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USUM / Pokédex

Gastrodon East

Back to Pokédex

Gastrodon East

#342 in the Ultra Sun & Ultra Moon Pokédex • Sea Slug Pokémon

Gastrodon East sprite

Normal

Shiny Gastrodon East sprite

Shiny

Pokédex entries

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.

Details

Types

WaterGround

Category

Sea Slug Pokémon

Height

0.9 m (2'11")

Weight

29.9 kg (65.9 lbs)

National Pokédex

#0423

Pokédex

#342

Stats

Base stat spread shown as a hex chart and supporting stat bars.

Min

Max

HP

111

332

426

Attack

83

153

291

Defense

68

126

258

Sp. Atk

92

170

311

Sp. Def

82

152

289

Speed

39

74

194

Total

475

Ranges are for Level 100. Max assumes a beneficial nature, 252 EVs, and 31 IVs; min assumes a hindering nature, 0 EVs, and 0 IVs.

It's Super Effective

Type-only matchups for Gastrodon East, sorted from worst weakness to best resistance. Abilities, held items and battle conditions can change the damage taken.

Weak to

Immune to

Growth

EV yield, catch rate, and experience details for this Pokémon.
Pokédexes
Alola #342Poni #89
EV yield
2 HP
Catch rate
75
Base Exp.
166

Eggs

Egg groups, gender ratio, and hatching details for this Pokémon.
Egg groups
Gender
50% male
50% female
Egg cycles
20

Evolution

Evolution requirements shown in a compact table or chain view.
PokémonRequiresEvolution
Shellos

Shellos

#341

Level up East Sea Shellos at level 30 or higher; its East Sea form is preserved.

Gastrodon

Gastrodon

#342

Encounters

Known encounter locations for this Pokémon in this game.
Ultra Moon
LocationMethodLevelChanceConditions

Exeggutor Island

Walking in tall grass or a cave42-4510%

-

Poni Breaker Coast

Surfing41-4420%

-

Ancient Poni Path

Walking in tall grass or a cave41-4410%

-

Poni Wilds

Walking in tall grass or a cave41-4410%

-

Ultra Sun
LocationMethodLevelChanceConditions

Ancient Poni Path

Walking in tall grass or a cave41-4410%

-

Exeggutor Island

Walking in tall grass or a cave42-4510%

-

Poni Wilds

Walking in tall grass or a cave41-4410%

-

Poni Breaker Coast

Surfing41-4420%

-

Moves

Moves this Pokémon learns naturally by reaching specific levels.
Class
Description
StartHardenNormalStatus--30

The user stiffens all the muscles in its body to raise its Defense stat.

StartMud-SlapGroundSpecial2010010

The user hurls mud in the target’s face to inflict damage and lower its accuracy.

StartMud SportGroundStatus--15

The user kicks up mud on the battlefield. This weakens Electric-type moves for five turns.

StartWater PulseWaterSpecial6010020

The user attacks the target with a pulsing blast of water. This may also confuse the target.

2Mud SportGroundStatus--15

The user kicks up mud on the battlefield. This weakens Electric-type moves for five turns.

4HardenNormalStatus--30

The user stiffens all the muscles in its body to raise its Defense stat.

7Water PulseWaterSpecial6010020

The user attacks the target with a pulsing blast of water. This may also confuse the target.

11Mud BombGroundSpecial658510

The user launches a hard-packed mud ball to attack. This may also lower the target’s accuracy.

16Hidden PowerNormalSpecial6010015

A unique attack that varies in type depending on the Pokémon using it.

22Rain DanceWaterStatus--5

The user summons a heavy rain that falls for five turns, powering up Water-type moves. It lowers the power of Fire-type moves.

29Body SlamNormalPhysical8510015

The user drops onto the target with its full body weight. This may also leave the target with paralysis.

41Muddy WaterWaterSpecial908510

The user attacks by shooting muddy water at the opposing Pokémon. This may also lower their accuracy.

54RecoverNormalStatus--10

Restoring its own cells, the user restores its own HP by half of its max HP.

Machines

Moves this Pokémon can learn from Technical Machines in Pokémon Ultra Sun and Ultra Moon.
Class
Description
TM06ToxicPoisonStatus-9010

A move that leaves the target badly poisoned. Its poison damage worsens every turn.

TM07HailIceStatus--10

The user summons a hailstorm lasting five turns. It damages all Pokémon except the Ice type.

TM10Hidden PowerNormalSpecial6010015

A unique attack that varies in type depending on the Pokémon using it.

TM13Ice BeamIceSpecial9010010

The target is struck with an icy-cold beam of energy. This may also leave the target frozen.

TM14BlizzardIceSpecial110705

A howling blizzard is summoned to strike opposing Pokémon. This may also leave the opposing Pokémon frozen.

TM15Hyper BeamNormalSpecial150905

The target is attacked with a powerful beam. The user can’t move on the next turn.

TM17ProtectNormalStatus--10

Enables the user to evade all attacks. Its chance of failing rises if it is used in succession.

TM18Rain DanceWaterStatus--5

The user summons a heavy rain that falls for five turns, powering up Water-type moves. It lowers the power of Fire-type moves.

TM21FrustrationNormalPhysical-10020

This full-power attack grows more powerful the less the user likes its Trainer.

TM26EarthquakeGroundPhysical10010010

The user sets off an earthquake that strikes every Pokémon around it.

TM27ReturnNormalPhysical-10020

This full-power attack grows more powerful the more the user likes its Trainer.

TM32Double TeamNormalStatus--15

By moving rapidly, the user makes illusory copies of itself to raise its evasiveness.

TM34Sludge WavePoisonSpecial9510010

The user strikes everything around it by swamping the area with a giant sludge wave. This may also poison those hit.

TM36Sludge BombPoisonSpecial9010010

Unsanitary sludge is hurled at the target. This may also poison the target.

TM37SandstormRockStatus--10

A five-turn sandstorm is summoned to hurt all combatants except the Rock, Ground, and Steel types. It raises the Sp. Def stat of Rock types.

TM39Rock TombRockPhysical609515

Boulders are hurled at the target. This also lowers the target’s Speed stat by preventing its movement.

TM42FacadeNormalPhysical7010020

This attack move doubles its power if the user is poisoned, burned, or paralyzed.

TM44RestPsychicStatus--10

The user goes to sleep for two turns. This fully restores the user’s HP and heals any status conditions.

TM45AttractNormalStatus-10015

If it is the opposite gender of the user, the target becomes infatuated and less likely to attack.

TM48RoundNormalSpecial6010015

The user attacks the target with a song. Others can join in the Round to increase the power of the attack.

TM55ScaldWaterSpecial8010015

The user shoots boiling hot water at its target. This may also leave the target with a burn.

TM68Giga ImpactNormalPhysical150905

The user charges at the target using every bit of its power. The user can’t move on the next turn.

TM71Stone EdgeRockPhysical100805

The user stabs the target from below with sharpened stones. Critical hits land more easily.

TM78BulldozeGroundPhysical6010020

The user strikes everything around it by stomping down on the ground. This lowers the Speed stat of those hit.

TM80Rock SlideRockPhysical759010

Large boulders are hurled at the opposing Pokémon to inflict damage. This may also make the opposing Pokémon flinch.

TM83InfestationBugSpecial2010020

The target is infested and attacked for four to five turns. The target can’t flee during this time.

TM87SwaggerNormalStatus-8515

The user enrages and confuses the target. However, this also sharply raises the target’s Attack stat.

TM88Sleep TalkNormalStatus--10

While it is asleep, the user randomly uses one of the moves it knows.

TM90SubstituteNormalStatus--10

The user makes a copy of itself using some of its HP. The copy serves as the user’s decoy.

TM94SurfWaterSpecial9010015

The user attacks everything around it by swamping its surroundings with a giant wave.

TM98WaterfallWaterPhysical8010015

The user charges at the target and may make it flinch.

TM100ConfideNormalStatus--20

The user tells the target a secret, and the target loses its ability to concentrate. This lowers the target’s Sp. Atk stat.

Tutors

Moves this Pokémon can learn from move tutors in this game.
Class
Description
BlockNormalStatus--5

The user blocks the target’s way with arms spread wide to prevent escape.

Earth PowerGroundSpecial9010010

The user makes the ground under the target erupt with power. This may also lower the target’s Sp. Def stat.

Icy WindIceSpecial559515

The user attacks with a gust of chilled air. This also lowers the opposing Pokémon’s Speed stats.

Pain SplitNormalStatus--20

The user adds its HP to the target’s HP, then equally shares the combined HP with the target.

SnoreNormalSpecial5010015

This attack can be used only if the user is asleep. The harsh noise may also make the target flinch.

Stomping TantrumGroundPhysical7510010

Driven by frustration, the user attacks the target. If the user’s previous move has failed, the power of this move doubles.

Water PulseWaterSpecial6010020

The user attacks the target with a pulsing blast of water. This may also confuse the target.

Learn before evolving and retain the move. Breeding and prior stages have separate requirements.
Class
Acquisition sourceDescription
Acid ArmorPoisonStatus--20

Shellos East — breeding; retain through evolution

The user alters its cellular structure to liquefy itself, sharply raising its Defense stat.

Acid ArmorPoisonStatus--20

Shellos — breeding; retain through evolution

The user alters its cellular structure to liquefy itself, sharply raising its Defense stat.

AmnesiaPsychicStatus--20

Shellos East — breeding; retain through evolution

The user temporarily empties its mind to forget its concerns. This sharply raises the user’s Sp. Def stat.

AmnesiaPsychicStatus--20

Shellos — breeding; retain through evolution

The user temporarily empties its mind to forget its concerns. This sharply raises the user’s Sp. Def stat.

BrineWaterSpecial6510010

Shellos East — breeding; retain through evolution

If the target’s HP is half or less, this attack will hit with double the power.

BrineWaterSpecial6510010

Shellos — breeding; retain through evolution

If the target’s HP is half or less, this attack will hit with double the power.

Clear SmogPoisonSpecial50-15

Shellos East — breeding; retain through evolution

The user attacks by throwing a clump of special mud. All stat changes are returned to normal.

Clear SmogPoisonSpecial50-15

Shellos — breeding; retain through evolution

The user attacks by throwing a clump of special mud. All stat changes are returned to normal.

CounterFightingPhysical-10020

Shellos East — breeding; retain through evolution

A retaliation move that counters any physical attack, inflicting double the damage taken.

CounterFightingPhysical-10020

Shellos — breeding; retain through evolution

A retaliation move that counters any physical attack, inflicting double the damage taken.

CurseGhostStatus--10

Shellos East — breeding; retain through evolution

A move that works differently for the Ghost type than for all other types.

CurseGhostStatus--10

Shellos — breeding; retain through evolution

A move that works differently for the Ghost type than for all other types.

FissureGroundPhysical-305

Shellos East — breeding; retain through evolution

The user opens up a fissure in the ground and drops the target in. The target faints instantly if this attack hits.

FissureGroundPhysical-305

Shellos — breeding; retain through evolution

The user opens up a fissure in the ground and drops the target in. The target faints instantly if this attack hits.

MementoDarkStatus-10010

Shellos East — breeding; retain through evolution

The user faints when using this move. In return, this harshly lowers the target’s Attack and Sp. Atk stats.

MementoDarkStatus-10010

Shellos — breeding; retain through evolution

The user faints when using this move. In return, this harshly lowers the target’s Attack and Sp. Atk stats.

Mirror CoatPsychicSpecial-10020

Shellos East — breeding; retain through evolution

A retaliation move that counters any special attack, inflicting double the damage taken.

Mirror CoatPsychicSpecial-10020

Shellos — breeding; retain through evolution

A retaliation move that counters any special attack, inflicting double the damage taken.

MistIceStatus--30

Shellos East — breeding; retain through evolution

The user cloaks itself and its allies in a white mist that prevents any of their stats from being lowered for five turns.

MistIceStatus--30

Shellos — breeding; retain through evolution

The user cloaks itself and its allies in a white mist that prevents any of their stats from being lowered for five turns.

SludgePoisonSpecial6510020

Shellos East — breeding; retain through evolution

Unsanitary sludge is hurled at the target. This may also poison the target.

SludgePoisonSpecial6510020

Shellos — breeding; retain through evolution

Unsanitary sludge is hurled at the target. This may also poison the target.

Spit UpNormalSpecial-10010

Shellos East — breeding; retain through evolution

The power stored using the move Stockpile is released at once in an attack. The more power is stored, the greater the move’s power.

Spit UpNormalSpecial-10010

Shellos — breeding; retain through evolution

The power stored using the move Stockpile is released at once in an attack. The more power is stored, the greater the move’s power.

StockpileNormalStatus--20

Shellos East — breeding; retain through evolution

The user charges up power and raises both its Defense and Sp. Def stats. The move can be used three times.

StockpileNormalStatus--20

Shellos — breeding; retain through evolution

The user charges up power and raises both its Defense and Sp. Def stats. The move can be used three times.

SwallowNormalStatus--10

Shellos East — breeding; retain through evolution

The power stored using the move Stockpile is absorbed by the user to heal its HP. Storing more power heals more HP.

SwallowNormalStatus--10

Shellos — breeding; retain through evolution

The power stored using the move Stockpile is absorbed by the user to heal its HP. Storing more power heals more HP.

Trump CardNormalSpecial--5

Shellos East — breeding; retain through evolution

The fewer PP this move has, the greater its power.

Trump CardNormalSpecial--5

Shellos — breeding; retain through evolution

The fewer PP this move has, the greater its power.

YawnNormalStatus--10

Shellos East — breeding; retain through evolution

The user lets loose a huge yawn that lulls the target into falling asleep on the next turn.

YawnNormalStatus--10

Shellos — breeding; retain through evolution

The user lets loose a huge yawn that lulls the target into falling asleep on the next turn.

Imports, special breeding, event gifts and copied moves have separate requirements. Individual options do not guarantee every four-move combination; historical transfer services require eligible software and Pokémon.
Class
Acquisition sourceDescription
Acid ArmorPoisonStatus--20

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user alters its cellular structure to liquefy itself, sharply raising its Defense stat.

AmnesiaPsychicStatus--20

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user temporarily empties its mind to forget its concerns. This sharply raises the user’s Sp. Def stat.

Ancient PowerRockSpecial601005

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user attacks with a prehistoric power. This may also raise all the user’s stats at once.

BrineWaterSpecial6510010

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

If the target’s HP is half or less, this attack will hit with double the power.

CaptivateNormalStatus-10020

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

If any opposing Pokémon is the opposite gender of the user, it is charmed, which harshly lowers its Sp. Atk stat.

Clear SmogPoisonSpecial50-15

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user attacks by throwing a clump of special mud. All stat changes are returned to normal.

CounterFightingPhysical-10020

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

A retaliation move that counters any physical attack, inflicting double the damage taken.

CurseGhostStatus--10

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

A move that works differently for the Ghost type than for all other types.

DiveWaterPhysical8010010

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

Diving on the first turn, the user floats up and attacks on the next turn.

EndureNormalStatus--10

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user endures any attack with at least 1 HP. Its chance of failing rises if it is used in succession.

FissureGroundPhysical-305

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user opens up a fissure in the ground and drops the target in. The target faints instantly if this attack hits.

HeadbuttNormalPhysical7010015

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user sticks out its head and attacks by charging straight into the target. This may also make the target flinch.

MementoDarkStatus-10010

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user faints when using this move. In return, this harshly lowers the target’s Attack and Sp. Atk stats.

Mirror CoatPsychicSpecial-10020

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

A retaliation move that counters any special attack, inflicting double the damage taken.

MistIceStatus--30

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user cloaks itself and its allies in a white mist that prevents any of their stats from being lowered for five turns.

Natural GiftNormalPhysical-10015

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user draws power to attack by using its held Berry. The Berry determines the move’s type and power.

Secret PowerNormalPhysical7010020

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The additional effects of this attack depend upon where it was used.

SludgePoisonSpecial6510020

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

Unsanitary sludge is hurled at the target. This may also poison the target.

Spit UpNormalSpecial-10010

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The power stored using the move Stockpile is released at once in an attack. The more power is stored, the greater the move’s power.

StockpileNormalStatus--20

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user charges up power and raises both its Defense and Sp. Def stats. The move can be used three times.

String ShotBugStatus-9540

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The opposing Pokémon are bound with silk blown from the user’s mouth that harshly lowers the Speed stat.

SwallowNormalStatus--10

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The power stored using the move Stockpile is absorbed by the user to heal its HP. Storing more power heals more HP.

Trump CardNormalSpecial--5

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The fewer PP this move has, the greater its power.

WhirlpoolWaterSpecial358515

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user traps the target in a violent swirling whirlpool for four to five turns.

YawnNormalStatus--10

Import from compatible Generation III–VI games using the required transfer chain and Pokémon Bank; retain through evolution where applicable

The user lets loose a huge yawn that lulls the target into falling asleep on the next turn.

Traits

Ability options available to this Pokémon in this game.

Sticky Hold

Ability Slot 1

Items held by the Pokémon are stuck fast and cannot be removed by other Pokémon.

Prevents a held item from being removed by other Pokémon.

Storm Drain

Ability Slot 2

Draws in all Water-type moves. Instead of being hit by Water-type moves, it boosts its Sp. Atk.

Redirects single-target Water-type moves to this Pokémon where possible. Absorbs Water-type moves, raising Special Attack one stage.

Sand Force(Hidden Ability)

Boosts the power of Rock-, Ground-, and Steel-type moves in a sandstorm.

Strengthens Rock-, Ground-, and Steel-type moves to 1.3× their power during a sandstorm. Protects against sandstorm damage.

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