Route 20 east and Route 20 west are two parts of the water-based route that follows on from the bottom of Route 19 in your quest through Pokémon Let's Go's main story, and are split either side of Seafoam Islands.

Below, we'll cover any and all of the obtainable Pokémon, item locations, trainers and their squads that you might encounter in the area, as well as walking you through any key steps of the story along the way.

We've also opted to break out walkthrough pages down into sections, referring to each of your visits to a given location, seeing as you often backtrack or revisit various places in your quest to become Champion! Where applicable, we'll split our page into one section for each visit, and of course if there are any, clearly mark any spoilers, too!

For more like this, be it specific systems explainers or walkthrough pages on more locations, head back to our main Pokémon Let's Go walkthrough and guide hub.

On this page:

Pokémon Let's Go: Route 20 east - available Pokémon, items and trainers

Route 20 east is more of the same after Route 19 really, only with the addition of one more wild Pokémon to be caught. Surf westwards until you come up on dry land at Seafoam Islands, which is a big dungeon you'll need to clear before progressing on to Route 20 west, that we cover below!

Note that some exterior parts of the Seafoam Islands count as Route 20, like this spot by Picknicker Irene!

Available Pokémon

TentacoolSurfing on water
TentacruelSurfing on water
MagikarpSurfing on water
GyaradosSurfing on water
LaprasCatch Combo

Available Items

3x Poké BallsSwimmer Darrin
ReviveHidden, in large single rock along bottom of route
3x Poké BallsBeauty Shirley
2x Great BallsPicnicker Irene
Heart ScaleTo the right of Picnicker Irene

Trainers and Battles

Trainer NamePokémonLevel
Swimmer DarrinGolduck
Beauty ShirleyWartotle
Picnicker IreneMarowak

That's it for Route 20 east - your next stop is Seafoam Islands!

Head back to our main Pokémon Let's Go walkthrough and guide hub for all our pages in one place, including detailed, step-by-step help for tough spots like Cerulean Cave, and the Elite Four, plus tough dungeons like Silph Co., Seafoam Islands and Victory Road. Otherwise, take a peek(achu) at our Pokémon Let's Go TM list and all TM locations, Let's Go's starter locations and how to get Bulbasaur, Charmander and Squirtle, along with how to get Mew in Let's Go, and how to get Meltan in Let's Go and Go too. Beyond that we also explain how connect Pokémon Go to Let's Go on Nintendo Switch and transfer Pokémon, Catching, catch combos, and how to catch Pokémon, a quick collection of our best Pokémon Let's Go tips and tricks to get you off to a great start, and finally what we know about the Pokémon Pass app distribution event too.

Pokémon Let's Go: Route 20 west - available Pokémon, items and trainers

Route 20 west carries on after Seafoam Islands in much the same way as Route 20 east, with the same Pokémon to catch, too. There are plenty of items and trainers though!


Available Pokémon

Tentacool Surfing on water
Tentacruel Surfing on water
Magikarp Surfing on water
Gyarados Surfing on water
Lapras Catch Combo

Available Items

3x Poké Balls Beauty Hansol
Revive Hidden, in large single rock to the top right of the small patch of land with Bird Keeper Roger
3x Poké Balls Swimmer Dean
Revive Hidden in large single rock to the left of Swimmer Dean
3x Poké Balls Bird Keeper Roger
3x Ultra Balls On small patch of land with Bird Keeper Roger
2x Great Balls Picnicker Missy
Max Repel Small patch of land just above Beauty Nora
3x Poké Balls Beauty Nora
5x Ultra Balls Ace Trainer Marty
3x Poké Balls Beauty Melissa

Trainers and Battles

Trainer NamePokémonLevel
Beauty Hansol Slowbro 43
Swimmer Dean Starmie
Bird Keeper Roger Fearow
Picnicker Missy Jolteon 41
Beauty Nora Cloyster 41
Ace Trainer Marty Golem
Beauty Melissa Seaking

That's everything here for now, so continue on to Seafom Islands for the next steps in your quest if you're on Route 20 east, or if you've come out the other side and now finished up Route 20 west, your next stop is Cinnabar Island!

Otherwise, cycle back to our main Pokémon Let's Go walkthrough and guide hub for all the other pages we have like this.

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About the author

Chris Tapsell

Chris Tapsell

Staff Writer

Chris Tapsell is Eurogamer's Staff Writer, its newest Chris, and a keen explorer of the dark arts of gaming, from League of Legends to the murky world of competitive Pokémon.