Gastrodon (West Sea) • Generation VIII Pokédex

Scarlet/Violet support is in the works!

Thank you for your interest in having the Marriland Pokédex updated to support Pokémon Scarlet & Violet! This has been something that I've been wanting to update for awhile, and it is my current project to implement support for the new games and The Teal Mask DLC. Thank you for your patience as I work on this over the coming week or two!

Gastrodon
Pokédex Page for Gastrodon (West Sea)

This is the Marriland Pokédex page for Gastrodon (West Sea), showing its information and moves in Pokémon Sword & Shield as well as Pokémon Brilliant Diamond & Shining Pearl.

To choose which version to view Gastrodon (West Sea)'s moves and location information from, please use the toggle below, or use the toggles further down in the page.

Gastrodon (West Sea)

Gastrodon
Sprite of Gastrodon (West Sea) in Pokémon HOME

Gastrodon (West Sea)'s Type

WATER
GROUND

Gastrodon's Pokédex #s

National #
423
Galar #
231
Armor #
--
Crown #
--
Sinnoh #
61

Gastrodon (West Sea)'s Base Stats

HP:
111
Attack:
83
Defense:
68
Sp. Atk:
92
Sp. Def:
82
Speed:
39
Total:
475

Misc. Info

Height:
2'11" (0.9m)
Weight:
65.9 lbs. (29.9 kg)
Gender Ratio:
Egg Groups:
Water 1 / Amorphous
EXP At Lv. 100:
1,000,000
EV Yield:
2 HP
Base EXP:
166
Catch Rate:
75
Base Happiness:
70

Gastrodon (West Sea)'s Abilities

Here are what abilities Gastrodon (West Sea) can possibly have, along with their effects.
Sticky Hold
Prevents Gastrodon's held item from being removed or switched by other Pokémon.
Storm Drain
Draws in Water moves to Gastrodon, which prevents their damage and raises Gastrodon's Special Attack by one stage.
Sand Force
Gastrodon's Rock-, Ground-, and Steel-type moves do 30% more damage in a sandstorm. Prevents sandstorm damage to Gastrodon.

Weaknesses & Resistances

Below is a list of what Gastrodon's weakness and resistance is to various types.
GRASS
½
FIRE
POISON
ROCK
STEEL
immune
ELECTRIC

Gastrodon's Evolution Line

Below you'll find a list of all Pokémon Gastrodon evolves from or into, along with its evolution method.
Shellos
Shellos (West Sea)
starting form
Gastrodon
Gastrodon (West Sea)
at level 30

Gastrodon's Alternate Forms

Gastrodon (West Sea)'s Moves in Brilliant Diamond & Shining Pearl

Below is a list of all of the moves that Gastrodon (West Sea) can learn, along with what level it learns the move, the TM or TR number, and what egg moves it can learn, if any. Hover over a move (desktop/laptop) or click the ? button next to the move (mobile/tablet) to find out more about the move.

Level Up Moves

Here are all of the moves Gastrodon (West Sea) learns via level up. Anything marked "Evo." means it learns it upon evolving. If the level is 1, it can be relearned at a Pokémon Center.
Lv. Move Type Category Power Acc.% PP Target Info
1
Water Gun
Damages the target.
WATER
SPECIAL
40 100% 25 One Target
1
Mud-Slap
100% chance of lowering the target's Accuracy by one stage.
GROUND
SPECIAL
20 100% 10 One Target
1
Harden
Raises Gastrodon's Defense by one stage.
NORMAL
STATUS
-- -- 30 User
1
Recover
Restores half of Gastrodon's HP.
NORMAL
STATUS
-- -- 10 User
15
Water Pulse
Has a 20% chance of confusing the target.
WATER
SPECIAL
60 100% 20 One Target
20
Ancient Power
Has a 10% chance of raising Gastrodon's Attack, Defense, Sp. Atk, Sp. Def, and Speed by one stage.
ROCK
SPECIAL
60 100% 5 One Target
25
Body Slam
Has a 30% chance to paralyze the target.
NORMAL
PHYSICAL
85 100% 15 One Target
33
Muddy Water
30% chance of lowering all nearby enemies' Accuracy by one stage.
WATER
SPECIAL
90 85% 10 Nearby Enemies
39
Earth Power
10% chance of lowering the target's Sp. Def by one stage.
GROUND
SPECIAL
90 100% 10 One Target
46
Rain Dance
Changes the weather to rainy for 5 turns.
WATER
STATUS
-- -- 5 Entire Field
53
Memento
Lowers the target's Attack and Special Attack by two stages, then Gastrodon faints.
DARK
STATUS
-- 100% 10 One Target

TM Moves

Here are all of the moves that Gastrodon (West Sea) can learn via TM (Technical Machine). These moves can be taught an unlimited number of times once the TM is obtained.
TM Move Type Category Power Acc.% PP Target Info
TM08
Hyper Beam
Requires a turn to recharge (unless it misses).
NORMAL
SPECIAL
150 90% 5 One Target
TM09
Giga Impact
Requires a turn to recharge (unless it misses).
NORMAL
PHYSICAL
150 90% 5 One Target
TM15
Dig
Can't be hit on the first turn, attacks on the second turn.
GROUND
PHYSICAL
80 100% 10 One Target
TM21
Rest
Gastrodon restores its HP to full and falls asleep for two turns.
PSYCHIC
STATUS
-- -- 10 User
TM22
Rock Slide
Has a 30% chance of causing all nearby enemies to flinch.
ROCK
PHYSICAL
75 90% 10 Nearby Enemies
TM24
Snore
Can only be used while asleep. 30% chance of making the target flinch.
NORMAL
SPECIAL
50 100% 15 One Target
TM25
Protect
Protects Gastrodon from attacks for a turn. Low chance of working on consecutive turns.
NORMAL
STATUS
-- -- 10 User
TM27
Icy Wind
100% chance of lowering all nearby enemies' Speed by one stage.
ICE
SPECIAL
55 95% 15 Nearby Enemies
TM31
Attract
Infatuates Pokémon of the opposite gender.
NORMAL
STATUS
-- 100% 15 One Target
TM32
Sandstorm
Changes the weather to a sandstorm for 5 turns.
ROCK
STATUS
-- -- 10 Entire Field
TM33
Rain Dance
Changes the weather to rainy for 5 turns.
WATER
STATUS
-- -- 5 Entire Field
TM35
Hail
Changes the weather to hail for 5 turns.
ICE
STATUS
-- -- 10 Entire Field
TM36
Whirlpool
Traps the target for 2–5 turns; does 1/16 max HP per turn. Deals extra damage to targets using Dive.
WATER
SPECIAL
35 85% 15 One Target
TM39
Facade
Does double damage if Gastrodon is poisoned, burned, or paralyzed.
NORMAL
PHYSICAL
70 100% 20 One Target
TM45
Dive
Can't be hit on the first turn, attacks on the second turn.
WATER
PHYSICAL
80 100% 10 One Target
TM46
Weather Ball
Doubles its power and changes its type based on the weather condition.
NORMAL
SPECIAL
50 100% 10 One Target
TM48
Rock Tomb
100% chance of lowering the target's Speed by one stage.
ROCK
PHYSICAL
60 95% 15 One Target
TM49
Sand Tomb
Traps the target for 4–5 turns, preventing them from switching or fleeing and also doing 1/8 max HP after every turn.
GROUND
PHYSICAL
35 85% 15 One Target
TM53
Mud Shot
100% chance of lowering the target's Speed by one stage.
GROUND
SPECIAL
55 95% 15 One Target
TM55
Brine
Does double damage if the target's HP is 50% or less.
WATER
SPECIAL
65 100% 10 One Target
TM76
Round
Deals double damage if Round has already been used and causes any other Pokémon using Round to use it immediately afterward.
NORMAL
SPECIAL
60 100% 15 One Target
TM81
Bulldoze
100% chance of lowering all nearby Pokémon's Speed by one stage.
GROUND
PHYSICAL
60 100% 20 All But Self
TM98
Stomping Tantrum
Power is doubled if Gastrodon missed the target last turn.
GROUND
PHYSICAL
75 100% 10 One Target

TR Moves

Here are all of the moves that Gastrodon (West Sea) can learn via TR (Technical Record). These moves can be taught only once per TR, but TRs can be obtained in the Wild Area and other locations.
TR Move Type Category Power Acc.% PP Target Info
TR01
Body Slam
Has a 30% chance to paralyze the target.
NORMAL
PHYSICAL
85 100% 15 One Target
TR03
Hydro Pump
Damages the target.
WATER
SPECIAL
110 80% 5 One Target
TR04
Surf
Deals extra damage to targets using Dive.
WATER
SPECIAL
90 100% 15 All But Self
TR05
Ice Beam
Has a 10% chance to freeze the target.
ICE
SPECIAL
90 100% 10 One Target
TR06
Blizzard
Has a 10% chance to freeze all nearby enemies. 100% accuracy while it is hailing.
ICE
SPECIAL
110 70% 5 Nearby Enemies
TR10
Earthquake
Does double damage against targets using Dig.
GROUND
PHYSICAL
100 100% 10 All But Self
TR16
Waterfall
Has a 20% chance of causing the target to flinch.
WATER
PHYSICAL
80 100% 15 One Target
TR17
Amnesia
Raises Gastrodon's Special Defense by two stages.
PSYCHIC
STATUS
-- -- 20 User
TR20
Substitute
Costs 25% of Gastrodon's max HP. Sets up a Substitute to block effects and damage.
NORMAL
STATUS
-- -- 10 User
TR22
Sludge Bomb
Has a 30% chance to poison the target.
POISON
SPECIAL
90 100% 10 One Target
TR26
Endure
Will survive any hit with at least 1 HP left this turn. 50% chance of working on consecutive turns.
NORMAL
STATUS
-- -- 10 User
TR27
Sleep Talk
Can only be used while asleep. Uses one of Gastrodon's moves at random.
NORMAL
STATUS
-- -- 10 User
TR45
Muddy Water
30% chance of lowering all nearby enemies' Accuracy by one stage.
WATER
SPECIAL
90 85% 10 Nearby Enemies
TR67
Earth Power
10% chance of lowering the target's Sp. Def by one stage.
GROUND
SPECIAL
90 100% 10 One Target
TR75
Stone Edge
Has a higher critical hit rate. (+1 stage.)
ROCK
PHYSICAL
100 80% 5 One Target
TR78
Sludge Wave
Has a 10% chance to poison all nearby Pokémon.
POISON
SPECIAL
95 100% 10 All But Self
TR84
Scald
Has a 30% chance to burn the target.
WATER
SPECIAL
80 100% 15 One Target

Egg Moves

Here are all of the moves that Gastrodon (West Sea) can learn as Egg Moves. In the case of evolved Pokémon, it shows what Egg Moves it can learn in its lowest evolutionary stage. Click the word EGG to find compatible breeding Pokémon to get that Egg Move onto Gastrodon (West Sea).
Move Type Category Power Acc.% PP Target Info
EGG
Counter
Counters Physical-based damage received this turn.
FIGHTING
PHYSICAL
varies 100% 20 Counter
EGG
Mirror Coat
Counters Special-based damage received this turn.
PSYCHIC
SPECIAL
varies 100% 20 Counter
EGG
Stockpile
Raises Gastrodon's Defense and Special Defense by one stage and adds +1 to the Stockpile counter, up to 3.
NORMAL
STATUS
-- -- 20 User
EGG
Swallow
Heals HP based on the Stockpile counter, then resets it to 0.
NORMAL
STATUS
-- -- 10 User
EGG
Spit Up
Hits for 100 power for each Stockpile counter. Resets Stockpile counter to 0.
NORMAL
SPECIAL
varies 100% 10 One Target
EGG
Yawn
Makes the target fall asleep at the end of the next turn.
NORMAL
STATUS
-- -- 10 One Target
EGG
Curse
Raises Gastrodon's Attack and Defense by one stage, but lowers its Speed by one stage.
GHOST
STATUS
-- -- 10 Counter
EGG
Sludge
Has a 30% chance to poison the target.
POISON
SPECIAL
65 100% 20 One Target
EGG
Clear Smog
Removes any stat modifiers on the target.
POISON
SPECIAL
50 -- 15 One Target
EGG
Mist
Prevents stats from being lowered for 5 turns.
ICE
STATUS
-- -- 30 User's Field
EGG
Acid Armor
Raises Gastrodon's Defense by two stages.
POISON
STATUS
-- -- 20 User

Move Tutor Moves

Here are all of the moves that Gastrodon (West Sea) can learn from Move Tutors. Most of these require the Expansion Pass and can be found in the Isle of Armor's Dojo, costing some Armorite Ore to teach. However, there are a few moves that can be taught aside from this.
Move Type Category Power Acc.% PP Target Info
TUTOR
Skitter Smack
100% chance of lowering the target's Sp. Atk by one stage.
BUG
PHYSICAL
70 90% 10 One Target

Level Up Moves

Here are all of the moves Gastrodon (West Sea) learns via level up. Anything marked "Evo." means it learns it upon evolving. If the level is 1, it can be relearned at a Pokémon Center.
Lv. Move Type Category Power Acc.% PP Target Info
1
Water Gun
Damages the target.
WATER
SPECIAL
40 100% 25 One Target
1
Mud-Slap
100% chance of lowering the target's Accuracy by one stage.
GROUND
SPECIAL
20 100% 10 One Target
1
Harden
Raises Gastrodon's Defense by one stage.
NORMAL
STATUS
-- -- 30 User
1
Recover
Restores half of Gastrodon's HP.
NORMAL
STATUS
-- -- 10 User
15
Water Pulse
Has a 20% chance of confusing the target.
WATER
SPECIAL
60 100% 20 One Target
20
Ancient Power
Has a 10% chance of raising Gastrodon's Attack, Defense, Sp. Atk, Sp. Def, and Speed by one stage.
ROCK
SPECIAL
60 100% 5 One Target
25
Body Slam
Has a 30% chance to paralyze the target.
NORMAL
PHYSICAL
85 100% 15 One Target
33
Muddy Water
30% chance of lowering all nearby enemies' Accuracy by one stage.
WATER
SPECIAL
90 85% 10 Nearby Enemies
39
Earth Power
10% chance of lowering the target's Sp. Def by one stage.
GROUND
SPECIAL
90 100% 10 One Target
46
Rain Dance
Changes the weather to rainy for 5 turns.
WATER
STATUS
-- -- 5 Entire Field
53
Memento
Lowers the target's Attack and Special Attack by two stages, then Gastrodon faints.
DARK
STATUS
-- 100% 10 One Target

TM Moves

Here are all of the moves that Gastrodon (West Sea) can learn via TM (Technical Machine). These moves can be taught once per use of the TM.
TM Move Type Category Power Acc.% PP Target Info
TM03
Water Pulse
Has a 20% chance of confusing the target.
WATER
SPECIAL
60 100% 20 One Target
TM07
Hail
Changes the weather to hail for 5 turns.
ICE
STATUS
-- -- 10 Entire Field
TM13
Ice Beam
Has a 10% chance to freeze the target.
ICE
SPECIAL
90 100% 10 One Target
TM14
Blizzard
Has a 10% chance to freeze all nearby enemies. 100% accuracy while it is hailing.
ICE
SPECIAL
110 70% 5 Nearby Enemies
TM15
Hyper Beam
Requires a turn to recharge (unless it misses).
NORMAL
SPECIAL
150 90% 5 One Target
TM17
Protect
Protects Gastrodon from attacks for a turn. Low chance of working on consecutive turns.
NORMAL
STATUS
-- -- 10 User
TM18
Rain Dance
Changes the weather to rainy for 5 turns.
WATER
STATUS
-- -- 5 Entire Field
TM26
Earthquake
Does double damage against targets using Dig.
GROUND
PHYSICAL
100 100% 10 All But Self
TM28
Dig
Can't be hit on the first turn, attacks on the second turn.
GROUND
PHYSICAL
80 100% 10 One Target
TM32
Double Team
Raises Gastrodon's Evasion by one stage.
NORMAL
STATUS
-- -- 15 User
TM36
Sludge Bomb
Has a 30% chance to poison the target.
POISON
SPECIAL
90 100% 10 One Target
TM37
Sandstorm
Changes the weather to a sandstorm for 5 turns.
ROCK
STATUS
-- -- 10 Entire Field
TM39
Rock Tomb
100% chance of lowering the target's Speed by one stage.
ROCK
PHYSICAL
60 95% 15 One Target
TM42
Facade
Does double damage if Gastrodon is poisoned, burned, or paralyzed.
NORMAL
PHYSICAL
70 100% 20 One Target
TM44
Rest
Gastrodon restores its HP to full and falls asleep for two turns.
PSYCHIC
STATUS
-- -- 10 User
TM45
Attract
Infatuates Pokémon of the opposite gender.
NORMAL
STATUS
-- 100% 15 One Target
TM49
Scald
Has a 30% chance to burn the target.
WATER
SPECIAL
80 100% 15 One Target
TM55
Brine
Does double damage if the target's HP is 50% or less.
WATER
SPECIAL
65 100% 10 One Target
TM58
Endure
Will survive any hit with at least 1 HP left this turn. 50% chance of working on consecutive turns.
NORMAL
STATUS
-- -- 10 User
TM68
Giga Impact
Requires a turn to recharge (unless it misses).
NORMAL
PHYSICAL
150 90% 5 One Target
TM70
Flash
Lowers the target's Accuracy by one stage.
NORMAL
STATUS
-- 100% 20 One Target
TM71
Stone Edge
Has a higher critical hit rate. (+1 stage.)
ROCK
PHYSICAL
100 80% 5 One Target
TM80
Rock Slide
Has a 30% chance of causing all nearby enemies to flinch.
ROCK
PHYSICAL
75 90% 10 Nearby Enemies
TM82
Sleep Talk
Can only be used while asleep. Uses one of Gastrodon's moves at random.
NORMAL
STATUS
-- -- 10 User
TM83
Bulldoze
100% chance of lowering all nearby Pokémon's Speed by one stage.
GROUND
PHYSICAL
60 100% 20 All But Self
TM87
Swagger
Raises the target's Attack by two stages and confuses it.
NORMAL
STATUS
-- 85% 15 One Target
TM90
Substitute
Costs 25% of Gastrodon's max HP. Sets up a Substitute to block effects and damage.
NORMAL
STATUS
-- -- 10 User
TM95
Surf
Deals extra damage to targets using Dive.
WATER
SPECIAL
90 100% 15 All But Self
TM96
Strength
Damages the target.
NORMAL
PHYSICAL
80 100% 15 One Target
TM98
Rock Smash
50% chance of lowering the target's Defense by one stage.
FIGHTING
PHYSICAL
40 100% 15 One Target
TM99
Waterfall
Has a 20% chance of causing the target to flinch.
WATER
PHYSICAL
80 100% 15 One Target

Egg Moves

Here are all of the moves that Gastrodon (West Sea) can learn as Egg Moves. In the case of evolved Pokémon, it shows what Egg Moves it can learn in its lowest evolutionary stage. Click the word EGG to find compatible breeding Pokémon to get that Egg Move onto Gastrodon (West Sea).
Move Type Category Power Acc.% PP Target Info
EGG
Counter
Counters Physical-based damage received this turn.
FIGHTING
PHYSICAL
varies 100% 20 Counter
EGG
Mirror Coat
Counters Special-based damage received this turn.
PSYCHIC
SPECIAL
varies 100% 20 Counter
EGG
Stockpile
Raises Gastrodon's Defense and Special Defense by one stage and adds +1 to the Stockpile counter, up to 3.
NORMAL
STATUS
-- -- 20 User
EGG
Swallow
Heals HP based on the Stockpile counter, then resets it to 0.
NORMAL
STATUS
-- -- 10 User
EGG
Spit Up
Hits for 100 power for each Stockpile counter. Resets Stockpile counter to 0.
NORMAL
SPECIAL
varies 100% 10 One Target
EGG
Yawn
Makes the target fall asleep at the end of the next turn.
NORMAL
STATUS
-- -- 10 One Target
EGG
Curse
Raises Gastrodon's Attack and Defense by one stage, but lowers its Speed by one stage.
GHOST
STATUS
-- -- 10 Counter
EGG
Sludge
Has a 30% chance to poison the target.
POISON
SPECIAL
65 100% 20 One Target
EGG
Clear Smog
Removes any stat modifiers on the target.
POISON
SPECIAL
50 -- 15 One Target
EGG
Mist
Prevents stats from being lowered for 5 turns.
ICE
STATUS
-- -- 30 User's Field
EGG
Acid Armor
Raises Gastrodon's Defense by two stages.
POISON
STATUS
-- -- 20 User
EGG
Memento
Lowers the target's Attack and Special Attack by two stages, then Gastrodon faints.
DARK
STATUS
-- 100% 10 One Target
EGG
Amnesia
Raises Gastrodon's Special Defense by two stages.
PSYCHIC
STATUS
-- -- 20 User
EGG
Fissure
Knocks out the target. Fails against higher-level Pokémon.
GROUND
PHYSICAL
varies 30% 5 One Target

Gastrodon (West Sea)'s Detailed Stats

Below you'll find a more detailed table containing Gastrodon (West Sea)'s calculated stats, which are the stats that you actually see displayed in game. These are affected by a variety of things, such as level, Effort Values (EVs), Individual Values (IVs), and Gastrodon's Nature.

By default, the stats you see in the table below show four different possibilities, all assuming Gastrodon is level 100: its stats with 0 EVs, 252+ (max) EVs, 0 IVs, and 31 (max) IVs. Nature is not shown by default, so its maximum is 10% higher than shown here, and minium 10% lower.
Stats at
level 100
0 EVs 252+ EVs Base Stat
Min Max Min Max
HP
332 363 395 426 111
Attack
171 202 234 265 83
Defense
141 172 204 235 68
Sp. Atk
189 220 252 283 92
Sp. Def
169 200 232 263 82
Speed
83 114 146 177 39
Total
475

Where to Find Gastrodon (West Sea) in Brilliant Diamond & Shining Pearl

If you're looking for where to find Gastrodon (West Sea), you'll find the various methods listed down below, along with any notes or special locations. This should help you figure out how to get Gastrodon in Pokémon Sword & Shield. (Currently this does not show most "strong" static encounters or Max Raid Battles.)

Special Ways to Get Gastrodon (West Sea)

West Sea Gastrodon is not normally available in Sword/Shield, but can be transferred from Pokémon HOME.

Getting Gastrodon (West Sea) By Evolution

Evolves from West Sea Shellos at level 30.
Location information on where to find Gastrodon (West Sea) in Pokémon Brilliant Diamond & Shining Pearl will be coming to the Marriland Pokédex in a future update! Thank you for your patience!

Pokédex Entries for Gastrodon

Generation 8 Pokédex Entries

West Sea

Sword
Its search for food sometimes leads it onto land, where it leaves behind a sticky trail of slime as it passes through.
Shield
The softness of its body helps disperse the force of impacts, so although its body is uncommonly squishy, it's also surprisingly resilient.

East Sea

Sword
It secretes a purple fluid to deter enemies. This fluid isn't poisonous—instead, it's super sticky, and once it sticks, it's very hard to unstick.
Shield
Its body is covered in a sticky slime. It's very susceptible to dehydration, so it can't spend too much time on land.

Generation 7 Pokédex Entries

West Sea

Sun
It has strong regenerative capabilities. Even if parts of it are bitten off by fish Pokémon, it will return to normal within a few hours.
Moon
Plankton, invisible to the naked eye, is its main food source. It comes onto the land periodically, but the reason for this is not known.
Ultra Sun
Long ago, it had a shell on its back. There's now a vestigial plate on its back that's hard but thin.
Ultra Moon
Their shape and color change, depending on their environment and diet. There are many of them at beaches where the waves are calm.

Generation 6 Pokédex Entries

West Sea

X Omega Ruby
When its natural enemy attacks, it oozes purple fluid and escapes.
Y Alpha Sapphire
It apparently had a huge shell for protection in ancient times. It lives in shallow tidal pools.

Generation 5 Pokédex Entries

West Sea

Black White Black 2 White 2
Long ago, its entire back was shielded with a sturdy shell. There are traces of it left in its cells.

Generation 4 Pokédex Entries

West Sea

Diamond
It has a pliable body without any bones. If any part of its body is torn off, it grows right back.
Pearl
It apparently had a huge shell for protection in ancient times. It lives in shallow tidal pools.
Platinum
Long ago, its entire back was shielded with a sturdy shell. There are traces of it left in its cells.
HeartGold SoulSilver
When its natural enemy attacks, it oozes purple fluid and escapes.
©2000–2012, 2016–2024 Marriland and its licensors. All rights reserved.
Pokémon characters and names are copyright © The Pokémon Company and/or Nintendo.