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Gastrodon

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Gastrodon in Pokémon X & Y

#423 in the X and Y Pokédex • Sea Slug Pokémon

Gastrodon in the National Pokédex
Gastrodon sprite

Normal

Shiny Gastrodon sprite

Shiny

Pokédex entries

Pokémon X

When its natural enemy attacks, it oozes purple fluid and escapes.

Pokémon Y

It apparently had a huge shell for protection in ancient times. It lives in shallow tidal pools.

Pokémon details

Types

WaterGround

Category

Sea Slug Pokémon

Height

0.9 m (2'11")

Weight

29.9 kg (65.9 lbs)

National Pokédex

#0423

Gastrodon in Other Games

National Dex page

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.

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

Weak to

Immune to

EV yield, catch rate, and experience details for this Pokémon.
Pokédexes
-
EV yield
2 HP
Catch rate
75
Base Exp.
166

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

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

Shellos

#422

Level 30

Gastrodon

Gastrodon

#423

Known encounter locations for this Pokémon in this game.
X
LocationMethodLevelChanceConditions

Friend Safari

Friend Safari (Ground)

Walking in tall grass or a cave30-

Randomly assigned to Friend Safari Slot 3, Requires a registered 3DS friend. Each unlocked encounter slot has equal probability: 50% with two slots or approximately 33.3% with three. The candidate depends on that friend’s Safari., Friend must enter the Hall of Fame and meet you in the PSS. Since Nintendo Network closed in April 2024, new third-slot and Hidden Ability unlocks require local play together; earlier online unlocks remain available.

Y
LocationMethodLevelChanceConditions

Friend Safari

Friend Safari (Ground)

Walking in tall grass or a cave30-

Randomly assigned to Friend Safari Slot 3, Requires a registered 3DS friend. Each unlocked encounter slot has equal probability: 50% with two slots or approximately 33.3% with three. The candidate depends on that friend’s Safari., Friend must enter the Hall of Fame and meet you in the PSS. Since Nintendo Network closed in April 2024, new third-slot and Hidden Ability unlocks require local play together; earlier online unlocks remain available.

Moves this Pokémon learns naturally by reaching specific levels.
Class
StartHarden

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

Normal--30
StartMud-Slap

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

Ground2010010
StartMud Sport

The user covers itself with mud. This weakens Electric-type moves for five turns.

Ground--15
StartWater Pulse

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

Water6010020
2Mud Sport

The user covers itself with mud. This weakens Electric-type moves for five turns.

Ground--15
4Harden

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

Normal--30
7Water Pulse

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

Water6010020
11Mud Bomb

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

Ground658510
16Hidden Power

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

Normal6010015
22Rain Dance

The user summons a heavy rain that falls for five turns, powering up Water-type moves.

Water--5
29Body Slam

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

Normal8510015
41Muddy Water

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

Water908510
54Recover

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

Normal--10

Moves this Pokémon can learn from Technical Machines and Hidden Machines in Pokémon X and Y.
Class
TM06Toxic

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

Poison-9010
TM07Hail

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

Ice--10
TM10Hidden Power

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

Normal6010015
TM13Ice Beam

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

Ice9010010
TM14Blizzard

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

Ice110705
TM15Hyper Beam

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

Normal150905
TM17Protect

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

Normal--10
TM18Rain Dance

The user summons a heavy rain that falls for five turns, powering up Water-type moves.

Water--5
TM21Frustration

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

Normal-10020
TM26Earthquake

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

Ground10010010
TM27Return

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

Normal-10020
TM28Dig

The user burrows, then attacks on the next turn. It can also be used to exit dungeons.

Ground8010010
TM32Double Team

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

Normal--15
TM34Sludge Wave

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

Poison9510010
TM36Sludge Bomb

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

Poison9010010
TM37Sandstorm

A five-turn sandstorm is summoned to hurt all combatants except the Rock, Ground, and Steel types.

Rock--10
TM39Rock Tomb

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

Rock609515
TM42Facade

An attack move that doubles its power if the user is poisoned, burned, or has paralysis.

Normal7010020
TM44Rest

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

Psychic--10
TM45Attract

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

Normal-10015
TM48Round

The user attacks the target with a song. Others can join in the Round and make the attack do greater damage.

Normal6010015
TM55Scald

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

Water8010015
TM68Giga Impact

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

Normal150905
TM70Flash

The user flashes a bright light that cuts the target’s accuracy.

Normal-10020
TM71Stone Edge

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

Rock100805
TM78Bulldoze

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

Ground6010020
TM80Rock Slide

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

Rock759010
TM83Infestation

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

Bug2010020
TM87Swagger

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

Normal-9015
TM88Sleep Talk

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

Normal--10
TM90Substitute

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

Normal--10
TM94Rock Smash

The user attacks with a punch. This may also lower the target’s Defense stat. This move can also shatter rocks in the field.

Fighting4010015
TM100Confide

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

Normal--20
HM03Surf

The user attacks everything around it by swamping its surroundings with a giant wave. This can also be used for crossing water.

Water9010015
HM04Strength

The target is slugged with a punch thrown at maximum power. This can also be used to move heavy boulders.

Normal8010015
HM05Waterfall

The user charges at the target and may make it flinch. This can also be used to climb a waterfall.

Water8010015

Learn these before evolving. The source identifies the original method and level where applicable.
Class
Acquisition source
Acid Armor

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

Poison--20

Shellos — breeding

Amnesia

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

Psychic--20

Shellos — breeding

Brine

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

Water6510010

Shellos — breeding

Clear Smog

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

Poison50-15

Shellos — breeding

Counter

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

Fighting-10020

Shellos — breeding

Curse

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

Ghost--10

Shellos — breeding

Fissure

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

Ground-305

Shellos — breeding

Memento

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

Dark-10010

Shellos — breeding

Mirror Coat

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

Psychic-10020

Shellos — breeding

Mist

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

Ice--30

Shellos — breeding

Sludge

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

Poison6510020

Shellos — breeding

Spit Up

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.

Normal-10010

Shellos — breeding

Stockpile

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

Normal--20

Shellos — breeding

Swallow

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

Normal--10

Shellos — breeding

Trump Card

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

Normal--5

Shellos — breeding

Yawn

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

Normal--10

Shellos — breeding

These require the labeled trade, transfer or breeding route. Generation III/IV imports must first reach Generation V; Virtual Console Pokémon cannot be imported into X/Y. Kyurem must be unfused for transfer. Individual options do not certify every four-move combination.
Class
Acquisition source
Amnesia

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

Psychic--20

Generation III–V import via Poké Transporter and Pokémon Bank

Ancient Power

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

Rock601005

Generation III–V import via Poké Transporter and Pokémon Bank

Block

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

Normal--5

Generation III–V import via Poké Transporter and Pokémon Bank

Block

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

Normal--5

Trade from Omega Ruby/Alpha Sapphire; XY-compatible moves only

Brine

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

Water6510010

Generation III–V import via Poké Transporter and Pokémon Bank

Captivate

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

Normal-10020

Generation III–V import via Poké Transporter and Pokémon Bank

Clear Smog

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

Poison50-15

Generation III–V import via Poké Transporter and Pokémon Bank

Counter

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

Fighting-10020

Generation III–V import via Poké Transporter and Pokémon Bank

Curse

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

Ghost--10

Generation III–V import via Poké Transporter and Pokémon Bank

Dive

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

Water8010010

Generation III–V import via Poké Transporter and Pokémon Bank

Dive

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

Water8010010

Trade from Omega Ruby/Alpha Sapphire; XY-compatible moves only

Earth Power

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

Ground9010010

Generation III–V import via Poké Transporter and Pokémon Bank

Earth Power

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

Ground9010010

Trade from Omega Ruby/Alpha Sapphire; XY-compatible moves only

Endure

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

Normal--10

Generation III–V import via Poké Transporter and Pokémon Bank

Fissure

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

Ground-305

Generation III–V import via Poké Transporter and Pokémon Bank

Headbutt

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

Normal7010015

Generation III–V import via Poké Transporter and Pokémon Bank

Icy Wind

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

Ice559515

Generation III–V import via Poké Transporter and Pokémon Bank

Icy Wind

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

Ice559515

Trade from Omega Ruby/Alpha Sapphire; XY-compatible moves only

Memento

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

Dark-10010

Generation III–V import via Poké Transporter and Pokémon Bank

Mirror Coat

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

Psychic-10020

Generation III–V import via Poké Transporter and Pokémon Bank

Mist

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

Ice--30

Generation III–V import via Poké Transporter and Pokémon Bank

Natural Gift

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

Normal-10015

Generation III–V import via Poké Transporter and Pokémon Bank

Pain Split

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

Normal--20

Generation III–V import via Poké Transporter and Pokémon Bank

Pain Split

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

Normal--20

Trade from Omega Ruby/Alpha Sapphire; XY-compatible moves only

Secret Power

The user attacks the target with a secret power. Its additional effects vary depending on the user’s environment.

Normal7010020

Generation III–V import via Poké Transporter and Pokémon Bank

Secret Power

The user attacks the target with a secret power. Its additional effects vary depending on the user’s environment.

Normal7010020

Trade from Omega Ruby/Alpha Sapphire; XY-compatible moves only

Sludge

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

Poison6510020

Generation III–V import via Poké Transporter and Pokémon Bank

Snore

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

Normal5010015

Generation III–V import via Poké Transporter and Pokémon Bank

Snore

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

Normal5010015

Trade from Omega Ruby/Alpha Sapphire; XY-compatible moves only

Spit Up

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.

Normal-10010

Generation III–V import via Poké Transporter and Pokémon Bank

Stockpile

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

Normal--20

Generation III–V import via Poké Transporter and Pokémon Bank

String Shot

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

Bug-9540

Generation III–V import via Poké Transporter and Pokémon Bank

Swallow

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

Normal--10

Generation III–V import via Poké Transporter and Pokémon Bank

Trump Card

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

Normal--5

Generation III–V import via Poké Transporter and Pokémon Bank

Whirlpool

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

Water358515

Generation III–V import via Poké Transporter and Pokémon Bank

Yawn

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

Normal--10

Generation III–V import via Poké Transporter and Pokémon Bank

Ability options available to this Pokémon in this game.

Sticky Hold

Ability Slot 1

Protects the Pokémon from item theft.

Prevents a held item from being removed by other Pokémon.

Storm Drain

Ability Slot 2

Draws in all Water-type moves to boost its Sp. Atk stat.

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

Sand Force(Hidden Ability)

Boosts certain moves’ power in a sandstorm.

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

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