in P3D

Mewtwo inside Cerulean Cave

Cerulean Cave is a cave located in the northwest corner of Cerulean City in Kanto, it is a part of the main storyline and can be accessed after defeating Team Rocket on Chrono Island.

Cerulean Cave is home to a wide variety of high-level wild Pokémon. The legendary Pokémon Mewtwo inhabits the deepest part of the cave.

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 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 powerful trainers 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.

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 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 to the underground lake on the basement floor, which will lead them straight to a dead end and to Mewtwo.

Story events

After the events at the Rocket Warehouse on Chrono Island, Rocket Boss Proton leads his grunts in invading the cave seeking to capture Mewtwo using the Master Ball stolen from Lorelei. When the player arrives they have already mostly made it to the bottom floor. Looker requests the assistance of the player in stopping and arresting them. On the bottom floor of the cave many grunts must be defeated to make it to Proton (one grunt will mistake the player for another grunt and heal their Pokémon on request). When the player arrives Proton has just succeeded in capturing Mewtwo and will challenge the player to a battle. He will battle twice, the first time with only Mewtwo, the second time with the rest of his team too. Once he is defeated he will attempt to flee only to be stopped and arrested by Looker.

Items

Image	Name	Description	Location
1F
	Hyper Potion	A spray-type medicine for treating wounds. It can be used to restore 200 HP to an injured Pokémon.	In the wall behind several smashable rocks. (Hidden)
	Revive	A medicine that can revive fainted Pokémon. It also restores half of a fainted Pokémon's HP.	On a rock in the low section near the center of the cave. (Hidden)
	Nugget	A nugget of the purest gold that gives off a lustrous gleam in direct light. It can be sold at a high price to shops.	Directly west of one of the ladders in the north west of the cave, just north of some stairs from the water.
	Full Restore	A medicine that can be used to fully restore the HP of a single Pokémon and heal any status conditions it has.	On a rock along the south wall near the west side. (Hidden)
	Max Elixir	This medicine can fully restore the PP of all of the moves that have been learned by a Pokémon.	On a raised section in the east side of the cave, reached by a bridge.
	Sea Incense	An item to be held by a Pokémon. This incense has a curious aroma that boosts the power of Water-type moves.	Next to a rock along the very northernmost wall of the cave.
	Rare Candy	A candy that is packed with energy. When consumed, it will instantly raise the level of a single Pokémon by one.	On a rock in the very south easternmost corner of the cave on the high sections along the wall. (Hidden)
2F
	TM 99	Teaches "Shock Wave" to a Pokémon	Past some smash rocks on a small path from the north east ladder.
	Zinc	A nutritious drink for Pokémon. When consumed, it raises the base Sp. Def stat of a single Pokémon.	On the ground in the large open area on the east side. (Hidden)
	Big Pearl	A rather large pearl that has a very nice silvery sheen. It can be sold to shops for a high price.	On the ground in the large open area on the east side. (Hidden)
	Odd Incense	An item to be held by a Pokémon. This exotic-smelling incense boosts the power of Psychic-type moves.	At the end of a long path from the ladder in the center of the map. Left, left, left, rock smash
	Full Heal	A spray-type medicine that is broadly effective. It can be used once to heal all the status conditions of a Pokémon.	On the ground in the large open area on the east side. (Hidden)
	Ultra Ball	An ultra-high performance Pokéball that provides a higher success rate for catching Pokémon than a Great Ball.	In a small area split off from a long path from the ladder in the center of the map. Left, right, left, right (Hidden)
	PP Up	A medicine that can slightly raise the maximum PP of a single move that has been learned by the target Pokémon.	In a small area at the end of a long path from the western most ladder.
	Protein	A nutritious drink for Pokémon. When consumed, it raises the base Attack stat of a single Pokémon.	On a rock at the end of a long path from the ladder in the center of the map. Left, right, left, strait, rock smash (Hidden)
	Ultra Ball	An ultra-high performance Pokéball that provides a higher success rate for catching Pokémon than a Great Ball.	On the ground in the large open area on the east side. (Hidden)
B1F
	Black Sludge	A held item that gradually restores the HP of Poison-type Pokémon. It inflicts damage on all other types.	In the far south eastern corner of the cave.
	Nugget	A nugget of the purest gold that gives off a lustrous gleam in direct light. It can be sold at a high price to shops.	On a rock behind a smash rock in the middle of the north side of the map. (Hidden)
	Ultra Ball	An ultra-high performance Pokéball that provides a higher success rate for catching Pokémon than a Great Ball.	In a small area behind some smash rocks in the middle of the cave. (Hidden)
	Dusk Stone	A peculiar stone that makes certain species of Pokémon evolve. It is as dark as dark can be.	At the end of a small path below some rock climb walls near the center of the map.
	Max Revive	A medicine that can revive fainted Pokémon. It also fully restores a fainted Pokémon's maximum HP.	Along the north wall at the end of a narrow raised path.
	TM 83	Teaches "Psywave" to a Pokémon	In the north east corner of the map up some rock climb walls.
	Max Revive	A medicine that can revive fainted Pokémon. It also fully restores a fainted Pokémon's maximum HP.	Behind some rocks near the north west. (Hidden)
	Ultra Ball	An ultra-high performance Pokéball that provides a higher success rate for catching Pokémon than a Great Ball.	On the top of the raised section in the south west with stairs and 2 rock climb walls.
	Polkadot Bow	A pink bow. A certain Pokémon likes this item.	Behind Mewtwo and the ladder.
	Mewtwonite X	One variety of the mysterious Mega Stones. Have Mewtwo hold it, and this stone will enable it to Mega Evolve during battle.	To the east of where Mewtwo can be found.

Pokémon

1F

Unless stated otherwise, all levels in this chart are of Difficulty 0.

Pokémon	Location	Levels	Rate Morning	Rate Day	Rate Evening	Rate Night
Parasect	Cave Floor	49-58	25%	25%	25%	25%
Magneton	Cave Floor	49	20%	20%	20%	20%
Golbat	Cave Floor	46-55	14%	14%	14%	14%
Primeape	Cave Floor	52-61	11%	11%	11%	11%
Ditto	Cave Floor	52-61	11%	11%	11%	11%
Machoke	Cave Floor	46	10%	10%	10%	10%
Electrode	Cave Floor	58	5%	5%	5%	5%
Wobbuffet	Cave Floor	55	4%	4%	4%	4%
Surfing
Psyduck	Surf	35-50	35%	35%	35%	35%
Golduck	Surf	40-55	15%	15%	15%	15%
Slowpoke	Surf	35-50	35%	35%	35%	35%
Slowbro	Surf	40-55	15%	15%	15%	15%
Fishing
Magikarp	Old Rod	10	100%	100%	100%	100%
Magikarp	Good Rod	20	20%	20%	20%	20%
Goldeen	Good Rod	20	20%	20%	20%	20%
Poliwag	Good Rod	20	60%	60%	60%	60%
Poliwag	Super Rod	40	40%	40%	40%	40%
Poliwhirl	Super Rod	40	40%	40%	40%	40%
Slowpoke	Super Rod	40	3%	3%	3%	3%
Psyduck	Super Rod	40	3%	3%	3%	3%
Gyarados	Super Rod	40	14%	14%	14%	14%
Rock Smash
Geodude	Rock Smash	30-50	65%	65%	65%	65%
Graveler	Rock Smash	40-55	35%	35%	35%	35%

2F

Unless stated otherwise, all levels in this chart are of Difficulty 0.

Pokémon	Location	Levels	Rate Morning	Rate Day	Rate Evening	Rate Night
Golbat	Cave Floor	49-58	25%	25%	25%	25%
Machoke	Cave Floor	49	20%	20%	20%	20%
Parasect	Cave Floor	52-61	14%	14%	14%	14%
Kadabra	Cave Floor	55-64	11%	11%	11%	11%
Ditto	Cave Floor	55-64	11%	11%	11%	11%
Magneton	Cave Floor	52	10%	10%	10%	10%
Wobbuffet	Cave Floor	58	5%	5%	5%	5%
Electrode	Cave Floor	61	4%	4%	4%	4%
Rock Smash
Geodude	Rock Smash	30-50	65%	65%	65%	65%
Graveler	Rock Smash	40-60	35%	35%	35%	35%

B1F

Unless stated otherwise, all levels in this chart are of Difficulty 0.

Pokémon	Location	Levels	Rate Morning	Rate Day	Rate Evening	Rate Night
Mewtwo	Legendary Encounter	75	One
Kadabra	Cave Floor	58-67	25%	25%	25%	25%
Ditto	Cave Floor	58-67	25%	25%	25%	25%
Parasect	Cave Floor	55-64	14%	14%	14%	14%
Golbat	Cave Floor	52-61	11%	11%	11%	11%
Machoke	Cave Floor	52-61	10%	10%	10%	10%
Magneton	Cave Floor	55	10%	10%	10%	10%
Electrode	Cave Floor	64	4%	4%	4%	4%
Wobbuffet	Cave Floor	61	1%	1%	1%	1%
Surfing
Psyduck	Surf	40-60	35%	35%	35%	35%
Golduck	Surf	50-65	15%	15%	15%	15%
Slowpoke	Surf	40-60	35%	35%	35%	35%
Slowbro	Surf	50-65	15%	15%	15%	15%
Fishing
Magikarp	Old Rod	10	100%	100%	100%	100%
Magikarp	Good Rod	20	20%	20%	20%	20%
Goldeen	Good Rod	20	20%	20%	20%	20%
Poliwag	Good Rod	20	60%	60%	60%	60%
Poliwag	Super Rod	40	40%	40%	40%	40%
Poliwhirl	Super Rod	40	40%	40%	40%	40%
Slowpoke	Super Rod	40	3%	3%	3%	3%
Psyduck	Super Rod	40	3%	3%	3%	3%
Gyarados	Super Rod	40	14%	14%	14%	14%
Rock Smash
Geodude	Rock Smash	40-60	65%	65%	65%	65%
Graveler	Rock Smash	50-65	35%	35%	35%	35%

Trainers

Unless stated otherwise, all levels in this chart are of Difficulty 0.

Label	Name	Pokémon	Reward
A	Team Rocket Grunt♀	Drowzee Lv.51 Hypno Lv.52 Medicham Lv.54	2160
B	Team Rocket Grunt♀	Cubone Lv.51 Marowak Lv.52 Krookodile Lv.54	2160
C	Team Rocket Grunt♂	Grimer Lv.51 Muk Lv.52 Mightyena Lv.54	2160
D	Team Rocket Grunt♂	Machop Lv.51 Machoke Lv.52 Hariyama Lv.54	2160
E	Team Rocket Grunt♀	Houndour Lv.51 Houndoom Lv.52 Zweilous Lv.54	2160
F	Team Rocket Grunt♂	Hypno Lv.51 Hypno Lv.52 Shiftry Lv.54	2160
G	Team Rocket Grunt♀	Muk Lv.55 Seviper Lv.55 Vileplume Lv.57	2000
H	Team Rocket Grunt♂	Weezing Lv.55 Houndoom Lv.55 Zoroark Lv.57	2000
I	Rocket Boss Proton	Mewtwo Lv.70	7230
I	Rocket Boss Proton	Crobat Lv.55 Weezing Lv.54 Noivern Lv.57 Seviper Lv.56 Gliscor Lv.58 Mewtwo Lv.70	10540