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Cerulean Cave

Location, Kanto

Cerulean Cave: 46 species in 6 games

Red and Green (Japan)Red and Blue Yellow FireRed and LeafGreen HeartGold and SoulSilver Let's Go, Pikachu and Eevee

Area 1 of 3

Cerulean Cave (1F): 42 species across 11 versions

Red and Green (Japan): 17 species
Species	Method	Levels	Chance	Game page
Arbok	Walking in tall grass or a cave	52	10%	All places
Raichu	Walking in tall grass or a cave	53	4%	All places
Golbat	Walking in tall grass or a cave	46	20%	All places
Parasect	Walking in tall grass or a cave	52	5%	All places
Venomoth	Walking in tall grass or a cave	49	10%	All places
Poliwag	Fishing with a good rod	10	50%	All places
Kadabra	Walking in tall grass or a cave	49	5%	All places
Slowbro	Fishing with a super rod	23	25%	All places
Magneton	Walking in tall grass or a cave	46	15%	All places
Dodrio	Walking in tall grass or a cave	49	10%	All places
Hypno	Walking in tall grass or a cave	46	20%	All places
Kingler	Fishing with a super rod	23	25%	All places
Seadra	Fishing with a super rod	23	25%	All places
Goldeen	Fishing with a good rod	10	50%	All places
Seaking	Fishing with a super rod	23	25%	All places
Magikarp	Fishing with an old rod	5	100%	All places
Ditto	Walking in tall grass or a cave	53	1%	All places

Red and Blue: 17 species
Species	Method	Levels	Chance	Game page
Arbok	Walking in tall grass or a cave	52	10%	All places
Raichu	Walking in tall grass or a cave	53	4%	All places
Golbat	Walking in tall grass or a cave	46	20%	All places
Parasect	Walking in tall grass or a cave	52	5%	All places
Venomoth	Walking in tall grass or a cave	49	10%	All places
Poliwag	Fishing with a good rod	10	50%	All places
Kadabra	Walking in tall grass or a cave	49	5%	All places
Slowbro	Fishing with a super rod	23	25%	All places
Magneton	Walking in tall grass or a cave	46	15%	All places
Dodrio	Walking in tall grass or a cave	49	10%	All places
Hypno	Walking in tall grass or a cave	46	20%	All places
Kingler	Fishing with a super rod	23	25%	All places
Seadra	Fishing with a super rod	23	25%	All places
Goldeen	Fishing with a good rod	10	50%	All places
Seaking	Fishing with a super rod	23	25%	All places
Magikarp	Fishing with an old rod	5	100%	All places
Ditto	Walking in tall grass or a cave	53	1%	All places

Yellow: 12 species
Species	Method	Levels	Chance	Game page
Sandslash	Walking in tall grass or a cave	52	10%	All places
Golbat	Walking in tall grass or a cave	50 to 55	40%	All places
Gloom	Walking in tall grass or a cave	55	10%	All places
Parasect	Walking in tall grass or a cave	54	5%	All places
Venomoth	Walking in tall grass or a cave	54	5%	All places
Poliwag	Fishing with a good rod	10	50%	All places
Weepinbell	Walking in tall grass or a cave	55	10%	All places
Graveler	Walking in tall grass or a cave	45	15%	All places
Goldeen	Fishing with a good rod	10	50%	All places
Goldeen	Fishing with a super rod	25	40%	All places
Seaking	Fishing with a super rod	35 to 55	60%	All places
Magikarp	Fishing with an old rod	5	100%	All places
Ditto	Walking in tall grass or a cave	55 to 60	5%	All places

FireRed: 17 species
Species	Method	Levels	Chance	Game page
Golbat	Walking in tall grass or a cave	46 to 55	14%	All places
Parasect	Walking in tall grass or a cave	49 to 58	25%	All places
Psyduck	Fishing with a super rod	15 to 35	5%	All places
Psyduck	Surfing	30 to 50	65%	All places
Golduck	Surfing	40 to 55	35%	All places
Primeape	Walking in tall grass or a cave	52 to 61	11%	All places
Poliwag	Fishing with a good rod	5 to 15	60%	All places
Poliwag	Fishing with a super rod	15 to 25	40%	All places
Poliwhirl	Fishing with a super rod	20 to 30	40%	All places
Machoke	Walking in tall grass or a cave	46	10%	All places
Geodude	Smashing rocks	30 to 50	65%	All places
Graveler	Smashing rocks	40 to 55	35%	All places
Magneton	Walking in tall grass or a cave	49	20%	All places
Electrode	Walking in tall grass or a cave	58	5%	All places
Goldeen	Fishing with a good rod	5 to 15	20%	All places
Magikarp	Fishing with a good rod	5 to 15	20%	All places
Magikarp	Fishing with an old rod	5	100%	All places
Gyarados	Fishing with a super rod	15 to 25	15%	All places
Ditto	Walking in tall grass or a cave	52 to 61	11%	All places
Wobbuffet	Walking in tall grass or a cave	55	4%	All places

LeafGreen: 17 species
Species	Method	Levels	Chance	Game page
Golbat	Walking in tall grass or a cave	46 to 55	14%	All places
Parasect	Walking in tall grass or a cave	49 to 58	25%	All places
Primeape	Walking in tall grass or a cave	52 to 61	11%	All places
Poliwag	Fishing with a good rod	5 to 15	60%	All places
Poliwag	Fishing with a super rod	15 to 25	40%	All places
Poliwhirl	Fishing with a super rod	20 to 30	40%	All places
Machoke	Walking in tall grass or a cave	46	10%	All places
Geodude	Smashing rocks	30 to 50	65%	All places
Graveler	Smashing rocks	40 to 55	35%	All places
Slowpoke	Fishing with a super rod	15 to 35	5%	All places
Slowpoke	Surfing	30 to 50	65%	All places
Slowbro	Surfing	40 to 55	35%	All places
Magneton	Walking in tall grass or a cave	49	20%	All places
Electrode	Walking in tall grass or a cave	58	5%	All places
Goldeen	Fishing with a good rod	5 to 15	20%	All places
Magikarp	Fishing with a good rod	5 to 15	20%	All places
Magikarp	Fishing with an old rod	5	100%	All places
Gyarados	Fishing with a super rod	15 to 25	15%	All places
Ditto	Walking in tall grass or a cave	52 to 61	11%	All places
Wobbuffet	Walking in tall grass or a cave	55	4%	All places

HeartGold and SoulSilver: 21 species
Species	Method	Levels	Chance	Game page
Golbat	Walking in tall grass or a cave	38 to 39	up to 40%	All places
Parasect	Walking in tall grass or a cave	38	up to 20%	All places
Psyduck	Surfing	35 to 40	90%	All places
Golduck	Surfing	40	10%	All places
Primeape	Walking in tall grass or a cave	38 to 39	up to 10%	All places
Poliwag	Fishing with a good rod	20	up to 45%	All places
Poliwag	Fishing with a super rod	40	up to 40%	All places
Poliwhirl	Fishing with a super rod	40	up to 30%	All places
Machoke	Walking in tall grass or a cave	39 to 40	up to 20%	All places
Geodude	Smashing rocks	22 to 24	90%	All places
Graveler	Smashing rocks	26 to 30	10%	All places
Magneton	Walking in tall grass or a cave	39 to 40	up to 10%	All places
Electrode	Walking in tall grass or a cave	40	5%	All places
Goldeen	Fishing with a good rod	20	up to 30%	All places
Magikarp	Fishing with a good rod	20	15%	All places
Magikarp	Fishing with an old rod	10	100%	All places
Gyarados	Fishing with a super rod	40	30%	All places
Ditto	Walking in tall grass or a cave	39 to 40	up to 10%	All places
Wobbuffet	Walking in tall grass or a cave	37	5%	All places
Makuhita	Walking in tall grass or a cave	39 to 40	20%	All places
Absol	Walking in tall grass or a cave	38	20%	All places
Chingling	Walking in tall grass or a cave	39 to 40	20%	All places
Bronzor	Walking in tall grass or a cave	38	20%	All places

Let's Go, Pikachu and Eevee: 15 species
Species	Method	Levels	Chance	Game page
Zubat	Walking in the overworld	51 to 56	100%	All places
Golbat	Walking in the overworld	51 to 56	100%	All places
Psyduck	Walking in the overworld	51 to 56	100%	All places
Golduck	Walking in the overworld	51 to 56	100%	All places
Poliwag	Surfing in the overworld	51 to 56	100%	All places
Poliwhirl	Surfing in the overworld	51 to 56	100%	All places
Poliwrath	Surfing in the overworld	51 to 56	100%	All places
Geodude	Walking in the overworld	51 to 56	100%	All places
Graveler	Walking in the overworld	51 to 56	100%	All places
Lickitung	Walking in the overworld	51 to 56	100%	All places
Rhyhorn	Walking in the overworld	51 to 56	100%	All places
Rhydon	Walking in the overworld	51 to 56	100%	All places
Magikarp	Surfing in the overworld	51 to 56	100%	All places
Ditto	Walking in the overworld	51 to 56	100%	All places
Snorlax	Rare spawn in grass with lure or catch combo	51 to 56	100%	All places

Area 2 of 3

Cerulean Cave (2F): 34 species across 11 versions

Red and Green (Japan): 9 species, all by walking in tall grass or a cave
Species	Levels	Chance	Game page
Wigglytuff	54	5%	All places
Venomoth	51	20%	All places
Kadabra	51	15%	All places
Dodrio	51	20%	All places
Electrode	52	10%	All places
Marowak	52	10%	All places
Rhydon	52	10%	All places
Chansey	56	5%	All places
Ditto	55 to 60	5%	All places

Red and Blue: 9 species, all by walking in tall grass or a cave
Species	Levels	Chance	Game page
Wigglytuff	54	5%	All places
Venomoth	51	20%	All places
Kadabra	51	15%	All places
Dodrio	51	20%	All places
Electrode	52	10%	All places
Marowak	52	10%	All places
Rhydon	52	10%	All places
Chansey	56	5%	All places
Ditto	55 to 60	5%	All places

Yellow: 8 species, all by walking in tall grass or a cave
Species	Levels	Chance	Game page
Sandslash	56	10%	All places
Golbat	52 to 57	40%	All places
Gloom	58	5%	All places
Weepinbell	58	5%	All places
Graveler	50	15%	All places
Rhyhorn	50	10%	All places
Rhydon	58 to 60	5%	All places
Ditto	60	10%	All places

FireRed and LeafGreen: 10 species
Species	Method	Levels	Chance	Game page
Golbat	Walking in tall grass or a cave	49 to 58	25%	All places
Parasect	Walking in tall grass or a cave	52 to 61	14%	All places
Kadabra	Walking in tall grass or a cave	55 to 64	11%	All places
Machoke	Walking in tall grass or a cave	49	20%	All places
Geodude	Smashing rocks	35 to 55	65%	All places
Graveler	Smashing rocks	45 to 60	35%	All places
Magneton	Walking in tall grass or a cave	52	10%	All places
Electrode	Walking in tall grass or a cave	61	4%	All places
Ditto	Walking in tall grass or a cave	55 to 64	11%	All places
Wobbuffet	Walking in tall grass or a cave	58	5%	All places

HeartGold and SoulSilver: 19 species
Species	Method	Levels	Chance	Game page
Golbat	Walking in tall grass or a cave	41 to 42	up to 10%	All places
Parasect	Walking in tall grass or a cave	40	20%	All places
Psyduck	Surfing	35 to 40	90%	All places
Golduck	Surfing	40	10%	All places
Poliwag	Fishing with a good rod	20	up to 45%	All places
Poliwag	Fishing with a super rod	40	up to 40%	All places
Poliwhirl	Fishing with a super rod	40	up to 30%	All places
Kadabra	Walking in tall grass or a cave	42	20%	All places
Machoke	Walking in tall grass or a cave	39 to 42	up to 10%	All places
Magneton	Walking in tall grass or a cave	41	10%	All places
Electrode	Walking in tall grass or a cave	41	5%	All places
Goldeen	Fishing with a good rod	20	up to 30%	All places
Magikarp	Fishing with a good rod	20	15%	All places
Magikarp	Fishing with an old rod	10	100%	All places
Gyarados	Fishing with a super rod	40	30%	All places
Ditto	Walking in tall grass or a cave	42	10%	All places
Wobbuffet	Walking in tall grass or a cave	42	5%	All places
Makuhita	Walking in tall grass or a cave	41 to 42	20%	All places
Absol	Walking in tall grass or a cave	39 to 41	20%	All places
Chingling	Walking in tall grass or a cave	41 to 42	20%	All places
Bronzor	Walking in tall grass or a cave	39 to 41	20%	All places

Let's Go, Pikachu and Eevee: 10 species
Species	Method	Levels	Chance	Game page
Zubat	Walking in the overworld	51 to 56	100%	All places
Golbat	Walking in the overworld	51 to 56	100%	All places
Geodude	Walking in the overworld	51 to 56	100%	All places
Graveler	Walking in the overworld	51 to 56	100%	All places
Lickitung	Walking in the overworld	51 to 56	100%	All places
Rhyhorn	Walking in the overworld	51 to 56	100%	All places
Rhydon	Walking in the overworld	51 to 56	100%	All places
Chansey	Walking in the overworld	51 to 56	100%	All places
Ditto	Walking in the overworld	51 to 56	100%	All places
Snorlax	Rare spawn in grass with lure or catch combo	51 to 56	100%	All places

Area 3 of 3

Cerulean Cave (B1F): 38 species across 11 versions

Red and Green (Japan): 16 species
Species	Method	Levels	Chance	Game page
Arbok	Walking in tall grass or a cave	57	5%	All places
Raichu	Walking in tall grass or a cave	64	10%	All places
Parasect	Walking in tall grass or a cave	64	10%	All places
Poliwag	Fishing with a good rod	10	50%	All places
Slowbro	Fishing with a super rod	23	25%	All places
Kingler	Fishing with a super rod	23	25%	All places
Electrode	Walking in tall grass or a cave	55	15%	All places
Marowak	Walking in tall grass or a cave	55	20%	All places
Rhydon	Walking in tall grass or a cave	55	20%	All places
Chansey	Walking in tall grass or a cave	64	10%	All places
Seadra	Fishing with a super rod	23	25%	All places
Goldeen	Fishing with a good rod	10	50%	All places
Seaking	Fishing with a super rod	23	25%	All places
Magikarp	Fishing with an old rod	5	100%	All places
Ditto	Walking in tall grass or a cave	63 to 67	10%	All places
Mewtwo	Static encounter	70	100%	All places

Red and Blue: 16 species
Species	Method	Levels	Chance	Game page
Arbok	Walking in tall grass or a cave	57	5%	All places
Raichu	Walking in tall grass or a cave	64	10%	All places
Parasect	Walking in tall grass or a cave	64	10%	All places
Poliwag	Fishing with a good rod	10	50%	All places
Slowbro	Fishing with a super rod	23	25%	All places
Kingler	Fishing with a super rod	23	25%	All places
Electrode	Walking in tall grass or a cave	55	15%	All places
Marowak	Walking in tall grass or a cave	55	20%	All places
Rhydon	Walking in tall grass or a cave	55	20%	All places
Chansey	Walking in tall grass or a cave	64	10%	All places
Seadra	Fishing with a super rod	23	25%	All places
Goldeen	Fishing with a good rod	10	50%	All places
Seaking	Fishing with a super rod	23	25%	All places
Magikarp	Fishing with an old rod	5	100%	All places
Ditto	Walking in tall grass or a cave	63 to 67	10%	All places
Mewtwo	Static encounter	70	100%	All places

Yellow: 12 species
Species	Method	Levels	Chance	Game page
Golbat	Walking in tall grass or a cave	54 to 59	40%	All places
Poliwag	Fishing with a good rod	10	50%	All places
Graveler	Walking in tall grass or a cave	55	15%	All places
Lickitung	Walking in tall grass or a cave	50 to 55	5%	All places
Rhyhorn	Walking in tall grass or a cave	52	10%	All places
Rhydon	Walking in tall grass or a cave	62	10%	All places
Chansey	Walking in tall grass or a cave	56	5%	All places
Goldeen	Fishing with a good rod	10	50%	All places
Goldeen	Fishing with a super rod	30	40%	All places
Seaking	Fishing with a super rod	40 to 60	60%	All places
Magikarp	Fishing with an old rod	5	100%	All places
Ditto	Walking in tall grass or a cave	60 to 65	15%	All places
Mewtwo	Static encounter	70	100%	All places

FireRed: 18 species
Species	Method	Levels	Chance	Game page
Golbat	Walking in tall grass or a cave	52 to 61	11%	All places
Parasect	Walking in tall grass or a cave	55 to 64	14%	All places
Psyduck	Fishing with a super rod	15 to 25	4%	All places
Psyduck	Surfing	40 to 60	65%	All places
Golduck	Surfing	50 to 65	35%	All places
Poliwag	Fishing with a good rod	5 to 15	60%	All places
Poliwag	Fishing with a super rod	15 to 25	40%	All places
Poliwhirl	Fishing with a super rod	20 to 30	40%	All places
Kadabra	Walking in tall grass or a cave	58 to 67	25%	All places
Machoke	Walking in tall grass or a cave	52	10%	All places
Geodude	Smashing rocks	40 to 60	65%	All places
Graveler	Smashing rocks	50 to 65	35%	All places
Magneton	Walking in tall grass or a cave	55	10%	All places
Electrode	Walking in tall grass or a cave	64	4%	All places
Goldeen	Fishing with a good rod	5 to 15	20%	All places
Magikarp	Fishing with a good rod	5 to 15	20%	All places
Magikarp	Fishing with an old rod	5	100%	All places
Gyarados	Fishing with a super rod	15 to 35	16%	All places
Ditto	Walking in tall grass or a cave	58 to 67	25%	All places
Mewtwo	Static encounter	70	100%	All places
Wobbuffet	Walking in tall grass or a cave	61	1%	All places

LeafGreen: 18 species
Species	Method	Levels	Chance	Game page
Golbat	Walking in tall grass or a cave	52 to 61	11%	All places
Parasect	Walking in tall grass or a cave	55 to 64	14%	All places
Poliwag	Fishing with a good rod	5 to 15	60%	All places
Poliwag	Fishing with a super rod	15 to 25	40%	All places
Poliwhirl	Fishing with a super rod	20 to 30	40%	All places
Kadabra	Walking in tall grass or a cave	58 to 67	25%	All places
Machoke	Walking in tall grass or a cave	52	10%	All places
Geodude	Smashing rocks	40 to 60	65%	All places
Graveler	Smashing rocks	50 to 65	35%	All places
Slowpoke	Fishing with a super rod	15 to 25	4%	All places
Slowpoke	Surfing	40 to 60	65%	All places
Slowbro	Surfing	50 to 65	35%	All places
Magneton	Walking in tall grass or a cave	55	10%	All places
Electrode	Walking in tall grass or a cave	64	4%	All places
Goldeen	Fishing with a good rod	5 to 15	20%	All places
Magikarp	Fishing with a good rod	5 to 15	20%	All places
Magikarp	Fishing with an old rod	5	100%	All places
Gyarados	Fishing with a super rod	15 to 35	16%	All places
Ditto	Walking in tall grass or a cave	58 to 67	25%	All places
Mewtwo	Static encounter	70	100%	All places
Wobbuffet	Walking in tall grass or a cave	61	1%	All places

HeartGold and SoulSilver: 22 species
Species	Method	Levels	Chance	Game page
Golbat	Walking in tall grass or a cave	47	10%	All places
Parasect	Walking in tall grass or a cave	45 to 47	25%	All places
Psyduck	Surfing	35 to 40	90%	All places
Golduck	Surfing	40	10%	All places
Poliwag	Fishing with a good rod	20	up to 45%	All places
Poliwag	Fishing with a super rod	40	up to 40%	All places
Poliwhirl	Fishing with a super rod	40	up to 30%	All places
Kadabra	Walking in tall grass or a cave	46	20%	All places
Machoke	Walking in tall grass or a cave	45	10%	All places
Geodude	Smashing rocks	22 to 24	90%	All places
Graveler	Smashing rocks	26 to 30	10%	All places
Magneton	Walking in tall grass or a cave	45 to 47	up to 10%	All places
Electrode	Walking in tall grass or a cave	46	5%	All places
Goldeen	Fishing with a good rod	20	up to 30%	All places
Magikarp	Fishing with a good rod	20	15%	All places
Magikarp	Fishing with an old rod	10	100%	All places
Gyarados	Fishing with a super rod	40	30%	All places
Ditto	Walking in tall grass or a cave	45	10%	All places
Mewtwo	Static encounter	70	100%	All places
Wobbuffet	Walking in tall grass or a cave	49	5%	All places
Makuhita	Walking in tall grass or a cave	45	20%	All places
Absol	Walking in tall grass or a cave	45 to 47	20%	All places
Chingling	Walking in tall grass or a cave	45	20%	All places
Bronzor	Walking in tall grass or a cave	45 to 47	20%	All places

Let's Go, Pikachu and Eevee: 16 species
Species	Method	Levels	Chance	Game page
Zubat	Walking in the overworld	51 to 56	100%	All places
Golbat	Walking in the overworld	51 to 56	100%	All places
Psyduck	Walking in the overworld	51 to 56	100%	All places
Golduck	Walking in the overworld	51 to 56	100%	All places
Poliwag	Surfing in the overworld	51 to 56	100%	All places
Poliwhirl	Surfing in the overworld	51 to 56	100%	All places
Poliwrath	Surfing in the overworld	51 to 56	100%	All places
Geodude	Walking in the overworld	51 to 56	100%	All places
Graveler	Walking in the overworld	51 to 56	100%	All places
Lickitung	Walking in the overworld	51 to 56	100%	All places
Rhyhorn	Walking in the overworld	51 to 56	100%	All places
Rhydon	Walking in the overworld	51 to 56	100%	All places
Magikarp	Surfing in the overworld	51 to 56	100%	All places
Ditto	Walking in the overworld	51 to 56	100%	All places
Snorlax	Rare spawn in grass with lure or catch combo	51 to 56	100%	All places
Mewtwo	Static encounter	70	100%	All places