Seafoam Islands and finding out its tricky push puzzle solutions, as well as your reward of Articuno, are your next objectives, following on from Route 20 east in your quest through Pokémon Let's Go's main story.

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: how to get through Seafoam Islands

The Seafoam Islands cave is probably the most complex dungeon you'll have enountered so far in Pokémon Let's Go, and in fact it's one of the most complex in the game in general - but don't let that put you off! There are some wonderful Pokémon to catch here, as well as the legendary Articuno that we explain how to reach in the section down below.

pokemon_lets_go_seafoam_islands_1

In this first section we'll give you a quick cheat sheet for the fastest route through the dungeon and out the other side. In the sections below, we'll map out the cave's various levels one by one, including where each and every ladder goes, and walk you through them from start to finish, as well as, of course, noting all the available items, Pokémon, and trainers you can find along the way.

A couple notes as you head inside: There's a woman on the left of the entrance to Seafoam Islands who'll heal your Pokémon for free, which is nice! You might want to pack some Repels to clear all the wild Pokémon that get in the way.

pokemon_lets_go_seafoam_islands_2

Note that the below is the fastest route, but you'll miss several items along the way, as well as the entirety of B4F, meaning you'll also miss out on Articuno! Head to the bottom section on this page (there are shortcuts in the contents above) to see how to catch Articuno and clear B4F along the way.

Push puzzle solutions and the fastest way through Seafoam Islands

  1. Enter 1F and push the first stone, found to the right, down the nearby hole.
  2. Drop down the hole you pushed it into, down next to it onto B1F, and push it into the next hole nearby there.
  3. Drop into that hole too, taking you down to B2F, and push it into the nearby hole once more. Don't drop in after it this time.
  4. Instead, once you've pushed it down the hole, go left over to the ladder we've marked as B2F-A, which takes you up to B1F again.
  5. From B1F, take the nearby ladder, marked B1F-A, up to 1F entrance level again.
  6. Back on the entrance, go over to the top-right hand side now and push the boulder there down the nearby hole. Go down the ladder 1F-B after it, to B1F.
  7. There on B1F, push the dropped stone down the nearby hole. Drop in after it, to B2F
  8. Push it down the nearby hole on B2F, and follow it again down to B3F - you'll land in the water.
  9. If you've done this correctly, there'll be two boulders in the water just above you - the two you've been pushing down the holes from the entrance level 1F. This stops the fast-flowing water that would normally whisk you away, allowing you to surf normally.
  10. Surf to the right and go back onto land, and take the bottom-right corner ladder, B3F-D up to B2F.
  11. Take the nearby ladder there, B2F-D, up again, to B1F.
  12. Take the nearby ladder there, B1F-G, up one last time to top level 1F.
  13. There, you'll be in the bottom right corner of 1F, and just downwards in the lower wall is the exit!

Back to top and contents.

Seafoam Islands Entrance: 1F ladders, Pokémon, items and trainers

The entrance level, which we'll call 1F, is one of five in Seafoam Islands, gradually descending to the lowest level, B4F. It also has another man who'll give you more Poké Balls up ramp and on the right, which is worth bearing in mind.

Remember your goal is to push the movable stones into the nearby holes in order to progress throughout the dungeon. The first one on the entrance level is simple. The second, over on the right, requires you to push it downwards first before then pushing it across and back upwards into the hole.

1F Entrance ladders

ImageLadder LabelUp or DownLocationDestination
pokemon_lets_go_seafoam_islands_ladder_1fa
1F-A Down Upper left, by Coach Trainer, up the ramp from the Route 20 east entrance B1F-A
pokemon_lets_go_seafoam_islands_ladder_1fb
1F-B Down Top right ladder downwards B1F-B
pokemon_lets_go_seafoam_islands_ladder_1fc
1F-C Down Bottom right walled off area, by the Route 20 west exit! B1F-D

Available Pokémon

PokémonNotes
Zubat Cave
Golbat Cave
Jinx Cave
Seel Cave
Dewgong Cave
Slowpoke Cave
Slowbro Cave
Squirtle Catch Combo

Available Items

ItemLocation
Ice Heal Straight ahead on a ledge
5x Rare Candies Coach Trainer Yas
Heart Scale Hidden, in pointy rock in bottom right of entrance area
Escape Rope Up ramp and on the right

Trainers and Battles

Trainer NamePokémonLevel
Coach Trainer Yas Jolteon
Flareon
Vaporeon
46
47
46

Back to top and contents.

Seafoam Islands Basement 1: B1F ladders, Pokémon, items and trainers

The Pokémon here are the same as 1F, and there are no trainers, but there are plenty of items to gather still.

B1F Basement 1 Ladders

ImageLadder LabelUp or DownLocationDestination
pokemon_lets_go_seafoam_islands_ladder_b1fa
B1F-A Up Top left ladder upwards 1F-A
pokemon_lets_go_seafoam_islands_ladder_b1fb
B1F-B Up Top right walled-off area. 1F-B
pokemon_lets_go_seafoam_islands_ladder_b1fc
B1F-C Down Very top left ladder downwards B2F-A
pokemon_lets_go_seafoam_islands_ladder_b1fd
B1F-D Down Bottom right walled off area B2F-B
pokemon_lets_go_seafoam_islands_ladder_b1fe
B1F-E Down Central large platform B2F-D
pokemon_lets_go_seafoam_islands_ladder_b1ff
B1F-F Down Walled-off lower central-right area, only accessible via B2F B2F-F
pokemon_lets_go_seafoam_islands_ladder_b1fg
B1F-G Up Bottom right corner, only accessible via exit or B2F. 1F-C

Available Pokémon

PokémonNotes
Zubat Cave
Golbat Cave
Jinx Cave
Seel Cave
Dewgong Cave
Slowpoke Cave
Slowbro Cave
Squirtle Catch Combo

Available Items

ItemLocation
Max Potion Enter B1F from the first ladder on Entrance level, and it's around the back of the platform you come down to
Super Repel As you work your way over to the right from the left hand ladder
Max Revive Hidden, in the rock in the bottom right of the area with the pushable stone and hole
5x Great Balls Area by the ladder that takes you down on the right.

Back to top and contents.

Seafoam Islands Basement 2: B2F ladders, Pokémon, items and trainers

Again, the Pokémon remain the same here on B2F and again there are no trainers, but more items to collect as you pass through.

B2F Basement 2 Ladders

ImageLadder LabelUp or DownLocationDestination
pokemon_lets_go_seafoam_islands_ladder_b2fa
B2F-A Up Top-left walled-off area with push stone and hole. B1F-C
pokemon_lets_go_seafoam_islands_ladder_b2fb
B2F-B Up Bottom right square platform area. B1F-D
pokemon_lets_go_seafoam_islands_ladder_b2fc
B2F-C Down Bottom right square platformed area B3F-D
pokemon_lets_go_seafoam_islands_ladder_b2fd
B2F-D Up Central ladder on main platform B1F-E
pokemon_lets_go_seafoam_islands_ladder_b2fe
B2F-E Down Bottom left of main area B3F-C
pokemon_lets_go_seafoam_islands_ladder_b2ff
B2F-F Up Bottom right of main area B1F-F
pokemon_lets_go_seafoam_islands_ladder_b2fg
B2F-G Down Top right, raised platform in walled-off area, only accessible from B3F. B3F-B

Available Pokémon

PokémonNotes
Zubat Cave
Golbat Cave
Jinx Cave
Seel Cave
Dewgong Cave
Slowpoke Cave
Slowbro Cave
Squirtle Catch Combo

Available Items

ItemLocation
Heart Scale Hidden in the cluser of rocks to the left of the left-side ladder down from B1F
Super Lure Area in the bottom right, only accessed from below.

Back to top and contents.

Seafoam Islands Basement 3: B3F ladders, Pokémon, items and trainers

Once again B3F has no trainers, but with the addition of some surfable water it introduces some more Pokémon at least, as well as more items.

B3F Basement 3 Ladders

ImageLadder LabelUp or DownLocationDestination
pokemon_lets_go_seafoam_islands_ladder_b3fa
B3F-A Down Upper left in a little lower square, left of the river B4F
pokemon_lets_go_seafoam_islands_ladder_b3fb
B3F-B Up Top right, small rectangular platform only accessible from B4F B2F-G
pokemon_lets_go_seafoam_islands_ladder_b3fc
B3F-C Up Bottom left above push puzzle B2F-E
pokemon_lets_go_seafoam_islands_ladder_b3fd
B3F-D Up Bottom right corner on right of the river B2F-C
pokemon_lets_go_seafoam_islands_ladder_b3fe
B3F-E Down Top right, small rectangular platform only accessible from B4F B4F-A

Available Pokémon

PokémonNotes
Zubat Cave
Golbat Cave
Jinx Cave
Seel Cave
Dewgong Cave
Slowpoke Cave
Slowbro Cave
Squirtle Catch Combo
Tentacool Surfing on water
Tentacruel Surfing on water
Magikarp Surfing on water
Shellder Surfing on water
Cloyster Surfing on water - Rare

Available Items

ItemLocation
TM55 Ice Beam Down the ladder from B2F, it's on the lower level just in front of you
Super Repel Small area on the far right between two ladders, as you head up from the far right of B4F
3x Ultra Balls On the right of the river, after you stop the flow by dropping the stones down.
Ice Stone Small platform with two ladders in the very bottom right corner, only accessed from below.
Hyper Potion On the left side of the flowing river, accessible after you've dropped both stones down to block the flow of water
Super Lure On the left side of the flowing river, accessible after you've dropped both stones down to block the flow of water
X Speed On the left side of the flowing river, accessible after you've dropped both stones down to block the flow of water

Back to top and contents.

Seafoam Islands Basement 4: B 4F ladders, Pokémon, items and trainers

The lowest level, B4F, has no trainers and the same wild Pokémon as B3F, but with the added inclusion of some good items and, of course, the Legendary Articuno!

B4F Basement 4 Ladders

ImageLadder LabelUp or DownLocationDestination
pokemon_lets_go_seafoam_islands_ladder_b4fa
B4F-AUpTop right, just above the pool you get sent to by the moving river.B3FE
pokemon_lets_go_seafoam_islands_ladder_b4fb
B4F-BUpCentral, near ramp down to the waterB3FA

Available Pokémon

PokémonNotes
ZubatCave
GolbatCave
JinxCave
SeelCave
DewgongCave
SlowpokeCave
SlowbroCave
SquirtleCatch Combo
TentacoolSurfing on water
TentacruelSurfing on water
MagikarpSurfing on water
ShellderSurfing on water
CloysterSurfing on water - Rare
ArticunoInteract and defeat in battle.

Available Items

ItemLocation
Big PearlOn land on the left, after being swept downstream to the room with the pool of water
Pretty WingHidden on the right, opposite the Big Pearl in the area with the pool of water
Big PearlDown a ramp near one of the ladders back up to B3F
Big PearlOn the left of the island at the top back of the area.

Trainers and Battles

Trainer NamePokémonLevel
Wild ArticunoArticuno50

Back to top and contents.


For all our Let's Go helpers in once place, head to our main Pokémon Let's Go walkthrough and guide hub which includes guides to tricky areas like the postgame Cerulean Cave, and the Elite Four, plus tough dungeons like Silph Co., Seafoam Islands and Victory Road. Otherwise, we detail a 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. Likewise, we go over how connect Pokémon Go to Let's Go on Nintendo Switch and transfer Pokémon, Catching, catch combos, and how to catch Pokémon explained , and finally give you a quick rundown of our selected Pokémon Let's Go tips and tricks to get you off to a great start, too.


Pokémon Let's Go Seafoam Islands - how to get Articuno

Articuno resides on Seafoam Islands' lowest level, B4F. This level is entirely optional - as you'll have seen in our walkthrough of the fastest way to the exit, you can skip it entirely on your way through from Route 20 east to Route 20 west and beyond.

Thankfully, it's not too much more work to get to Articuno. You just have to solve one more push puzzle, on B3F, to push a couple more boulders down to the lowest level and stop another fast-moving current. Do that, and you can surf up to Articuno on the top-left corner of B4F to catch it.

pokemon_lets_go_articuno_3

How to get Articuno - push puzzle solution

  1. Complete all of the steps listed at the top of the page, but this time when you get to B3F having pushed both boulders into the water from the top floor, don't go right to the ladder upwards which takes you to the exit.
  2. Instead, when you drop into the now-still river, surf left, to the other part of B3F.
  3. From there, go to the bottom-left area where you'll see several more stones in another more complex push puzzle. There are 4 stones to push and two holes, with two stones next to each other on the top right of the little area. Here's the solution:
    1. First, go to the far left and push the far left stone into the hole next to it.
    2. Then, come back over to the right, and push the middle stone - the single one - a few places to the left, to get it out of the way.
    3. Then push the top right stone - the right-side one of the two next to each other - all the way up to the wall above it.
    4. Then, walk up and behind the left of those two stones, and push it down two places. You can then get to the right of it, in order to push it left until it's above the right-hand hole.
    5. The second hole, on the left, is simple - just push the stone to the left of it into the hole.
    6. You can now get above it, having cleared the other stones out of the way, and push it down into that hole.
  4. With that second stone pushed down the holes, drop in after it, to go down into the water on 4F, that has now stopped flowing, letting you surf upwards!
  5. Surf upwards to the top left corner where you'll find an island, with an item on it and more importantly, Articuno!
pokemon_lets_go_articuno_1
pokemon_lets_go_articuno_2

Once you reach Articuno, things will work in the same way as they did with Snorlax - so save first, while you have a chance, just in case. Interact with it when you're ready and expect a fairly tricky battle - it's level 50 and can be lightning-quick after it uses Agility a couple of times - and then once it's knocked out, you go to the catch phase like ususal.

To exit from there, surf back to dry land and take the first ladder you come across, which we labelled B4F-B in the table above. This'll take you back to B3F, where you can head to the river again, surf over to the right hand side, and take that bottom right ladder up (through several more ladders) to the bottom right of the cave and the exit.

Congratulations - that's a tricky dungeon to complete! Continue on to Route 20 west and onwards beyond that for the next steps in your quest, or 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

Guides Writer

Chris Tapsell is Eurogamer's Guides 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.

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