Red & Blue Seafoam Islands

Fast currents and Strength boulder puzzles fill this frozen island cave, with Articuno, the Freeze Pokemon, roosting in its lowest chamber.

Seafoam Islands is in Kanto. In the story you arrive from Route 20 through its entrance and it comes before Cinnabar Island.

SEAFOAM ISLANDS MAP

The currents run too fast to Surf until you weigh them down, so you shove boulders into the water with Strength, then cross the slack channels. The cave keeps dropping floors as you go.

Red & Blue

Seafoam Islands Walkthrough

0 trainers 2 items 17 species

1F

0 TRAINERS · 0 ITEMS · 11 SPECIES
1
In Seafoam Islands, StrengthMoveStrengthNormalClassPhysicalPower80Accuracy100%PP15A powerful physi­ cal attack. sends each boulder pair down through holes, one floor at a time.
  1. The eastern doorway only leads down, so take its ladders to B3F, ride the eastern water into B4F, and climb the western ladders back up.
  2. Push the west boulder north and then west into its hole, and the east boulder north and west into the other.
Blocked pathMovable Boulderx2
HM04 Strength
Rainbow Badge

Requires StrengthMoveStrengthNormalClassPhysicalPower80Accuracy100%PP15A powerful physi­ cal attack. (Rainbow Badge) to move

B1F

0 TRAINERS · 0 ITEMS · 10 SPECIES
2
Drop down the west hole behind the first boulder, then shove it east into the B1F hole next to it.
  1. Drop after it and push it east again on B2F.
  2. Take the ladders back up to 1F and fall through the east hole.
  3. Shove the second boulder east into its hole.
Blocked pathMovable Boulderx2
HM04 Strength
Rainbow Badge

Appears here only after you push it down a hole on 1F; requires StrengthMoveStrengthNormalClassPhysicalPower80Accuracy100%PP15A powerful physi­ cal attack. (Rainbow Badge) to move

B2F

0 TRAINERS · 1 ITEM · 10 SPECIES
3
Follow it to B2F and push it west into the other hole.
  1. With both B2F boulders sunk, the B3F current stops dragging you away.
  2. Collect the hidden NuggetNuggetITEM · VALUABLEB2F, on a rock in the south area of the floor (hidden) on a rock in the south area of B2F, where the south ladder of B1F sets you down.
Blocked pathMovable Boulderx2
HM04 Strength
Rainbow Badge

Appears here only after you push it down a hole on B1F; requires StrengthMoveStrengthNormalClassPhysicalPower80Accuracy100%PP15A powerful physi­ cal attack. (Rainbow Badge) to move

Nugget

B3F

0 TRAINERS · 1 ITEM · 13 SPECIES
4
Drop through a B2F hole, then SurfMoveSurfWaterClassSpecialPower95Accuracy100%PP15A strong water-type attack. and walk west across B3F to the southwest corner boulders.
  1. Shove them until one falls down each hole, which stills the B4F current.
  2. Pick up the hidden Max ElixirMax ElixirITEM · PP RESTOREB3F, on the rock south of the easternmost boulder (hidden) on the rock south of the easternmost boulder.
Blocked pathMovable Boulderx4
HM04 Strength
Rainbow Badge

Requires StrengthMoveStrengthNormalClassPhysicalPower80Accuracy100%PP15A powerful physi­ cal attack. (Rainbow Badge) to move

Max Elixir

B4F

0 TRAINERS · 0 ITEMS · 13 SPECIES
5
Drop through a B3F hole onto the still water of B4F and SurfMoveSurfWaterClassSpecialPower95Accuracy100%PP15A strong water-type attack. north up the western channel to Articuno.
  1. Save first, since knocking it out removes it for good.
  2. Then climb the western ladders and leave west for Route 20.
Legendary encounter
ArticunoLv 50

Pokemon Encounters

Seel and Dewgong make these caves the best spot to add an Ice-type, and the rods split by version, Red's Seadra against Blue's Krabby and Kingler. Articuno itself roosts at the bottom, a level 50 catch worth saving up for.

Method
Floor
Type
✦Special encounters1
#144Articuno
Legendary Lv 50
▾1F13
Walking13
#086Seel
20% - Lv 30
#116Horsea
20% - Lv 28–30
Red
#098Krabby
20% - Lv 28–30
Blue
#054Psyduck
20% - Lv 30
Blue
#079Slowpoke
20% - Lv 30
Red
#090Shellder
19% - Lv 28–30
Red
#120Staryu
19% - Lv 28–30
Blue
#041Zubat
10% - Lv 21
#042Golbat
5% - Lv 29
#054Psyduck
5% - Lv 28
Red
#079Slowpoke
5% - Lv 28
Blue
#055Golduck
1% - Lv 38
Red
#080Slowbro
1% - Lv 38
Blue
▾B1F12
Walking12
#116Horsea
30% - Lv 30–32
Red
#098Krabby
30% - Lv 30–32
Blue
#090Shellder
20% - Lv 30
Blue
#120Staryu
20% - Lv 30
Red
#054Psyduck
15% - Lv 28–30
Blue
#086Seel
15% - Lv 28–30
#090Shellder
15% - Lv 32
Red
#079Slowpoke
15% - Lv 28–30
Red
#120Staryu
15% - Lv 32
Blue
#087Dewgong
4% - Lv 38
#099Kingler
1% - Lv 37
Blue
#117Seadra
1% - Lv 37
Red
▾B2F12
Walking12
#086Seel
35% - Lv 30–32
#054Psyduck
30% - Lv 30–32
Blue
#079Slowpoke
30% - Lv 30–32
Red
#116Horsea
15% - Lv 28–30
Red
#098Krabby
15% - Lv 28–30
Blue
#090Shellder
10% - Lv 30
Blue
#120Staryu
10% - Lv 30
Red
#090Shellder
5% - Lv 28
Red
#120Staryu
5% - Lv 28
Blue
#042Golbat
4% - Lv 30
#055Golduck
1% - Lv 37
Blue
#080Slowbro
1% - Lv 37
Red
▾B3F17
Walking10
#054Psyduck
35% - Lv 31–33
Blue
#079Slowpoke
35% - Lv 31–33
Red
#086Seel
30% - Lv 31–33
#116Horsea
15% - Lv 29–31
Red
#098Krabby
15% - Lv 29–31
Blue
#090Shellder
15% - Lv 29–31
Red
#120Staryu
15% - Lv 29–31
Blue
#099Kingler
4% - Lv 39
Blue
#117Seadra
4% - Lv 39
Red
#087Dewgong
1% - Lv 37
Fish7
Old Rod1
#129Magikarp
100% - Lv 5
Good Rod2
#118Goldeen
50% - Lv 10
#060Poliwag
50% - Lv 10
Super Rod4
#118Goldeen
25% - Lv 15
#116Horsea
25% - Lv 15
#090Shellder
25% - Lv 15
#120Staryu
25% - Lv 15
▾B4F17
Walking10
#116Horsea
35% - Lv 31–33
Red
#098Krabby
35% - Lv 31–33
Blue
#090Shellder
30% - Lv 31–33
Red
#120Staryu
30% - Lv 31–33
Blue
#054Psyduck
15% - Lv 29–31
Blue
#086Seel
15% - Lv 29–31
#079Slowpoke
15% - Lv 29–31
Red
#055Golduck
4% - Lv 39
Blue
#080Slowbro
4% - Lv 39
Red
#042Golbat
1% - Lv 32
Fish7
Old Rod1
#129Magikarp
100% - Lv 5
Good Rod2
#118Goldeen
50% - Lv 10
#060Poliwag
50% - Lv 10
Super Rod4
#118Goldeen
25% - Lv 15
#116Horsea
25% - Lv 15
#090Shellder
25% - Lv 15
#120Staryu
25% - Lv 15
Legendary
Articuno
#144

Articuno

IceFlying
Level
50
EV yield
3 Sp. Def
Acquisition
Legendary
How to get itB4F
Seafoam Islands B4F, boulder puzzle required
at B4F
Sealed locationB4FSeafoam IslandsView on map
One-of-a-kind. You only get a single shot per cartridge — knock it out or run, and it is gone for the run. Save before engaging.

ITEMS

Seafoam's items are all hidden among the ice, a Nugget, a Max Elixir, and a spare Ultra Ball for catching what lurks deeper in.

Floor
Hidden3
Nugget
B2F
Max Elixir
B3F
Ultra Ball
B4F
HIDDEN

Nugget

Found on B2F · on a rock in the south area of the floor
Effect

Sell for 5000 Pokédollars, or to Ore Collector for 10000 Pokédollars.

Hidden3
HIDDEN

Nugget

Found on B2F · on a rock in the south area of the floor
Effect

Sell for 5000 Pokédollars, or to Ore Collector for 10000 Pokédollars.

HIDDEN

Max Elixir

Found on B3F · on the rock south of the easternmost boulder
Effect

Restores PP to full for each move.

HIDDEN

Ultra Ball

Found on B4F · on the easternmost rock of the rocks in the southeast area of the floor
Effect

Tries to catch a wild Pokémon. Success rate is 2×.

Seafoam Islands Guide

  • With Strength, sink a boulder into each pit you come across. That cuts the rushing water on the floor below down to nothing, opening a Surf path over to Articuno at level 50. Skip the puzzle and you'll just get washed back the way you came.

  • Surf, at the very least. The islands sit out at sea between Fuchsia and Cinnabar, so you ride there over the waves. Strength is the other requirement, used inside for the boulder puzzle, so teach both to one team member before setting out.

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