Kanto Route 20

Route 20 (Japanese: ２０番水道 Water Route 20), known as Sea Route 20 in Generation I, is a water route located in southern Kanto. It connects Route 19 in the east to Cinnabar Island in the west. The Seafoam Islands are located on this route.

Kanto Route 20 ２０番水道 Sea Route 20

Map description A popular path with swimmers. The Seafoam Islands are also here.HGSS An ocean route separated down the middle by the Seafoam Islands.PE

Required for navigation Cut SurfRBYGSCFRLGHGSS Strength Flash Defog Whirlpool Rock Smash Waterfall Dive Rock Climb Bicycle Mach Bike Acro Bike Go-Goggles None

Connecting locations ← Cinnabar Island Route 20 Route 19 →

Location Location of Route 20 in Kanto.

Other generation maps Gen I Gen II Gen III

Pokémon world routes ← Route 19       Route 21 →

Route description

Route 20 stretches from east to west with Seafoam Islands in the middle. From east to west, water stretches the entire length of the route, while a labyrinth of rocks around Seafoam split the route in half, followed by a small rest platform just west of the Seafoam Islands (though this has become a single, large island in Generation IV), before finally reaching Cinnabar Island.

Normally, the only way to cross them is by travelling through the underground caves on the islands. The northern cave can be accessed from the east and the southern cave can be accessed from the west. From the southern entrance to the caves (guarded by a Trainer in Generations III, IV, and VII), Route 20 curves west, passing south of the northern cave through a narrow channel before expanding to the full width of the route. This rest area is occupied by a Trainer in Generation I, III, IV, and VII.

Depending on the generation, the layout of Route 20 between this point and Cinnabar varies.

Differences among generations

Route 20 in Pokémon HeartGold and SoulSilver

Generation I

In the first appearance of this route, the rock boundaries follow a strict path. Rocks blocking the way, forcing people to travel through the Seafoam Islands. There are two signposts numbering the islands, one outside each cave. There is also a wooden pier-like island in the west section, which acts as a rest station. From the rest station, there are three more Trainers, two of which are located very close to each other, before arriving at Cinnabar. There are also two more Trainers along Route 20, one near the western shore of the Seafoam Islands and another just south of the Seafoam entrance on Route 20 in the water.

Generation II

The length of Route 20 was shortened by nearly 30% in the second generation, which resulted in the number of Trainers being cut to three. The rocks around Seafoam that prohibited direct access between the eastern and western halves of the route were removed. The western island doesn't have an entrance, and the cave of the east one is now Blaine's gym. There is just one signpost outside the cave, indicating the Gym and the Gym Leader.

The only item of interest between the rest station and Cinnabar Island is a lone Trainer southwest of the platform.

Generation III

In this generation, Route 20 features four rest islands in total, with two of those isles housing trainers. The rock formations are not straight, making the route seem more natural. The Seafoam Islands are remodeled and made bigger. The characteristics of the Seafoam Islands are essentially that of Generation I. The west island is now a tiny sandbar, and three other sandbars are added near the original.

Generation IV

In this generation, the route is very similar to its appearance in Generation III. The route is the same in length as Generations I and III.

Unlike Generation II, the natural rocky barrier that forces the player to travel through the islands' caves returns. Several rocks are now also present in the middle of the route. The Cinnabar Gym is still in the east cave as it was in Generation II, but now one signpost indicates the landmark's name, and the other has the Gym information.

The only other noticeable change is that the four tiny rest islands from Generation III in the west are now merged into one large sandbar in the southwest section. This large strip of land hosts some Trainers on it. At the Seafoam entrance, three Swimmers and a Picnicker now occupy it.

Generations VII

In this generation, Route 20 features four rest islands in total as it did in Generation III, but now it has three trainers on these islands. From the rest station isle present westward in all generations, the route passes north of a small island occupied by a Trainer, with Trainers directly to the north and west of it, before heading south of the largest rest island on the route, north of another small island with a Trainer and north of another Trainer before coming to Cinnabar.

Items

Item		Location	Games
	Revive	On a lone rock near the southwest corner of the eastern half of the route (requires Sea Skim) (hidden) (daily)	P  E
	Heart Scale	Next to the southern Seafoam Islands entrance	P  E
	Revive ×2	On a lone rock in the northeast corner of the western half of the route (requires Sea Skim) (hidden) (daily) On a lone rock on the western half of the route, west of Swimmer Dean (requires Sea Skim) (hidden) (daily)	P  E
	Ultra Ball ×3	On the island where Bird Keeper Roger stands	P  E
	Max Repel	On the large unoccupied island near Cinnabar Island	P  E
	Stardust	On the island nearest Cinnabar Island, where Ace Trainer Marty stands (hidden) (daily)	P  E
	Stardust	On the large unoccupied island near Cinnabar Island (hidden recurring item; group B)	FR  LG
	Stardust	On the northeast corner of the long, narrow sandbar on Cinnabar's side (hidden)	HG  SS
	DeepSeaTooth	To the right of the entrance to Blaine's Gym (hidden)	HG  SS
	DeepSeaScale	North of Seafoam Islands, near Swimmer Luis (hidden)	HG  SS

Pokémon

Generation I

In Pokémon Red and Blue, due to a programming oversight, the encounters on the tiles on the east coasts of Cinnabar Island and Seafoam Islands contain Pokémon found in tall grass from the previously visited area with tall grass present. This results in the Fight Safari Zone Pokémon trick and the old man glitch in those games.

Pokémon	Games						Location	Levels	Rate
Surfing
Tentacool	R		B		Y		Surfing	5, 10, 15, 20, 30, 35, 40	100%
Fishing
Magikarp	R		B		Y		Fishing Old Rod	5	100%
Poliwag	R		B		Y		Fishing Good Rod	10	50%
Goldeen	R		B		Y		Fishing Good Rod	10	50%
Tentacool	R		B		Y		Fishing Super Rod	20	40%
Tentacruel	R		B		Y		Fishing Super Rod	20, 40	40%
Shellder	R		B		Y		Fishing Super Rod	15	25%
Horsea	R		B		Y		Fishing Super Rod	15	25%
Goldeen	R		B		Y		Fishing Super Rod	15	25%
Staryu	R		B		Y		Fishing Super Rod	15	25%
Staryu	R		B		Y		Fishing Super Rod	30	20%
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Generation II

Pokémon	Games						Location	Levels	Rate
Surfing
Tentacool	G		S		C		Surfing	30-39	90%
Tentacruel	G		S		C		Surfing	35-39	10%
Fishing
Tentacool	G		S		C		Fishing Old Rod	10	15%
Magikarp	G		S		C		Fishing Old Rod	10	85%
Tentacool	G		S		C		Fishing Good Rod	20	35%
Shellder	G		S		C		Fishing Good Rod	20	10%
Magikarp	G		S		C		Fishing Good Rod	20	35%
Chinchou	G		S		C		Fishing Good Rod	20	20%
Tentacruel	G		S		C		Fishing Super Rod	40	20%
Shellder	G		S		C		Fishing Super Rod	40	30%
Chinchou	G		S		C		Fishing Super Rod	40	40%
Lanturn	G		S		C		Fishing Super Rod	40	10%
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Generation III

Pokémon	Games						Location	Levels	Rate
Surfing
Tentacool	FR			LG			Surfing	5-40	100%
Fishing
Magikarp	FR			LG			Fishing Old Rod	5	100%
Krabby	FR			LG			Fishing Good Rod	5-15	20%
Krabby	FR			LG			Fishing Good Rod	5-15	60%
Horsea	FR			LG			Fishing Good Rod	5-15	60%
Horsea	FR			LG			Fishing Good Rod	5-15	20%
Magikarp	FR			LG			Fishing Good Rod	5-15	20%
Psyduck	FR			LG			Fishing Super Rod	25-35	1%
Slowpoke	FR			LG			Fishing Super Rod	25-35	1%
Krabby	FR			LG			Fishing Super Rod	15-25	80%
Kingler	FR			LG			Fishing Super Rod	25-35	4%
Horsea	FR			LG			Fishing Super Rod	15-25	80%
Seadra	FR			LG			Fishing Super Rod	25-35	4%
Gyarados	FR			LG			Fishing Super Rod	15-25	15%
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Generation IV

Pokémon	Games						Location	Levels	Rate
Surfing
Tentacool	HG			SS			Surfing	30-35	90%
Tentacruel	HG			SS			Surfing	35	10%
Fishing
Tentacool	HG			SS			Fishing Old Rod	10	15%
Magikarp	HG			SS			Fishing Old Rod	10	85%
Tentacool	HG			SS			Fishing Good Rod	20	30%
Shellder	HG			SS			Fishing Good Rod	20	10%
Magikarp	HG			SS			Fishing Good Rod	20	40%
Chinchou	HG			SS			Fishing Good Rod	20	20%
Tentacruel	HG			SS			Fishing Super Rod	40	20%
Shellder	HG			SS			Fishing Super Rod	40	30%
Chinchou	HG			SS			Fishing Super Rod	40	40%
Lanturn	HG			SS			Fishing Super Rod	40	10%
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Generation VII

Pokémon	Games						Location	Levels	Rate
Sea Skim
Tentacool	P			E			Sea Skim	37-42	45%
Tentacruel	P			E			Sea Skim	37-42	5%
Magikarp	P			E			Sea Skim	37-42	45%
Gyarados	P			E			Sea Skim	37-42	5%
Rare Spawns
Lapras	P			E			Sea Skim	37-42	-
While riding a Flying Pokémon
Pidgey	P			E			Midair	3-56	60%
Pidgeotto	P			E			Midair	3-56	35%
Pidgeot	P			E			Midair	3-56	5%
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.

Trainers

Generation I

The following Trainers are listed from east to west.

Trainer	Pokémon
East of the islands
Swimmer Reward: $155	Shellder Lv.31 No item
	Cloyster Lv.31 No item
Swimmer Reward: $140	Horsea Lv.28 No item
	Horsea Lv.28 No item
	Seadra Lv.28 No item
	Horsea Lv.28 No item
Beauty Reward: $2100	Seadra Lv.30 No item
	Horsea Lv.30 No item
	Seadra Lv.30 No item
Beauty Reward: $2450	Seaking Lv.35 No item
West of the islands
Jr. Trainer♀ Reward: $600	Tentacool Lv.30 No item
	Horsea Lv.30 No item
	Seel Lv.30 No item
Swimmer Reward: $175	Staryu Lv.35 No item
Bird Keeper Reward: $750	Fearow Lv.30 No item
	Fearow Lv.30 No item
	Pidgeotto Lv.30 No item
Beauty Reward: $2100	Shellder Lv.30 No item
	Shellder Lv.30 No item
	Cloyster Lv.30 No item
Jr. Trainer♀ Reward: $620	Goldeen Lv.31 No item
	Seaking Lv.31 No item
Beauty Reward: $2170	Poliwag Lv.31 No item
	Seaking Lv.31 No item

Generation II

The following Trainers are listed from west to east.

Trainer	Pokémon
Swimmer♂ Cameron カツヤ Katsuya Reward: $272	Marill♂ Lv.34 No item
Swimmer♀ Lori ケイ Kay Reward: $640	Starmie Lv.32 No item
	Starmie Lv.32 No item
Swimmer♀ Nicole クニミ Kunimi Reward: $640	Marill♀ Lv.29 No item
	Marill♀ Lv.29 No item
	Lapras♀ Lv.32 No item
Trainers with a telephone symbol by their names will give their Pokégear number to the player, and may call or be called for a rematch with higher-level Pokémon.

Generation III

The following Trainers are listed from east to west.

Trainer	Pokémon
East of the islands
Swimmer♂ Barry ガクジ Gakuji Reward: $124	Shellder♂ Lv.31 No item
	Cloyster♂ Lv.31 No item
Swimmer♂ Darrin テルユキ Teruyuki Reward: $112	Horsea♂ Lv.28 No item
	Horsea♂ Lv.28 No item
	Horsea♂ Lv.28 No item
	Seadra♂ Lv.28 No item
Swimmer♀ Shirley アサミ Asami Reward: $120	Seadra♀ Lv.30 No item
	Horsea♀ Lv.30 No item
	Seadra♀ Lv.30 No item
Swimmer♀ Tiffany ハルコ Haruko Reward: $140	Seaking♀ Lv.35 No item
West of the islands
Picnicker Irene ミズキ Mizuki Reward: $600	Tentacool♀ Lv.30 No item
	Horsea♀ Lv.30 No item
	Seel♀ Lv.30 No item
Bird Keeper Roger トモヒコ Tomohiko Reward: $720	Fearow♂ Lv.30 No item
	Fearow♂ Lv.30 No item
	Pidgeotto♂ Lv.30 No item
Swimmer♀ Nora リリカ Ririka Reward: $120	Shellder♀ Lv.30 No item
	Shellder♀ Lv.30 No item
	Cloyster♀ Lv.30 No item
Swimmer♂ Dean レツジ Retsuji Reward: $140	Staryu Lv.35 No item
Picnicker Missy クミコ Kumiko Reward: $620	Goldeen♀ Lv.31 No item
	Seaking♀ Lv.31 No item
Swimmer♀ Melissa メグミ Megumi Reward: $124	Poliwag♀ Lv.31 No item
	Seaking♀ Lv.31 No item
Rematch
Swimmer♂ Darrin テルユキ Teruyuki Reward: $208 After delivering the Sapphire to Celio	Seadra♂ Lv.52 No item
	Seadra♂ Lv.52 No item
	Seadra♂ Lv.52 No item
	Seadra♂ Lv.52 No item
Picnicker Missy クミコ Kumiko Reward: $700 After becoming Champion	Seaking♀ Lv.49 No item
	Seaking♀ Lv.49 No item
Picnicker Missy クミコ Kumiko Reward: $1080 After delivering the Sapphire to Celio and defeating the previous team	Seaking♀ Lv.54 No item
	Seaking♀ Lv.54 No item
Swimmer♀ Melissa メグミ Megumi Reward: $196 After becoming Champion	Poliwhirl♀ Lv.49 No item
	Seaking♀ Lv.49 No item
Trainers with a Vs. Seeker by their names, when alerted for a rematch using the item, may use higher-level Pokémon.

Generation IV

The following Trainers are listed from west to east.

Trainer	Pokémon
West of the islands
Swimmer Frankie カツヤ Katsuya Reward: $704	Azumarill♂ Lv.44 No item
Bird Keeper Bert マスミツ Masumitsu Reward: $1376	Wingull♂ Lv.46 No item
	Fearow♂ Lv.43 No item
Swimmer Mina チグミ Chigumi Reward: $656	Luvdisc♀ Lv.38 No item
	Luvdisc♀ Lv.39 No item
	Luvdisc♀ Lv.41 No item
Picnicker Cheyenne アサミ Asami Reward: $720	Shinx♀ Lv.45 No item
Bird Keeper Ernie ヤジロウ Yajirō Reward: $1536	Starly♂ Lv.48 No item
Swimmer Leona リオナ Leona Reward: $704	Bidoof♀ Lv.44 No item
Picnicker Adrian ナナカ Nanaka Reward: $720	Shroomish♀ Lv.45 No item
East of the islands
Swimmer Luis トシミツ Toshimitsu Reward: $672	Seadra♂ Lv.46 No item
	Quagsire♂ Lv.42 No item
Camper Pedro シンヤ Shin'ya Reward: $720	Linoone♂ Lv.45 Sitrus Berry
Swimmer Elmo シブキ Shibuki Reward: $672	Poliwhirl♂ Lv.46 No item
	Tentacruel♂ Lv.42 No item
Swimmer Lori ケイ Kay Reward: $672	Starmie Lv.42 No item
	Starmie Lv.42 No item
	Starmie Lv.42 No item
Swimmer Nicole クニミ Kunimi Reward: $672	Marill♀ Lv.39 No item
	Marill♀ Lv.39 No item
	Lapras♀ Lv.42 No item
Trainers with a telephone symbol by their names will give their Pokégear number to the player, and may call or be called for a rematch with higher-level Pokémon.

Generation VII

The following Trainers are listed from east to west.

Trainer	Pokémon
East of the islands
Swimmer Douglas タツオ Tatsuo Reward: $820 3 Poké Balls	Gyarados♂ Lv.42 No item
Swimmer Darrin テルユキ Teruyuki Reward: $880 3 Poké Balls	Golduck♂ Lv.44 No item
	Gyarados♂ Lv.44 No item
Beauty Shirley アサミ Asami Reward: $820 3 Poké Balls	Wartortle♀ Lv.41 No item
	Starmie Lv.41 No item
West of the islands
Picnicker Irene ミズキ Mizuki Reward: $860 2 Great Balls	Marowak♀ Lv.43 No item
	Gloom♀ Lv.43 No item
	Wigglytuff♀ Lv.43 No item
Beauty Hansol ナツミ Natsumi Reward: $860 3 Poké Balls	Slowbro♂ Lv.43 No item
Bird Keeper Roger トモヒコ Tomohiko Reward: $2,700 3 Poké Balls	Fearow♂ Lv.45 No item
	Dodrio♂ Lv.45 No item
	Pidgeot♀ Lv.45 No item
Swimmer Dean レツジ Retsuji Reward: $880 3 Poké Balls	Starmie Lv.44 No item
	Tentacruel♀ Lv.44 No item
	Kingler♂ Lv.44 No item
Picnicker Missy クミコ Kumiko Reward: $820 2 Great Balls	Jolteon♀ Lv.41 No item
Beauty Nora リリカ Ririka Reward: $820 3 Poké Balls	Cloyster♂ Lv.41 No item
Beauty Melissa メグミ Megumi Reward: $860 3 Poké Balls	Seaking♂ Lv.43 No item
	Jynx♀ Lv.43 No item
Ace Trainer Marty ショウ Shō Reward: $4,600 5 Ultra Balls	Golem♂ Lv.45 No item
	Pinsir♂ Lv.46 No item

Post-game

Trainer	Pokémon
East of the islands
Master Trainer Beauty Tessa ハルナ Haruna	Blastoise♀ Lv.80 Fake Out Rock Slide Dark Pulse Substitute
Master Trainer Scientist Francis トクマ Tokuma	Tentacool♂ Lv.75 Barrier Headbutt Hydro Pump -
West of the islands
Master Trainer Beauty Rose ミレイ Mirei	Cloyster♂ Lv.75 Barrier Toxic Protect Rest
Master Trainer Beauty Prita ミナミ Minami	Wartortle♀ Lv.75 Headbutt Rock Slide Skull Bash -
Master Trainer Scientist Melvin フミヒト Fumihito	Tentacruel♂ Lv.80 Wrap Screech Barrier Headbutt

In the manga

Route 20 in Pokémon Adventures

Pokémon Adventures

Red, Green & Blue arc

Route 20 made a brief appearance in the beginning of Holy Moltres, where Red was seen arriving at Cinnabar Island on his Gyarados after having visited the Seafoam Islands.

Related articles

• Seafoam Islands

Kanto
Settlements Pallet Town • Viridian City • Pewter City • Cerulean City • Vermilion City • Lavender Town Celadon City • Saffron City • Fuchsia City • Cinnabar Island • Indigo Plateau Routes 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 • 26 • 27 • 28 Landmarks Professor Oak's Laboratory • Viridian Forest • Diglett's Cave • Pewter Museum of Science • Mt. Moon (Square) • Cerulean Cave Underground Path (Kanto Routes 5–6) • Underground Path (Kanto Routes 7–8) • S.S. Anne • S.S. Aqua • Sea Cottage • Rock Tunnel Power Plant • Cycling Road/Pokémon Road • Team Rocket Hideout • Silph Co. • Magnet Train • Pokémon Tower • Safari Zone/Pal Park GO Park • Seafoam Islands • Pokémon Mansion • Cinnabar Lab • Pokémon League Reception Gate • Victory Road • Tohjo Falls Access to Sevii Islands • Johto

This article is part of Project Routes, a Bulbapedia project that aims to write comprehensive articles on every route in the Pokémon world.