Route 20

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

Utility:
Surf is required to access and traverse this route. Wild Pokémon can also be encountered here with Surf.

Rare Spawn (Sea Skim, East)
Pokémon	Levels
	Lapras	lv. 37-42

Rare Spawn (Sea Skim, West)
Pokémon	Levels
	Lapras	lv. 39-44

FireRed and LeafGreen Items
Item	Location	Notes
Stardust	Two tiles east and two north of the southwestern corner of the large island on the western half of the route	Hidden. May regenerate after the player takes 1500 steps.

HeartGold and SoulSilver Items
Item	Location	Notes
Stardust	One tile north and one west of the southeasternmost tile on the sandbar north of Bird Keeper Ernie, on the western half of the route	Hidden.
DeepSeaTooth	Seven tiles east of Picnicker Adrian, east of the entrance to the Seafoam Islands, on the western half of the route	Hidden.
DeepSeaScale	Two tiles east and two south of Swimmer♂ Luis, north of the Seafoam Islands, on the eastern half of the route	Hidden.

Let's Go Pikachu and Let's Go Eevee Items
Item	Location	Notes
Revive	On a rock southwest of Swimmer Darrin, on the eastern half of the route	Hidden.
Heart Scale	East of Picnicker Irene, on the western half of the route
Revive	On a lone rock northeast of the island with Bird Keeper Roger, on the western half of the route	Hidden.
Revive	On a rock west of Swimmer Dean, on the western half of the route	Hidden.
Ultra Ball (3x)	On the island with Bird Keeper Roger, on the western half of the route
Max Repel	On the large island on the western half of the route
Stardust	Just west of Ace Trainer Marty on the western half of the route	Hidden.

Trainers

Red, Green, Blue, and Yellow Trainers
Trainer	Party	Notes
かいパンやろう (Swimmer)	Shellder lv.31 Cloyster lv.31	East of the Seafoam Islands.
かいパンやろう (Swimmer)	Horsea lv.28 Horsea lv.28 Seadra lv.28 Horsea lv.28	East of the Seafoam Islands.
おとなのおねえさん (Beauty)	Seadra lv.30 Horsea lv.30 Seadra lv.30	East of the Seafoam Islands.
おとなのおねえさん (Beauty)	Seaking lv.35	East of the Seafoam Islands.
ガールスカウト (Jr. Trainer♀)	Tentacool lv.30 Horsea lv.30 Seel lv.30	West of the Seafoam Islands.
かいパンやろう (Swimmer)	Staryu lv.35	West of the Seafoam Islands.
とりつかい (Bird Keeper)	Fearow lv.30 Fearow lv.30 Pidgeotto lv.30	West of the Seafoam Islands.
おとなのおねえさん (Beauty)	Shellder lv.30 Shellder lv.30 Cloyster lv.30	West of the Seafoam Islands.
ガールスカウト (Jr. Trainer♀)	Goldeen lv.31 Seaking lv.31	West of the Seafoam Islands.
おとなのおねえさん (Beauty)	Poliwag lv.31 Seaking lv.31	West of Seafoam Islands.

Trainers

Red, Blue, and Yellow Trainers
Trainer	Party	Notes
Swimmer	Shellder lv.31 Cloyster lv.31	East of the Seafoam Islands.
Swimmer	Horsea lv.28 Horsea lv.28 Seadra lv.28 Horsea lv.28	East of the Seafoam Islands.
Beauty	Seadra lv.30 Horsea lv.30 Seadra lv.30	East of the Seafoam Islands.
Beauty	Seaking lv.35	East of the Seafoam Islands.
Jr. Trainer♀	Tentacool lv.30 Horsea lv.30 Seel lv.30	West of the Seafoam Islands.
Swimmer	Staryu lv.35	West of the Seafoam Islands.
Bird Keeper	Fearow lv.30 Fearow lv.30 Pidgeotto lv.30	West of the Seafoam Islands.
Beauty	Shellder lv.30 Shellder lv.30 Cloyster lv.30	West of the Seafoam Islands.
Jr. Trainer♀	Goldeen lv.31 Seaking lv.31	West of the Seafoam Islands.
Beauty	Poliwag lv.31 Seaking lv.31	West of the Seafoam Islands.

Gold, Silver, and Crystal Trainers
Trainer	Party
Swimmer♂ Cameron	Marill lv.34
Swimmer♀ Lori	Starmie lv.32 Starmie lv.32
Swimmer♀ Nicole	Marill lv.29 Marill lv.29 Lapras lv.32

Trainers

FireRed and LeafGreen Trainers
Trainer	Party	Notes
Swimmer♂ Barry	Shellder lv.31 Cloyster lv.31	East of the Seafoam Islands.
Swimmer♂ Darrin	Horsea lv.28 Horsea lv.28 Horsea lv.28 Seadra lv.28	East of the Seafoam Islands. He can have a higher-leveled team if rematched with the VS Seeker.
Swimmer♀ Shirley	Seadra lv.30 Horsea lv.30 Seadra lv.30	East of the Seafoam Islands.
Swimmer♀ Tiffany	Seaking lv.35	East of the Seafoam Islands.
Picnicker Irene	Tentacool lv.30 Horsea lv.30 Seel lv.30	West of the Seafoam Islands.
Bird Keeper Roger	Fearow lv.30 Fearow lv.30 Pidgeotto lv.30	West of the Seafoam Islands.
Swimmer♀ Nora	Shellder lv.30 Shellder lv.30 Cloyster lv.30	West of the Seafoam Islands.
Swimmer♂ Dean	Staryu lv.35	West of the Seafoam Islands.
Picnicker Missy	Goldeen lv.31 Seaking lv.31	West of the Seafoam Islands. She can have a higher-leveled team if rematched with the VS Seeker.
Swimmer♀ Melissa	Poliwag lv.31 Seaking lv.31	West of the Seafoam Islands. She can have a higher-leveled team if rematched with the VS Seeker.

Rematches

FireRed and LeafGreen Trainers
Trainer	Party	Notes
Swimmer♂ Darrin	Seadra lv.52 Seadra lv.52 Seadra lv.52 Seadra lv.52	East of the Seafoam Islands. Only after restoring the Network Machine on One Island.
Picnicker Missy	Seaking lv.49 Seaking lv.49	West of the Seafoam Islands. Only after defeating the Elite Four.
Picnicker Missy	Seaking lv.54 Seaking lv.54	West of the Seafoam Islands. Only after restoring the Network Machine on One Island.
Swimmer♀ Melissa	Poliwhirl lv.49 Seaking lv.49	West of the Seafoam Islands. Only after defeating the Elite Four.

Trainers

HeartGold and SoulSilver Trainers
Trainer	Party	Notes
Swimmer♂ Frankie	Azumarill lv.44	West of the Seafoam Islands.
Bird Keeper Bert	Wingull lv.46 Fearow lv.43	West of the Seafoam Islands.
Swimmer♀ Mina	Luvdisc lv.38 Luvdisc lv.39 Luvdisc lv.41	West of the Seafoam Islands.
Picnicker Cheyenne	Shinx lv.45	West of the Seafoam Islands.
Bird Keeper Ernie	Starly lv.48	West of the Seafoam Islands.
Swimmer♀ Leona	Bidoof lv.44	West of the Seafoam Islands.
Picnicker Adrian	Shroomish lv.45	West of the Seafoam Islands.
Swimmer♂ Luis	Seadra lv.46 Quagsire lv.42	East of the Seafoam Islands.
Camper Pedro	Linoone lv.45 @ Sitrus Berry	East of the Seafoam Islands.
Swimmer♂ Elmo	Poliwhirl lv.46 Tentacruel lv.42	East of the Seafoam Islands.
Swimmer♀ Lori	Starmie lv.42 Starmie lv.42 Starmie lv.42	East of the Seafoam Islands.
Swimmer♀ Nicole	Marill lv.39 Marill lv.39 Lapras lv.42	East of the Seafoam Islands.

Trainers

Let's Go Pikachu and Let's Go Eevee Trainers
Trainer	Party	Notes
Swimmer Douglas	Gyarados lv.42	East of the Seafoam Islands. The player will receive 3 Poké Balls after the battle.
Swimmer Darrin	Golduck lv.44 Gyarados lv.44	East of the Seafoam Islands. The player will receive 3 Poké Balls after the battle.
Beauty Shirley	Wartortle lv.41 Starmie lv.41	East of the Seafoam Islands. The player will receive 3 Poké Balls after the battle.
Picnicker Irene	Marowak lv.43 Gloom lv.43 Wigglytuff lv.43	West of the Seafoam Islands. The player will receive 2 Great Balls after the battle.
Beauty Hansol	Slowbro lv.43	West of the Seafoam Islands. The player will receive 3 Poké Balls after the battle.
Bird Keeper Roger	Fearow lv.45 Dodrio lv.45 Pidgeot lv.45	West of the Seafoam Islands. The player will receive 3 Poké Balls after the battle.
Swimmer Dean	Starmie lv.44 Tentacruel lv.44 Kingler lv.44	West of the Seafoam Islands. The player will receive 3 Poké Balls after the battle.
Picnicker Missy	Jolteon lv.41	West of the Seafoam Islands. The player will receive 2 Great Balls after the battle.
Beauty Nora	Cloyster lv.41	West of the Seafoam Islands. The player will receive 3 Poké Balls after the battle.
Beauty Melissa	Seaking lv.43 Jynx lv.43	West of the Seafoam Islands. The player will receive 3 Poké Balls after the battle.
Ace Trainer Marty	Golem lv.45 Pinsir lv.46	West of the Seafoam Islands. The player will receive 5 Ultra Balls after the battle.

Master Trainers

Master Trainers can only be battled after defeating the Elite Four.

Let's Go Pikachu and Let's Go Eevee Master Trainers
Trainer		Level	Nature	Moves				HP	Atk	Def	SpA	SpD	Spe
Beauty Tessa (Eastern half of the route)	Blastoise	80	Careful	Fake Out	Rock Slide	Dark Pulse	Substitute	361	212	339	198	366	254
Beauty Tessa (Eastern half of the route)	Blastoise	80	Careful					361	212	339	198	366	254
Scientist Francis (Eastern half of the route)	Tentacool	75	Careful	Barrier	Headbutt	Hydro Pump	N/A	218	88	180	92	245	133
Scientist Francis (Eastern half of the route)	Tentacool	75	Careful				N/A	218	88	180	92	245	133
Beauty Rose (Western half of the route)	Cloyster	75	Bold	Barrier	Toxic	Protect	Rest	383	132	527	132	72	213
Beauty Rose (Western half of the route)	Cloyster	75	Bold					383	132	527	132	72	213
Beauty Prita (Western half of the route)	Wartortle	75	Careful	Headbutt	Rock Slide	Skull Bash	N/A	284	164	258	155	271	207
Beauty Prita (Western half of the route)	Wartortle	75	Careful				N/A	284	164	258	155	271	207
Scientist Melvin (Western half of the route)	Tentacruel	80	Careful	Wrap	Screech	Barrier	Headbutt	362	291	183	119	393	189
Scientist Melvin (Western half of the route)	Tentacruel	80	Careful					362	291	183	119	393	189