Cerulean Cave

Cerulean Cave - Kanto

Overviewing collage Cerulean Cave 1F Cerulean Cave 2F Cerulean Cave B1F

Location A positional vantage point of Cerulean Cave in Kanto.

Resources Battleable NPCs 5 Ground-lootable items 24 Berry trees 0

Cerulean Cave is a Kanto cave located on the outskirts Cerulean City. The entrance is north-east of the city, reachable from the waterway on Route 24.

As one of the end-game training areas, it is only made accessible upon completing the Cerulean Cave quest. This requires access to both Kanto and Johto, and therefore will not be accessible until completing all the Gyms in these regions. A guard will blocked the entrance to the cave until the quest is completed.

The cave is considered the most potent training area in PRO with predominantly evolved-stage Pokemon with levels in the high-50s and low-60s. It also houses the highest-leveled NPC trainers known, thereby richening the experience-points payouts that are attainable from this area.

Notable miscellanies

Naero

Main article: Naero

Naero is challengable on the basement floor of this cave. He cools down after 12 days; that duration is halved to 6 days with active membership.

Defeating him will reap access to all Daycare centers in PRO; by virtue of this access, you will also have tuteeship access to Egg Moves, since the Egg Moves-tutors are stationed in each of them.

Naero also multitudinously rewards baby-stage Pokémon each time he is defeated.

Mewtwo

An overworld-interactable Mewtwo inhabits the basement floor.

While this Mewtwo is not catchable, you will automatically register its seen-data entry in your Pokédex by battling it; this is needed for the Mew quest, which stipulates that 150 seen-data entries of Generation I Pokémon is needed in order to access Mew's inhabiting island, including Mewtwo's.

If you have battled this Mewtwo yet have lost its seen-data entry, you can use the restitutionary machine in Professor Oak's lab in Pallet Town in order to recover it.

PP Up-vendor

On the second floor, a PP Up-vendor will sell you the item for 15,000 apiece for up to 5 times per day.

Wild Pokémon

1F

Land

Spawn Information Temporarily Unavailable

Since 17 July 2026, the public Spawn Dump Page has been temporarily disabled and will remain unavailable for an indefinite period.

Because the Pokémon Revolution Online Wiki relied on this data source, it is currently unable to display spawn locations.

For the time being, please rely on the in-game spawn information instead. Spawn information will return once a public data source becomes available again.

Water

Surfing

Spawn Information Temporarily Unavailable

Since 17 July 2026, the public Spawn Dump Page has been temporarily disabled and will remain unavailable for an indefinite period.

Because the Pokémon Revolution Online Wiki relied on this data source, it is currently unable to display spawn locations.

For the time being, please rely on the in-game spawn information instead. Spawn information will return once a public data source becomes available again.

Fishing

Spawn Information Temporarily Unavailable

Since 17 July 2026, the public Spawn Dump Page has been temporarily disabled and will remain unavailable for an indefinite period.

Because the Pokémon Revolution Online Wiki relied on this data source, it is currently unable to display spawn locations.

For the time being, please rely on the in-game spawn information instead. Spawn information will return once a public data source becomes available again.

2F

Spawn Information Temporarily Unavailable

Since 17 July 2026, the public Spawn Dump Page has been temporarily disabled and will remain unavailable for an indefinite period.

Because the Pokémon Revolution Online Wiki relied on this data source, it is currently unable to display spawn locations.

For the time being, please rely on the in-game spawn information instead. Spawn information will return once a public data source becomes available again.

B1F

Land

Spawn Information Temporarily Unavailable

Since 17 July 2026, the public Spawn Dump Page has been temporarily disabled and will remain unavailable for an indefinite period.

Because the Pokémon Revolution Online Wiki relied on this data source, it is currently unable to display spawn locations.

For the time being, please rely on the in-game spawn information instead. Spawn information will return once a public data source becomes available again.

Water

Surfing

Spawn Information Temporarily Unavailable

Since 17 July 2026, the public Spawn Dump Page has been temporarily disabled and will remain unavailable for an indefinite period.

Because the Pokémon Revolution Online Wiki relied on this data source, it is currently unable to display spawn locations.

For the time being, please rely on the in-game spawn information instead. Spawn information will return once a public data source becomes available again.

Fishing

Spawn Information Temporarily Unavailable

Since 17 July 2026, the public Spawn Dump Page has been temporarily disabled and will remain unavailable for an indefinite period.

Because the Pokémon Revolution Online Wiki relied on this data source, it is currently unable to display spawn locations.

For the time being, please rely on the in-game spawn information instead. Spawn information will return once a public data source becomes available again.

Items

1F

Item		Quantity	Cooldown	Location
	Rare Candy	1	14 days	Hidden item. Shrouded under the large crystallic rocks slightly north-east of the entrance
	Revive	1	Not respawnable	Hidden item. On the first small crystallic rock east of the south end of the bridge
	Full Restore	1	Not respawnable	Hidden item. Between the two southmost rows of crystallic rocks
	Hyper Potion	1	Not respawnable	Hidden item. Enclosed in the Rock smash rocks in the southwest corner
	Nugget	1	19 days	In the north-west corner of the floor, next to the closest ladder to the water exit
	Sea Incense	1	Not respawnable	At the end of the path following the north-west exit of the bridge
	Max Elixir	1	Not respawnable	On the mountainside east of the bridge's trisection

2F

Item		Quantity	Cooldown	Location
	Ultra Ball	1	Not respawnable	In the middle-west part, at the end of the path from taking the westmost ladder
	PP Up	1	Not respawnable	Hidden item. On the isolated crystallic rock at the end of the opposite path to the PP seller
	Odd Incense	1	Not respawnable	At the end of the path east from the middle-southmost path
	Full Heal	1	Not respawnable	Hidden item. At the end of the mini-path directly north of the south-eastmost ladder
	Zinc	1	Not respawnable	Hidden item. At the north-east end of the path from the south-eastmost ladder
	Ultra Ball	1	Not respawnable	Hidden item. At the north-west end of the path from the south-eastmost ladder
	PP Up	1	Not respawnable	At the end of the path that extends from the westmost path
	TM24 - Thunderbolt	1	Not respawnable	At the end of the path from the north-eastmost ladder. Requires Rock Smash
	Protein	1	Not respawnable	Hidden item. Behind the westmost crystallic rock near the north-westmost ladder

B1F

Item		Quantity	Cooldown	Location
	Max Potion	1	12 days	Hidden item. Cornered by two Rock Smash rocks immediately north-east from the westmost ladder
	Ultra Ball	1	Not respawnable	In the west side along the staircase path south of the westmost ladder
	Dusk Stone	1	Not respawnable	At the end of a narrow horizontal path south-east from the westmost ladder
	Revive	1-3	Not respawnable	At the end of the north-east path from the westmost ladder
	Ultra Ball	1	Not respawnable	Hidden item. At the end of the path that follows west from exitting the water in the middle of the floor. Requires Rock Smash
	Nugget	1	Not respawnable	Hidden item. On the only crystallic rock blocked by a Rock Smash rock in the middle north of the floor)
	Black Sludge	1	Not respawnable	In the south-east corner of the floor
	Electirizer	1	Not respawnable	In the north-east corner of the floor

NPC Battlables

2F

Cerulean Cave 2F Trainers

Old Man Trevor Omastar Lv. 85 Kabutops Lv. 86 Aerodactyl Lv. 87

Lass Lara Venusaur Lv. 90 Charizard Lv. 90 Blastoise Lv. 90

Hiker John Ledian Lv. 86 Crobat Lv. 87 Noctowl Lv. 87

Nurse Joy Happiny Lv. 95 Chansey Lv. 95 Blissey Lv. 95

Lass Janette Vaporeon Lv. 90 Jolteon Lv. 90 Flareon Lv. 90 Espeon Lv. 90 Umbreon Lv. 90 Eevee Lv. 90

All NPCs cool down after 7 days unless noted contrariwise. All NPCs may have new Pokémons, or higher level Pokémons upon rematch unless noted contrariwise.

B1F

Naero

Naero can be found in the North-east quarter of Cerulean Cave B2F walking around. Upon interaction Naero will ask to battle the player. His lineup can seen below and more can be read about this Boss on the his main article.

Main article: Naero

Lineup

Easy

Naero's Lineup
Togekiss Nature Ability Item Timid Serene Grace None Move Type Category Base Power Accuracy Air Slash Flying Special 75 95 Shadow Ball Ghost Special 80 100 Extreme Speed Normal Physical 80 100 Psychic Psychic Special 90 100	Snorlax Nature Ability Item Adamant Thick Fat None Move Type Category Base Power Accuracy Crunch Dark Physical 80 100 Body Slam Normal Physical 80 100 Rest Psychic Status — — Sleep Talk Normal Status — —
Mr. Mime Nature Ability Item Modest Filter None Move Type Category Base Power Accuracy Shadow Ball Ghost Special 80 100 Confuse Ray Ghost Status — 100 Icy Wind Ice Special 55 95 Psychic Psychic Special 90 100	Blissey Nature Ability Item Bold Natural Cure None Move Type Category Base Power Accuracy Seismic Toss Fighting Physical — 100 Flamethrower Fire Special 90 100 Soft-Boiled Normal Status — — Thunder Wave Electric Status — 100
Electivire Nature Ability Item Adamant Vital Spirit None Move Type Category Base Power Accuracy Thunder Punch Electric Physical 75 100 Flamethrower Fire Special 90 100 Cross Chop Fighting Physical 100 80 Ice Punch Ice Physical 75 100	Magmortar Nature Ability Item Rash Flame Body None Move Type Category Base Power Accuracy Focus Blast Fighting Special 120 70 Lava Plume Fire Special 80 100 Earthquake Ground Physical 100 100 Thunderbolt Electric Special 90 100
Emboldened moves avail from a STAB bonus when deployed by that Pokémon. Italicized moves are functionally broken; see their individualized pages for more information.

Medium/Hard

Naero's Lineup
Togekiss Nature Ability Item Timid Serene Grace Sitrus Berry Move Type Category Base Power Accuracy Air Slash Flying Special 75 95 Flamethrower Fire Special 90 100 Aura Sphere Fighting Special 80 — Dazzling Gleam Fairy Special 80 100	Snorlax Nature Ability Item Adamant Thick Fat Leftovers Move Type Category Base Power Accuracy Crunch Dark Physical 80 100 Body Slam Normal Physical 80 100 Fire Punch Fire Physical 75 100 Earthquake Ground Physical 100 100
Mr. Mime Nature Ability Item Modest Filter Focus Sash Move Type Category Base Power Accuracy Psychic Psychic Special 90 100 Focus Blast Fighting Special 120 70 Dazzling Gleam Fairy Special 80 100 Shadow Ball Ghost Special 80 100	Blissey Nature Ability Item Bold Natural Cure Leftovers Move Type Category Base Power Accuracy Toxic Poison Status — 90 Soft-Boiled Normal Status — — Seismic Toss Fighting Physical — 100 Wish Normal Status — —
Electivire Nature Ability Item Adamant Vital Spirit Life Orb Move Type Category Base Power Accuracy Wild Charge Electric Physical 90 100 Fire Punch Fire Physical 75 100 Cross Chop Fighting Physical 100 80 Ice Punch Ice Physical 75 100	Magmortar Nature Ability Item Rash Flame Body Life Orb Move Type Category Base Power Accuracy Fire Blast Fire Special 110 85 Earthquake Ground Physical 100 100 Thunderbolt Electric Special 90 100 Focus Blast Fighting Special 120 70
Emboldened moves avail from a STAB bonus when deployed by that Pokémon. Italicized moves are functionally broken; see their individualized pages for more information.

Mewtwo

Mewtwo Move Type Category Base Power Accuracy Thunderbolt Electric Special 90 100 Psychic Psychic Special 90 100 Ice Beam Ice Special 90 100 Blizzard Ice Special 110 70