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Pokemon Red and Blue Cerulean Cave Completion Walkthrough

Cerulean Cave Completion section for the Pokemon Red and Blue walkthrough with wild Pokemon, trainers, items, hidden items, coordinates, and boss strategy.

By Damodar Sharma Updated June 19, 2026 Walkthrough

Enter Cerulean Cave after becoming Champion, collect its rare encounters and items, and catch Mewtwo. This page is a standalone section for Phase 10: Post-Game + Completion, with source-backed Red/Blue encounter, trainer, item, hidden item, and boss data.

Source maps

Cerulean Cave 1F, Cerulean Cave 2F, and Cerulean Cave B1F.

Wild rows52 Trainers0 Items10

Route plan

Cerulean Cave has the highest wild levels in Red/Blue. Bring Surf, strong balls, status, and an escape plan.

Wild Pokemon

Area / subarea Version Method Pokemon Level Odds Condition / requirement
Cerulean Cave 1FBothTall grass / cave floor Golbat Red and Blue sprite Golbat 4620%Encounter rate 10; no time-of-day split in Red/Blue.
Cerulean Cave 1FBothTall grass / cave floor Hypno Red and Blue sprite Hypno 4620%Encounter rate 10; no time-of-day split in Red/Blue.
Cerulean Cave 1FBothTall grass / cave floor Magneton Red and Blue sprite Magneton 4615%Encounter rate 10; no time-of-day split in Red/Blue.
Cerulean Cave 1FBothTall grass / cave floor Dodrio Red and Blue sprite Dodrio 499.8%Encounter rate 10; no time-of-day split in Red/Blue.
Cerulean Cave 1FBothTall grass / cave floor Venomoth Red and Blue sprite Venomoth 499.8%Encounter rate 10; no time-of-day split in Red/Blue.
Cerulean Cave 1FRedTall grass / cave floor Arbok Red and Blue sprite Arbok 529.8%Encounter rate 10; no time-of-day split in Red/Blue.
Cerulean Cave 1FBothTall grass / cave floor Kadabra Red and Blue sprite Kadabra 495.1%Encounter rate 10; no time-of-day split in Red/Blue.
Cerulean Cave 1FBothTall grass / cave floor Parasect Red and Blue sprite Parasect 525.1%Encounter rate 10; no time-of-day split in Red/Blue.
Cerulean Cave 1FBothTall grass / cave floor Raichu Red and Blue sprite Raichu 534.3%Encounter rate 10; no time-of-day split in Red/Blue.
Cerulean Cave 1FBothTall grass / cave floor Ditto Red and Blue sprite Ditto 531.2%Encounter rate 10; no time-of-day split in Red/Blue.
Cerulean Cave 1FBlueTall grass / cave floor Sandslash Red and Blue sprite Sandslash 529.8%Encounter rate 10; no time-of-day split in Red/Blue.
Cerulean Cave 2FBothTall grass / cave floor Dodrio Red and Blue sprite Dodrio 5120%Encounter rate 15; no time-of-day split in Red/Blue.
Cerulean Cave 2FBothTall grass / cave floor Venomoth Red and Blue sprite Venomoth 5120%Encounter rate 15; no time-of-day split in Red/Blue.
Cerulean Cave 2FBothTall grass / cave floor Kadabra Red and Blue sprite Kadabra 5115%Encounter rate 15; no time-of-day split in Red/Blue.
Cerulean Cave 2FBothTall grass / cave floor Rhydon Red and Blue sprite Rhydon 529.8%Encounter rate 15; no time-of-day split in Red/Blue.
Cerulean Cave 2FBothTall grass / cave floor Marowak Red and Blue sprite Marowak 529.8%Encounter rate 15; no time-of-day split in Red/Blue.
Cerulean Cave 2FBothTall grass / cave floor Electrode Red and Blue sprite Electrode 529.8%Encounter rate 15; no time-of-day split in Red/Blue.
Cerulean Cave 2FBothTall grass / cave floor Chansey Red and Blue sprite Chansey 565.1%Encounter rate 15; no time-of-day split in Red/Blue.
Cerulean Cave 2FBothTall grass / cave floor Wigglytuff Red and Blue sprite Wigglytuff 545.1%Encounter rate 15; no time-of-day split in Red/Blue.
Cerulean Cave 2FBothTall grass / cave floor Ditto Red and Blue sprite Ditto 55-605.5%Encounter rate 15; no time-of-day split in Red/Blue.
Cerulean Cave B1FBothTall grass / cave floor Rhydon Red and Blue sprite Rhydon 5520%Encounter rate 25; no time-of-day split in Red/Blue.
Cerulean Cave B1FBothTall grass / cave floor Marowak Red and Blue sprite Marowak 5520%Encounter rate 25; no time-of-day split in Red/Blue.
Cerulean Cave B1FBothTall grass / cave floor Electrode Red and Blue sprite Electrode 5515%Encounter rate 25; no time-of-day split in Red/Blue.
Cerulean Cave B1FBothTall grass / cave floor Chansey Red and Blue sprite Chansey 649.8%Encounter rate 25; no time-of-day split in Red/Blue.
Cerulean Cave B1FBothTall grass / cave floor Parasect Red and Blue sprite Parasect 649.8%Encounter rate 25; no time-of-day split in Red/Blue.
Cerulean Cave B1FBothTall grass / cave floor Raichu Red and Blue sprite Raichu 649.8%Encounter rate 25; no time-of-day split in Red/Blue.
Cerulean Cave B1FRedTall grass / cave floor Arbok Red and Blue sprite Arbok 575.1%Encounter rate 25; no time-of-day split in Red/Blue.
Cerulean Cave B1FBothTall grass / cave floor Ditto Red and Blue sprite Ditto 63-6711%Encounter rate 25; no time-of-day split in Red/Blue.
Cerulean Cave B1FBlueTall grass / cave floor Sandslash Red and Blue sprite Sandslash 575.1%Encounter rate 25; no time-of-day split in Red/Blue.
Cerulean Cave 1FBothOld Rod Magikarp Red and Blue sprite Magikarp 5100%Any fishable water tile.
Cerulean Cave 1FBothGood Rod Goldeen Red and Blue sprite Goldeen 1050%Any fishable water tile after getting Good Rod.
Cerulean Cave 1FBothGood Rod Poliwag Red and Blue sprite Poliwag 1050%Any fishable water tile after getting Good Rod.
Cerulean Cave 1FBothSuper Rod Slowbro Red and Blue sprite Slowbro 2325%Super Rod group 9.
Cerulean Cave 1FBothSuper Rod Seaking Red and Blue sprite Seaking 2325%Super Rod group 9.
Cerulean Cave 1FBothSuper Rod Kingler Red and Blue sprite Kingler 2325%Super Rod group 9.
Cerulean Cave 1FBothSuper Rod Seadra Red and Blue sprite Seadra 2325%Super Rod group 9.
Cerulean Cave 2FBothOld Rod Magikarp Red and Blue sprite Magikarp 5100%Any fishable water tile.
Cerulean Cave 2FBothGood Rod Goldeen Red and Blue sprite Goldeen 1050%Any fishable water tile after getting Good Rod.
Cerulean Cave 2FBothGood Rod Poliwag Red and Blue sprite Poliwag 1050%Any fishable water tile after getting Good Rod.
Cerulean Cave 2FBothSuper Rod Slowbro Red and Blue sprite Slowbro 2325%Super Rod group 9.
Cerulean Cave 2FBothSuper Rod Seaking Red and Blue sprite Seaking 2325%Super Rod group 9.
Cerulean Cave 2FBothSuper Rod Kingler Red and Blue sprite Kingler 2325%Super Rod group 9.
Cerulean Cave 2FBothSuper Rod Seadra Red and Blue sprite Seadra 2325%Super Rod group 9.
Cerulean Cave B1FBothOld Rod Magikarp Red and Blue sprite Magikarp 5100%Any fishable water tile.
Cerulean Cave B1FBothGood Rod Goldeen Red and Blue sprite Goldeen 1050%Any fishable water tile after getting Good Rod.
Cerulean Cave B1FBothGood Rod Poliwag Red and Blue sprite Poliwag 1050%Any fishable water tile after getting Good Rod.
Cerulean Cave B1FBothSuper Rod Slowbro Red and Blue sprite Slowbro 2325%Super Rod group 9.
Cerulean Cave B1FBothSuper Rod Seaking Red and Blue sprite Seaking 2325%Super Rod group 9.
Cerulean Cave B1FBothSuper Rod Kingler Red and Blue sprite Kingler 2325%Super Rod group 9.
Cerulean Cave B1FBothSuper Rod Seadra Red and Blue sprite Seadra 2325%Super Rod group 9.
Cerulean Cave B1FBothStatic Pokemon Mewtwo Red and Blue sprite Mewtwo 70StaticInteract with the overworld Pokemon.
Cerulean Cave B1FBothStatic legendary Mewtwo Red and Blue sprite Mewtwo 70StaticEnter Cerulean Cave after becoming Champion and reach B1F.

Trainers

No regular trainers are sourced for this section.

Items And Hidden Items

Item Type Area / direction Coordinate Requirement
Full RestoreVisible item ballVisible item ball at (7, 13) in Cerulean Cave 1F.(7, 13)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max ElixerVisible item ballVisible item ball at (19, 3) in Cerulean Cave 1F.(19, 3)Reach this tile; HMs or story flags may be needed for late-game dungeons.
NuggetVisible item ballVisible item ball at (5, 0) in Cerulean Cave 1F.(5, 0)Reach this tile; HMs or story flags may be needed for late-game dungeons.
PP UpVisible item ballVisible item ball at (29, 9) in Cerulean Cave 2F.(29, 9)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Ultra BallVisible item ballVisible item ball at (4, 15) in Cerulean Cave 2F.(4, 15)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Full RestoreVisible item ballVisible item ball at (13, 6) in Cerulean Cave 2F.(13, 6)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Ultra BallVisible item ballVisible item ball at (16, 9) in Cerulean Cave B1F.(16, 9)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Max ReviveVisible item ballVisible item ball at (18, 1) in Cerulean Cave B1F.(18, 1)Reach this tile; HMs or story flags may be needed for late-game dungeons.
Rare CandyHidden itemHidden on the searchable tile at (14, 11) in Cerulean Cave 1F.(14, 11)Press A on the hidden tile or use the Itemfinder nearby.
Ultra BallHidden itemHidden on the searchable tile at (27, 3) in Cerulean Cave B1F.(27, 3)Press A on the hidden tile or use the Itemfinder nearby.

Boss Strategy

Boss / branch Team Reward Danger notes Practical counters
Champion Rival trainer spriteChampion RivalMewtwo capture prep
Mewtwo Red and Blue sprite Mewtwo Lv. 70
Static encounterMewtwo is level 70 with huge Special and Speed.Bring Ultra Balls, status, a sleep/paralysis user, and a Pokemon that can take Psychic without fainting instantly.

Completion Checklist

  • Collect every Cerulean Cave item.
  • Catch rare high-level wild Pokemon.
  • Capture Mewtwo.
  • Verify the wild table's version splits before leaving if you are filling the Pokedex.
  • Use the item rows as a visible-item and hidden-item sweep before moving to the next section.

Sources

  • pret/pokered: wild encounters, trainer parties, trainer money, map object events, hidden event items, rods, trades, and prize Pokemon.
  • Encounter odds aggregate the Gen I ten-slot rates: 51/256, 51/256, 39/256, 25/256, 25/256, 25/256, 13/256, 13/256, 11/256, and 3/256.
  • Red/Blue has no day/night encounter column; tables use Version, Method, and Condition instead.

Related articles

Pokemon Red and Blue Walkthrough HubPhase 10: Post-Game + CompletionPrevious: Indigo Plateau Elite Four and ChampionNext: Version, Trade, Fossil, and Prize Cleanup