HeartGold & SoulSilver Cerulean Cave
Sealed for years, this lake-cave northwest of Cerulean has finally reopened. Only sixteen badges get you in. Mewtwo waits in the dark at the bottom, the strongest catch in either region.
Cerulean Cave is in Kanto, with its entrance in Cerulean City. In the story it comes after Mt. Silver and before Silph Co..
CERULEAN CAVE MAP
Cerulean Cave reopens only once the Kanto badges are won, three floors crossed by Surf, climbed with Rock Climb, and cleared with Rock Smash.
Cerulean Cave Walkthrough
1F
- Walk north from the entrance to the water, then surf west across the whole lake to the far shore.
- Take the NuggetNuggetA nugget of pure gold that gives off a lustrous gleam. It can be sold at a high price to shops.1F, near the northwest corner near the northwest corner of 1F, then pick up the Full RestoreFull RestoreA medicine that fully restores the HP and heals any status problems of a single Pokemon. along the south wall on your way to the eastern stairs.
Nugget2F
- Up the eastern stairs, search the large open area on the east side for the hidden ZincZincA nutritious drink for Pokemon. It raises the base Sp. Def (Special Defense) stat of a single Pokemon.2F, in the large open area on the east side (hidden), PP Up and Big Pearl, then head back down.
- Walk west to the central stairs and climb into the 2F maze, where Rock SmashMoveRock SmashFightingClassPhysicalPower40Accuracy100%PP15The user hits with a punch that may lower the target’s Defense. It can also smash cracked boulders. opens the way to the hidden Protein near the northwest corner.
- The Odd Incense near the center also requires Rock SmashMoveRock SmashFightingClassPhysicalPower40Accuracy100%PP15The user hits with a punch that may lower the target’s Defense. It can also smash cracked boulders., and the maze ends at stairs in its northwest corner that drop you on a walled 1F ledge.
Zinc
PP Up
Odd IncenseB1F
- From that ledge, take the stairs down to B1F, then scale the rock wall south of them to the Dusk Stone in the center, which requires Rock ClimbMoveRock ClimbNormalClassPhysicalPower90Accuracy85%PP20A charging attack that may also leave the foe confused. It can also be used to scale rocky walls..
- SurfMoveSurfWaterClassSpecialPower95Accuracy100%PP15It swamps the entire battlefield with a giant wave. It can also be used for crossing water. north across the first lake and smash the lone rock northeast of the rocks in the center of B1F for a hidden Nugget.
- Scale the walls to the northeast corner for the Electirizer, which requires Rock ClimbMoveRock ClimbNormalClassPhysicalPower90Accuracy85%PP20A charging attack that may also leave the foe confused. It can also be used to scale rocky walls., then surf the second lake south to the Black SludgeMoveSludgePoisonClassSpecialPower65Accuracy100%PP20Unsanitary sludge is hurled at the foe. It may also poison the target..
- SurfMoveSurfWaterClassSpecialPower95Accuracy100%PP15It swamps the entire battlefield with a giant wave. It can also be used for crossing water. back north and face Mewtwo, which stands just south of the east stairs.
Dusk StoneNugget
Electirizer
Requires HM08 Rock ClimbMoveRock ClimbNormalClassPhysicalPower90Accuracy85%PP20A charging attack that may also leave the foe confused. It can also be used to scale rocky walls. + Earth Badge
1F
- Walk south off the ledge to the water, then surf north along the east side of the lake.
- Land below the stairs in the northeast corner of 1F and climb them to the last sealed corner of 2F.
2F
- Smash the rocks in this northeast corner to take TM24 ThunderboltTMTM24 ThunderboltElectricClassSpecialPower95Accuracy100%PP15A strong electric blast is loosed at the foe. It may also leave the foe paralyzed.Where2F, northeast corner (requires Surf and Rock Smash), which requires SurfMoveSurfWaterClassSpecialPower95Accuracy100%PP15It swamps the entire battlefield with a giant wave. It can also be used for crossing water. and Rock SmashMoveRock SmashFightingClassPhysicalPower40Accuracy100%PP15The user hits with a punch that may lower the target’s Defense. It can also smash cracked boulders..
- Take the same stairs back down, surf south to the entrance and leave for Cerulean City.
TM24 ThunderboltPokemon Encounters
Mewtwo waits at the bottom at level 70, the strongest catch in either region and the reason to clear this cave. The wild floors run Electrode, Magneton, and a HeartGold Primeape or SoulSilver Persian at 4 percent, with Wobbuffet climbing to level 49 in the depths.
Old Rod1
Good Rod5
Super Rod4
Old Rod1Good Rod5Super Rod4Old Rod1Good Rod5Super Rod4Mewtwo
ITEMS
Mewtwo's cave rewards the trek with a Dusk Stone and an Electirizer, the trade item that turns Electabuzz into Electivire. TM24 Thunderbolt is a strong Electric pickup, with a Black Sludge for Poison-types and hidden treasures along the back walls.
TM24 Thunderbolt
Thunderbolt deals damage and has a 10% chance of paralyzing the target.
TM24 Thunderbolt
Thunderbolt deals damage and has a 10% chance of paralyzing the target.
Rare Candy
A candy that is packed with energy. It raises the level of a single Pokemon by one.
PP Up
It slightly raises the maximum PP of a selected move that has been learned by the target Pokemon.
PP Up
It slightly raises the maximum PP of a selected move that has been learned by the target Pokemon.
Protein
A nutritious drink for Pokemon. It raises the base Attack stat of a single Pokemon.
Zinc
A nutritious drink for Pokemon. It raises the base Sp. Def (Special Defense) stat of a single Pokemon.
Max Ether
It fully restores the PP of a single selected move that has been learned by the target Pokemon.
Red Shard
A small red shard. It appears to be from some sort of implement made long ago.
Revive
A medicine that revives a fainted Pokemon. It restores half the Pokemon's maximum HP.
Star Piece
A shard of a pretty gem that sparkles in a red color. It can be sold at a high price to shops.
Full Restore
A medicine that fully restores the HP and heals any status problems of a single Pokemon.
Max Elixir
It fully restores the PP of all the moves learned by the targeted Pokemon.
Nugget
A nugget of pure gold that gives off a lustrous gleam. It can be sold at a high price to shops.
Sea Incense
An item to be held by a Pokemon. It is incense with a curious aroma that boosts the power of Water-type moves.
Odd Incense
An item to be held by a Pokemon. It is an exotic-smelling incense that boosts the power of Psychic-type moves.
Black Sludge
A held item that gradually restores the HP of Poison-type Pokemon. It inflicts damage on all other types.
Dusk Stone
Evolves a Murkrow into Honchkrow or a Misdreavus into Mismagius.
Electirizer
A box packed with a tremendous amount of electric energy. It is loved by a certain Pokemon.
Max Revive
A medicine that revives a fainted Pokemon. It fully restores the Pokemon's HP.
Ultra Ball
An ultra-performance Ball that provides a higher Pokemon catch rate than a Great Ball.
Hyper Potion
A spray-type medicine for wounds. It restores the HP of one Pokemon by 200 points.
Revive
A medicine that revives a fainted Pokemon. It restores half the Pokemon's maximum HP.
Big Pearl
A quite-large pearl that sparkles in a pretty silver color. It can be sold at a high price to shops.
Full Heal
A spray-type medicine. It heals all the status problems of a single Pokemon.
Max Revive
A medicine that revives a fainted Pokemon. It fully restores the Pokemon's HP.
Nugget
A nugget of pure gold that gives off a lustrous gleam. It can be sold at a high price to shops.
Cerulean Cave Guide
Cerulean Cave had collapsed and was sealed off in Gold, Silver, and Crystal, but HGSS reopened it and put Mewtwo back inside at Level 70. You need all 16 Badges and a trip through the Hall of Fame before the cave opens, then Surf, Rock Smash, Rock Climb, and Flash to work your way down to it. If you knock Mewtwo out or run off, beating the Pokemon League a second time puts it back at the bottom.