Route 20

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RGBY (Japanese) RBY (Western) GSC

Route 20

Access to:
West: Cinnabar Island
East: Route 19
Accessible on the route: Seafoam Islands

Utility:
Surf is required to traverse the route from either direction. Wild Pokémon can also be encountered here with Surf.

Pokémon

Surfing

Red (Full)
Pokémon		Level	Rate
	Tentacool	5	20%
	Tentacool	10	20%
	Tentacool	15	15%
	Tentacool	5	10%
	Tentacool	10	10%
	Tentacool	15	10%
	Tentacool	20	5%
	Tentacool	30	5%
	Tentacool	35	4%
	Tentacool	40	1%

Green (Full)
Pokémon		Level	Rate
	Tentacool	5	20%
	Tentacool	10	20%
	Tentacool	15	15%
	Tentacool	5	10%
	Tentacool	10	10%
	Tentacool	15	10%
	Tentacool	20	5%
	Tentacool	30	5%
	Tentacool	35	4%
	Tentacool	40	1%

Blue (Full)
Pokémon		Level	Rate
	Tentacool	5	20%
	Tentacool	10	20%
	Tentacool	15	15%
	Tentacool	5	10%
	Tentacool	10	10%
	Tentacool	15	10%
	Tentacool	20	5%
	Tentacool	30	5%
	Tentacool	35	4%
	Tentacool	40	1%

Yellow (Full)
Pokémon		Level	Rate
	Tentacool	5	20%
	Tentacool	10	20%
	Tentacool	15	15%
	Tentacool	5	10%
	Tentacool	10	10%
	Tentacool	15	10%
	Tentacool	20	5%
	Tentacool	30	5%
	Tentacool	35	4%
	Tentacool	40	1%

Combined (Full)
Rate	Red			Green			Blue			Yellow
20%		Tentacool	5		Tentacool	5		Tentacool	5		Tentacool	5
20%		Tentacool	10		Tentacool	10		Tentacool	10		Tentacool	10
15%		Tentacool	15		Tentacool	15		Tentacool	15		Tentacool	15
10%		Tentacool	5		Tentacool	5		Tentacool	5		Tentacool	5
10%		Tentacool	10		Tentacool	10		Tentacool	10		Tentacool	10
10%		Tentacool	15		Tentacool	15		Tentacool	15		Tentacool	15
5%		Tentacool	20		Tentacool	20		Tentacool	20		Tentacool	20
5%		Tentacool	30		Tentacool	30		Tentacool	30		Tentacool	30
4%		Tentacool	35		Tentacool	35		Tentacool	35		Tentacool	35
1%		Tentacool	40		Tentacool	40		Tentacool	40		Tentacool	40

Combined (Compressed)
Pokémon		Red	Green	Blue	Yellow
	Tentacool	100% 5, 10, 15, 20, 30, 35, 40	100% 5, 10, 15, 20, 30, 35, 40	100% 5, 10, 15, 20, 30, 35, 40	100% 5, 10, 15, 20, 30, 35, 40

Fishing

Red (Full)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Staryu	Super	15	25%
	Horsea	Super	15	25%
	Shellder	Super	15	25%
	Goldeen	Super	15	25%

Green (Full)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Staryu	Super	15	25%
	Horsea	Super	15	25%
	Shellder	Super	15	25%
	Goldeen	Super	15	25%

Blue (Full)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Staryu	Super	15	25%
	Horsea	Super	15	25%
	Shellder	Super	15	25%
	Goldeen	Super	15	25%

Yellow (Full)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Tentacool	Super	20	40%
	Tentacruel	Super	20	30%
	Staryu	Super	30	20%
	Tentacruel	Super	40	10%

Combined (Full)
Rate	Rod	Red			Green			Blue			Yellow
100%	Old		Magikarp	5		Magikarp	5		Magikarp	5		Magikarp	5
50%	Good		Goldeen	10		Goldeen	10		Goldeen	10		Goldeen	10
50%	Good		Poliwag	10		Poliwag	10		Poliwag	10		Poliwag	10
25%	Super		Staryu	15		Staryu	15		Staryu	15	N/A
25%	Super		Horsea	15		Horsea	15		Horsea	15	N/A
25%	Super		Shellder	15		Shellder	15		Shellder	15	N/A
25%	Super		Goldeen	15		Goldeen	15		Goldeen	15	N/A
40%	Super	N/A			N/A			N/A				Tentacool	20
30%	Super	N/A			N/A			N/A				Tentacruel	20
20%	Super	N/A			N/A			N/A				Staryu	30
10%	Super	N/A			N/A			N/A				Tentacruel	40

Red (Compressed)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Staryu	Super	15	25%
	Horsea	Super	15	25%
	Shellder	Super	15	25%
	Goldeen	Super	15	25%

Green (Compressed)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Staryu	Super	15	25%
	Horsea	Super	15	25%
	Shellder	Super	15	25%
	Goldeen	Super	15	25%

Blue (Compressed)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Staryu	Super	15	25%
	Horsea	Super	15	25%
	Shellder	Super	15	25%
	Goldeen	Super	15	25%

Yellow (Compressed)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Tentacool	Super	20	40%
	Tentacruel	Super	20, 40	40%
	Staryu	Super	30	20%

Combined (Compressed)
Pokémon		Rod	Red	Green	Blue	Yellow
	Magikarp	Old	100% 5	100% 5	100% 5	100% 5
	Goldeen	Good	50% 10	50% 10	50% 10	50% 10
	Poliwag	Good	50% 10	50% 10	50% 10	50% 10
	Staryu	Super	25% 15	25% 15	25% 15	20% 30
	Horsea	Super	25% 15	25% 15	25% 15	N/A
	Shellder	Super	25% 15	25% 15	25% 15	N/A
	Goldeen	Super	25% 15	25% 15	25% 15	N/A
	Tentacool	Super	N/A	N/A	N/A	40% 20
	Tentacruel	Super	N/A	N/A	N/A	40% 20, 40

Pokémon

Surfing

Red (Full)
Pokémon		Level	Rate
	Tentacool	5	20%
	Tentacool	10	20%
	Tentacool	15	15%
	Tentacool	5	10%
	Tentacool	10	10%
	Tentacool	15	10%
	Tentacool	20	5%
	Tentacool	30	5%
	Tentacool	35	4%
	Tentacool	40	1%

Blue (Full)
Pokémon		Level	Rate
	Tentacool	5	20%
	Tentacool	10	20%
	Tentacool	15	15%
	Tentacool	5	10%
	Tentacool	10	10%
	Tentacool	15	10%
	Tentacool	20	5%
	Tentacool	30	5%
	Tentacool	35	4%
	Tentacool	40	1%

Yellow (Full)
Pokémon		Level	Rate
	Tentacool	5	20%
	Tentacool	10	20%
	Tentacool	15	15%
	Tentacool	5	10%
	Tentacool	10	10%
	Tentacool	15	10%
	Tentacool	20	5%
	Tentacool	30	5%
	Tentacool	35	4%
	Tentacool	40	1%

Combined (Full)
Rate	Red			Blue			Yellow
20%		Tentacool	5		Tentacool	5		Tentacool	5
20%		Tentacool	10		Tentacool	10		Tentacool	10
15%		Tentacool	15		Tentacool	15		Tentacool	15
10%		Tentacool	5		Tentacool	5		Tentacool	5
10%		Tentacool	10		Tentacool	10		Tentacool	10
10%		Tentacool	15		Tentacool	15		Tentacool	15
5%		Tentacool	20		Tentacool	20		Tentacool	20
5%		Tentacool	30		Tentacool	30		Tentacool	30
4%		Tentacool	35		Tentacool	35		Tentacool	35
1%		Tentacool	40		Tentacool	40		Tentacool	40

Combined (Compressed)
Pokémon		Red	Blue	Yellow
	Tentacool	100% 5, 10, 15, 20, 30, 35, 40	100% 5, 10, 15, 20, 30, 35, 40	100% 5, 10, 15, 20, 30, 35, 40

Fishing

Red (Full)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Staryu	Super	15	25%
	Horsea	Super	15	25%
	Shellder	Super	15	25%
	Goldeen	Super	15	25%

Blue (Full)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Staryu	Super	15	25%
	Horsea	Super	15	25%
	Shellder	Super	15	25%
	Goldeen	Super	15	25%

Yellow (Full)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Tentacool	Super	20	40%
	Tentacruel	Super	20	30%
	Staryu	Super	30	20%
	Tentacruel	Super	40	10%

Combined (Full)
Rate	Rod	Red			Blue			Yellow
100%	Old		Magikarp	5		Magikarp	5		Magikarp	5
50%	Good		Goldeen	10		Goldeen	10		Goldeen	10
50%	Good		Poliwag	10		Poliwag	10		Poliwag	10
25%	Super		Staryu	15		Staryu	15	N/A
25%	Super		Horsea	15		Horsea	15	N/A
25%	Super		Shellder	15		Shellder	15	N/A
25%	Super		Goldeen	15		Goldeen	15	N/A
40%	Super	N/A			N/A				Tentacool	20
30%	Super	N/A			N/A				Tentacruel	20
20%	Super	N/A			N/A				Staryu	30
10%	Super	N/A			N/A				Tentacruel	40

Red (Compressed)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Staryu	Super	15	25%
	Horsea	Super	15	25%
	Shellder	Super	15	25%
	Goldeen	Super	15	25%

Blue (Compressed)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Staryu	Super	15	25%
	Horsea	Super	15	25%
	Shellder	Super	15	25%
	Goldeen	Super	15	25%

Yellow (Compressed)
Pokémon		Rod	Level	Rate
	Magikarp	Old	5	100%
	Goldeen	Good	10	50%
	Poliwag	Good	10	50%
	Tentacool	Super	20	40%
	Tentacruel	Super	20, 40	40%
	Staryu	Super	30	20%

Combined (Compressed)
Pokémon		Rod	Red	Blue	Yellow
	Magikarp	Old	100% 5	100% 5	100% 5
	Goldeen	Good	50% 10	50% 10	50% 10
	Poliwag	Good	50% 10	50% 10	50% 10
	Staryu	Super	25% 15	25% 15	20% 30
	Horsea	Super	25% 15	25% 15	N/A
	Shellder	Super	25% 15	25% 15	N/A
	Goldeen	Super	25% 15	25% 15	N/A
	Tentacool	Super	N/A	N/A	40% 20
	Tentacruel	Super	N/A	N/A	40% 20, 40

Pokémon

Wild Shellder have a 23% chance of holding a Pearl and a 2% chance of holding a Big Pearl.

Surfing

Combined (Full)
Rate	Gold			Silver			Crystal
60% (Anytime)		Tentacool	35		Tentacool	35		Tentacool	35
30% (Anytime)		Tentacool	30		Tentacool	30		Tentacool	30
10% (Anytime)		Tentacruel	35		Tentacruel	35		Tentacruel	35

Combined (Compressed)
Pokémon		Gold	Silver	Crystal
	Tentacool	90% (Anytime) lv. 30, 35 (Anytime)	90% (Anytime) lv. 30, 35 (Anytime)	90% (Anytime) lv. 30, 35 (Anytime)
	Tentacruel	10% (Anytime) lv. 35 (Anytime)	10% (Anytime) lv. 35 (Anytime)	10% (Anytime) lv. 35 (Anytime)

Fishing

Gold (Full)
Pokémon		Rod	Level	Rate	Time
	Magikarp	Old	10	70%	Anytime
	Magikarp	Old	10	15%	Anytime
	Tentacool	Old	10	15%	Anytime
	Magikarp	Good	20	35%	Anytime
	Tentacool	Good	20	35%	Anytime
	Chinchou	Good	20	20%	Anytime
	Shellder	Good	20	10%	Anytime
	Chinchou	Super	40	40%	Anytime
	Shellder	Super	40	30%	Anytime
	Tentacruel	Super	40	20%	Anytime
	Lanturn	Super	40	10%	Anytime

Silver (Full)
Pokémon		Rod	Level	Rate	Time
	Magikarp	Old	10	70%	Anytime
	Magikarp	Old	10	15%	Anytime
	Tentacool	Old	10	15%	Anytime
	Magikarp	Good	20	35%	Anytime
	Tentacool	Good	20	35%	Anytime
	Chinchou	Good	20	20%	Anytime
	Shellder	Good	20	10%	Anytime
	Chinchou	Super	40	40%	Anytime
	Shellder	Super	40	30%	Anytime
	Tentacruel	Super	40	20%	Anytime
	Lanturn	Super	40	10%	Anytime

Crystal (Full)
Pokémon		Rod	Level	Rate	Time
	Magikarp	Old	10	70%	Anytime
	Magikarp	Old	10	15%	Anytime
	Tentacool	Old	10	15%	Anytime
	Magikarp	Good	20	35%	Anytime
	Tentacool	Good	20	35%	Anytime
	Chinchou	Good	20	20%	Anytime
	Shellder	Good	20	10%	Anytime
	Chinchou	Super	40	40%	Anytime
	Shellder	Super	40	30%	Anytime
	Tentacruel	Super	40	20%	Anytime
	Lanturn	Super	40	10%	Anytime

Combined (Full)
Rate	Rod	Gold			Silver			Crystal
70% (Anytime)	Old		Magikarp	10		Magikarp	10		Magikarp	10
15% (Anytime)	Old		Magikarp	10		Magikarp	10		Magikarp	10
15% (Anytime)	Old		Tentacool	10		Tentacool	10		Tentacool	10
35% (Anytime)	Good		Magikarp	20		Magikarp	20		Magikarp	20
35% (Anytime)	Good		Tentacool	20		Tentacool	20		Tentacool	20
20% (Anytime)	Good		Chinchou	20		Chinchou	20		Chinchou	20
10% (Anytime)	Good		Shellder	20		Shellder	20		Shellder	20
40% (Anytime)	Super		Chinchou	40		Chinchou	40		Chinchou	40
30% (Anytime)	Super		Shellder	40		Shellder	40		Shellder	40
20% (Anytime)	Super		Tentacruel	40		Tentacruel	40		Tentacruel	40
10% (Anytime)	Super		Lanturn	40		Lanturn	40		Lanturn	40

Gold (Compressed)
Pokémon		Rod	Level	Rate	Time
	Magikarp	Old	10	85%	Anytime
	Tentacool	Old	10	15%	Anytime
	Magikarp	Good	20	35%	Anytime
	Tentacool	Good	20	35%	Anytime
	Chinchou	Good	20	20%	Anytime
	Shellder	Good	20	10%	Anytime
	Chinchou	Super	40	40%	Anytime
	Shellder	Super	40	30%	Anytime
	Tentacruel	Super	40	20%	Anytime
	Lanturn	Super	40	10%	Anytime

Silver (Compressed)
Pokémon		Rod	Level	Rate	Time
	Magikarp	Old	10	85%	Anytime
	Tentacool	Old	10	15%	Anytime
	Magikarp	Good	20	35%	Anytime
	Tentacool	Good	20	35%	Anytime
	Chinchou	Good	20	20%	Anytime
	Shellder	Good	20	10%	Anytime
	Chinchou	Super	40	40%	Anytime
	Shellder	Super	40	30%	Anytime
	Tentacruel	Super	40	20%	Anytime
	Lanturn	Super	40	10%	Anytime

Crystal (Compressed)
Pokémon		Rod	Level	Rate	Time
	Magikarp	Old	10	85%	Anytime
	Tentacool	Old	10	15%	Anytime
	Magikarp	Good	20	35%	Anytime
	Tentacool	Good	20	35%	Anytime
	Chinchou	Good	20	20%	Anytime
	Shellder	Good	20	10%	Anytime
	Chinchou	Super	40	40%	Anytime
	Shellder	Super	40	30%	Anytime
	Tentacruel	Super	40	20%	Anytime
	Lanturn	Super	40	10%	Anytime

Combined (Compressed)
Pokémon		Rod	Gold	Silver	Crystal
	Magikarp	Old	85% (Anytime) lv. 10 (Anytime)	85% (Anytime) lv. 10 (Anytime)	85% (Anytime) lv. 10 (Anytime)
	Tentacool	Old	15% (Anytime) lv. 10 (Anytime)	15% (Anytime) lv. 10 (Anytime)	15% (Anytime) lv. 10 (Anytime)
	Magikarp	Good	35% (Anytime) lv. 20 (Anytime)	35% (Anytime) lv. 20 (Anytime)	35% (Anytime) lv. 20 (Anytime)
	Tentacool	Good	35% (Anytime) lv. 20 (Anytime)	35% (Anytime) lv. 20 (Anytime)	35% (Anytime) lv. 20 (Anytime)
	Chinchou	Good	20% (Anytime) lv. 20 (Anytime)	20% (Anytime) lv. 20 (Anytime)	20% (Anytime) lv. 20 (Anytime)
	Shellder	Good	10% (Anytime) lv. 20 (Anytime)	10% (Anytime) lv. 20 (Anytime)	10% (Anytime) lv. 20 (Anytime)
	Chinchou	Super	40% (Anytime) lv. 40 (Anytime)	40% (Anytime) lv. 40 (Anytime)	40% (Anytime) lv. 40 (Anytime)
	Shellder	Super	30% (Anytime) lv. 40 (Anytime)	30% (Anytime) lv. 40 (Anytime)	30% (Anytime) lv. 40 (Anytime)
	Tentacruel	Super	20% (Anytime) lv. 40 (Anytime)	20% (Anytime) lv. 40 (Anytime)	20% (Anytime) lv. 40 (Anytime)
	Lanturn	Super	10% (Anytime) lv. 40 (Anytime)	10% (Anytime) lv. 40 (Anytime)	10% (Anytime) lv. 40 (Anytime)

Trainers

RGBY Trainers
Trainer	Games				Party	Notes
Swimmer	R	G	B	Y	Shellder lv.31 Cloyster lv.31	East of Seafoam Islands.
Swimmer	R	G	B	Y	Horsea lv.28 Horsea lv.28 Seadra lv.28 Horsea lv.28	East of Seafoam Islands.
Beauty	R	G	B	Y	Seadra lv.30 Horsea lv.30 Seadra lv.30	East of Seafoam Islands.
Beauty	R	G	B	Y	Seaking lv.35	East of Seafoam Islands.
Jr. Trainer	R	G	B	Y	Tentacool lv.30 Horsea lv.30 Seel lv.30	West of Seafoam Islands.
Swimmer	R	G	B	Y	Staryu lv.35	West of Seafoam Islands.
Bird Keeper	R	G	B	Y	Fearow lv.30 Fearow lv.30 Pidgeotto lv.30	West of Seafoam Islands.
Beauty	R	G	B	Y	Shellder lv.30 Shellder lv.30 Cloyster lv.30	West of Seafoam Islands.
Jr. Trainer	R	G	B	Y	Goldeen lv.31 Seaking lv.31	West of Seafoam Islands.
Beauty	R	G	B	Y	Poliwag lv.31 Seaking lv.31	West of Seafoam Islands.

Trainers

RBY Trainers
Trainer	Games			Party	Notes
Swimmer	R	B	Y	Shellder lv.31 Cloyster lv.31	East of Seafoam Islands.
Swimmer	R	B	Y	Horsea lv.28 Horsea lv.28 Seadra lv.28 Horsea lv.28	East of Seafoam Islands.
Beauty	R	B	Y	Seadra lv.30 Horsea lv.30 Seadra lv.30	East of Seafoam Islands.
Beauty	R	B	Y	Seaking lv.35	East of Seafoam Islands.
Jr. Trainer	R	B	Y	Tentacool lv.30 Horsea lv.30 Seel lv.30	West of Seafoam Islands.
Swimmer	R	B	Y	Staryu lv.35	West of Seafoam Islands.
Bird Keeper	R	B	Y	Fearow lv.30 Fearow lv.30 Pidgeotto lv.30	West of Seafoam Islands.
Beauty	R	B	Y	Shellder lv.30 Shellder lv.30 Cloyster lv.30	West of Seafoam Islands.
Jr. Trainer	R	B	Y	Goldeen lv.31 Seaking lv.31	West of Seafoam Islands.
Beauty	R	B	Y	Poliwag lv.31 Seaking lv.31	West of Seafoam Islands.