Home › Pokédex › Gastrodon
#0423 · Generation IV

Gastrodon

Water / Ground · Sea Slug Pokémon — first seen in Generation IV.

Showing the official games. Pick a ROM hack to see how it changes this Pokémon, or compare all of them.

Base stats

StatBaseMinMax
HP111
332426
Attack83
153291
Defense68
126258
Sp. Attack92
170311
Sp. Defense82
152289
Speed39
74194
Total475

Min and max are at level 100: the minimum is 0 IVs, 0 EVs and a hindering nature, the maximum 31 IVs, 252 EVs and a beneficial nature. Shedinja's HP is always 1 whatever the formula says.

Type defences

Damage Gastrodon takes from each attacking type.

×4
Grass
×½
PoisonRockSteelFire
×0
Electric
×1
NormalFightingFlyingGroundBugGhostWaterPsychicIceDragonDarkFairy

Evolution

Methods are the current official ones. A ROM hack may change them — trade evolutions especially; the guide table below says which do.

In the ROM hacks it evolves differently

Each guide's own line, in the words its creator published.

In Poke47

Evolves into Gastrodon (East) — Level up: 30Evolves into Gastrodon (West) — Level up: 30GastrodonGastrodon

Moves by official game

Level-up, TM/HM, tutor and egg moves exactly as each game has them. The newest game this site covers is open; the rest fold out.

Ultra Sun / Ultra Moon13 level-up · 32 TM/HM · 7 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
1Mud SportGroundStatus——15
1Water PulseWaterSpecial60100%20
2Mud SportGroundStatus——15
4HardenNormalStatus——30
7Water PulseWaterSpecial60100%20
11Mud BombGroundSpecial6585%10
16Hidden PowerNormalSpecial60100%15
22Rain DanceWaterStatus——5
29Body SlamNormalPhysical85100%15
41Muddy WaterWaterSpecial9085%10
54RecoverNormalStatus——5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus—90%10
TM07HailIceStatus——10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus——20
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM32Double TeamNormalStatus——15
TM34Sludge WavePoisonSpecial95100%10
TM36Sludge BombPoisonSpecial90100%10
TM37SandstormRockStatus——10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM48RoundNormalSpecial60100%15
TM55ScaldWaterSpecial80100%15
TM68Giga ImpactNormalPhysical15090%5
TM71Stone EdgeRockPhysical10080%5
TM78BulldozeGroundPhysical60100%20
TM80Rock SlideRockPhysical7590%10
TM83InfestationBugSpecial20100%20
TM87SwaggerNormalStatus—85%15
TM88Sleep TalkNormalStatus——10
TM90SubstituteNormalStatus——10
TM94SurfWaterSpecial90100%15
TM98WaterfallWaterPhysical80100%15

Move tutor

MoveTypeCat.PowerAcc.PP
SnoreNormalSpecial50100%15
Icy WindIceSpecial5595%15
Pain SplitNormalStatus——20
BlockNormalStatus——5
Water PulseWaterSpecial60100%20
Earth PowerGroundSpecial90100%10
Stomping TantrumGroundPhysical75100%10
Sun / Moon13 level-up · 32 TM/HM

Level-up

LvMoveTypeCat.PowerAcc.PP
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
1Mud SportGroundStatus——15
1Water PulseWaterSpecial60100%20
2Mud SportGroundStatus——15
4HardenNormalStatus——30
7Water PulseWaterSpecial60100%20
11Mud BombGroundSpecial6585%10
16Hidden PowerNormalSpecial60100%15
22Rain DanceWaterStatus——5
29Body SlamNormalPhysical85100%15
41Muddy WaterWaterSpecial9085%10
54RecoverNormalStatus——5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus—90%10
TM07HailIceStatus——10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus——20
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM32Double TeamNormalStatus——15
TM34Sludge WavePoisonSpecial95100%10
TM36Sludge BombPoisonSpecial90100%10
TM37SandstormRockStatus——10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM48RoundNormalSpecial60100%15
TM55ScaldWaterSpecial80100%15
TM68Giga ImpactNormalPhysical15090%5
TM71Stone EdgeRockPhysical10080%5
TM78BulldozeGroundPhysical60100%20
TM80Rock SlideRockPhysical7590%10
TM83InfestationBugSpecial20100%20
TM87SwaggerNormalStatus—85%15
TM88Sleep TalkNormalStatus——10
TM90SubstituteNormalStatus——10
TM94SurfWaterSpecial90100%15
TM98WaterfallWaterPhysical80100%15
Omega Ruby / Alpha Sapphire13 level-up · 38 TM/HM · 6 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
1Mud SportGroundStatus——15
1Water PulseWaterSpecial60100%20
2Mud SportGroundStatus——15
4HardenNormalStatus——30
7Water PulseWaterSpecial60100%20
11Mud BombGroundSpecial6585%10
16Hidden PowerNormalSpecial60100%15
22Rain DanceWaterStatus——5
29Body SlamNormalPhysical85100%15
41Muddy WaterWaterSpecial9085%10
54RecoverNormalStatus——5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus—90%10
TM07HailIceStatus——10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus——20
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM28DigGroundPhysical80100%10
TM32Double TeamNormalStatus——15
TM34Sludge WavePoisonSpecial95100%10
TM36Sludge BombPoisonSpecial90100%10
TM37SandstormRockStatus——10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM48RoundNormalSpecial60100%15
TM55ScaldWaterSpecial80100%15
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus—100%20
TM71Stone EdgeRockPhysical10080%5
TM78BulldozeGroundPhysical60100%20
TM80Rock SlideRockPhysical7590%10
TM83InfestationBugSpecial20100%20
TM87SwaggerNormalStatus—85%15
TM88Sleep TalkNormalStatus——10
TM90SubstituteNormalStatus——10
TM94Secret PowerNormalPhysical70100%20
HM03SurfWaterSpecial90100%15
HM04StrengthNormalPhysical80100%15
HM05WaterfallWaterPhysical80100%15
HM06Rock SmashFightingPhysical40100%15
HM07DiveWaterPhysical80100%10

Move tutor

MoveTypeCat.PowerAcc.PP
SnoreNormalSpecial50100%15
Icy WindIceSpecial5595%15
Pain SplitNormalStatus——20
BlockNormalStatus——5
Water PulseWaterSpecial60100%20
Earth PowerGroundSpecial90100%10
X / Y13 level-up · 36 TM/HM

Level-up

LvMoveTypeCat.PowerAcc.PP
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
1Mud SportGroundStatus——15
1Water PulseWaterSpecial60100%20
2Mud SportGroundStatus——15
4HardenNormalStatus——30
7Water PulseWaterSpecial60100%20
11Mud BombGroundSpecial6585%10
16Hidden PowerNormalSpecial60100%15
22Rain DanceWaterStatus——5
29Body SlamNormalPhysical85100%15
41Muddy WaterWaterSpecial9085%10
54RecoverNormalStatus——5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus—90%10
TM07HailIceStatus——10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus——20
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM28DigGroundPhysical80100%10
TM32Double TeamNormalStatus——15
TM34Sludge WavePoisonSpecial95100%10
TM36Sludge BombPoisonSpecial90100%10
TM37SandstormRockStatus——10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM48RoundNormalSpecial60100%15
TM55ScaldWaterSpecial80100%15
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus—100%20
TM71Stone EdgeRockPhysical10080%5
TM78BulldozeGroundPhysical60100%20
TM80Rock SlideRockPhysical7590%10
TM83InfestationBugSpecial20100%20
TM87SwaggerNormalStatus—85%15
TM88Sleep TalkNormalStatus——10
TM90SubstituteNormalStatus——10
TM94Rock SmashFightingPhysical40100%15
HM03SurfWaterSpecial90100%15
HM04StrengthNormalPhysical80100%15
HM05WaterfallWaterPhysical80100%15
Black 2 / White 213 level-up · 34 TM/HM · 6 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
1Mud SportGroundStatus——15
1Water PulseWaterSpecial60100%20
2Mud SportGroundStatus——15
4HardenNormalStatus——30
7Water PulseWaterSpecial60100%20
11Mud BombGroundSpecial6585%10
16Hidden PowerNormalSpecial60100%15
22Rain DanceWaterStatus——5
29Body SlamNormalPhysical85100%15
41Muddy WaterWaterSpecial9085%10
54RecoverNormalStatus——5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus—90%10
TM07HailIceStatus——10
TM10Hidden PowerNormalSpecial60100%15
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM28DigGroundPhysical80100%10
TM32Double TeamNormalStatus——15
TM34Sludge WavePoisonSpecial95100%10
TM36Sludge BombPoisonSpecial90100%10
TM37SandstormRockStatus——10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM48RoundNormalSpecial60100%15
TM55ScaldWaterSpecial80100%15
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus—100%20
TM71Stone EdgeRockPhysical10080%5
TM78BulldozeGroundPhysical60100%20
TM80Rock SlideRockPhysical7590%10
TM87SwaggerNormalStatus—85%15
TM90SubstituteNormalStatus——10
TM94Rock SmashFightingPhysical40100%15
HM03SurfWaterSpecial90100%15
HM04StrengthNormalPhysical80100%15
HM05WaterfallWaterPhysical80100%15
HM06DiveWaterPhysical80100%10

Move tutor

MoveTypeCat.PowerAcc.PP
SnoreNormalSpecial50100%15
Icy WindIceSpecial5595%15
Sleep TalkNormalStatus——10
Pain SplitNormalStatus——20
BlockNormalStatus——5
Earth PowerGroundSpecial90100%10
Black / White13 level-up · 34 TM/HM

Level-up

LvMoveTypeCat.PowerAcc.PP
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
1Mud SportGroundStatus——15
1Water PulseWaterSpecial60100%20
2Mud SportGroundStatus——15
4HardenNormalStatus——30
7Water PulseWaterSpecial60100%20
11Mud BombGroundSpecial6585%10
16Hidden PowerNormalSpecial60100%15
22Rain DanceWaterStatus——5
29Body SlamNormalPhysical85100%15
41Muddy WaterWaterSpecial9085%10
54RecoverNormalStatus——5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus—90%10
TM07HailIceStatus——10
TM10Hidden PowerNormalSpecial60100%15
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM28DigGroundPhysical80100%10
TM32Double TeamNormalStatus——15
TM34Sludge WavePoisonSpecial95100%10
TM36Sludge BombPoisonSpecial90100%10
TM37SandstormRockStatus——10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM48RoundNormalSpecial60100%15
TM55ScaldWaterSpecial80100%15
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus—100%20
TM71Stone EdgeRockPhysical10080%5
TM78BulldozeGroundPhysical60100%20
TM80Rock SlideRockPhysical7590%10
TM87SwaggerNormalStatus—85%15
TM90SubstituteNormalStatus——10
TM94Rock SmashFightingPhysical40100%15
HM03SurfWaterSpecial90100%15
HM04StrengthNormalPhysical80100%15
HM05WaterfallWaterPhysical80100%15
HM06DiveWaterPhysical80100%10
HeartGold / SoulSilver13 level-up · 37 TM/HM · 10 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
1Mud SportGroundStatus——15
1Water PulseWaterSpecial60100%20
2Mud SportGroundStatus——15
4HardenNormalStatus——30
7Water PulseWaterSpecial60100%20
11Mud BombGroundSpecial6585%10
16Hidden PowerNormalSpecial60100%15
22Rain DanceWaterStatus——5
29Body SlamNormalPhysical85100%15
41Muddy WaterWaterSpecial9085%10
54RecoverNormalStatus——5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM03Water PulseWaterSpecial60100%20
TM06ToxicPoisonStatus—90%10
TM07HailIceStatus——10
TM10Hidden PowerNormalSpecial60100%15
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM28DigGroundPhysical80100%10
TM32Double TeamNormalStatus——15
TM36Sludge BombPoisonSpecial90100%10
TM37SandstormRockStatus——10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM43Secret PowerNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM55BrineWaterSpecial65100%10
TM58EndureNormalStatus——10
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus—100%20
TM71Stone EdgeRockPhysical10080%5
TM78CaptivateNormalStatus—100%20
TM80Rock SlideRockPhysical7590%10
TM82Sleep TalkNormalStatus——10
TM83Natural GiftNormalPhysical—100%15
TM87SwaggerNormalStatus—85%15
TM90SubstituteNormalStatus——10
HM03SurfWaterSpecial90100%15
HM04StrengthNormalPhysical80100%15
HM05WhirlpoolWaterSpecial3585%15
HM06Rock SmashFightingPhysical40100%15
HM07WaterfallWaterPhysical80100%15

Move tutor

MoveTypeCat.PowerAcc.PP
HeadbuttNormalPhysical70100%15
String ShotBugStatus—95%40
SnoreNormalSpecial50100%15
Mud-SlapGroundSpecial20100%10
Icy WindIceSpecial5595%15
Pain SplitNormalStatus——20
Ancient PowerRockSpecial60100%5
DiveWaterPhysical80100%10
BlockNormalStatus——5
Earth PowerGroundSpecial90100%10
Platinum13 level-up · 36 TM/HM · 6 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
1Mud SportGroundStatus——15
1Water PulseWaterSpecial60100%20
2Mud SportGroundStatus——15
4HardenNormalStatus——30
7Water PulseWaterSpecial60100%20
11Mud BombGroundSpecial6585%10
16Hidden PowerNormalSpecial60100%15
22Rain DanceWaterStatus——5
29Body SlamNormalPhysical85100%15
41Muddy WaterWaterSpecial9085%10
54RecoverNormalStatus——5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM03Water PulseWaterSpecial60100%20
TM06ToxicPoisonStatus—90%10
TM07HailIceStatus——10
TM10Hidden PowerNormalSpecial60100%15
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM28DigGroundPhysical80100%10
TM32Double TeamNormalStatus——15
TM36Sludge BombPoisonSpecial90100%10
TM37SandstormRockStatus——10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM43Secret PowerNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM55BrineWaterSpecial65100%10
TM58EndureNormalStatus——10
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus—100%20
TM71Stone EdgeRockPhysical10080%5
TM78CaptivateNormalStatus—100%20
TM80Rock SlideRockPhysical7590%10
TM82Sleep TalkNormalStatus——10
TM83Natural GiftNormalPhysical—100%15
TM87SwaggerNormalStatus—85%15
TM90SubstituteNormalStatus——10
HM03SurfWaterSpecial90100%15
HM04StrengthNormalPhysical80100%15
HM06Rock SmashFightingPhysical40100%15
HM07WaterfallWaterPhysical80100%15

Move tutor

MoveTypeCat.PowerAcc.PP
SnoreNormalSpecial50100%15
Mud-SlapGroundSpecial20100%10
Icy WindIceSpecial5595%15
Ancient PowerRockSpecial60100%5
DiveWaterPhysical80100%10
Earth PowerGroundSpecial90100%10
Diamond / Pearl13 level-up · 36 TM/HM

Level-up

LvMoveTypeCat.PowerAcc.PP
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
1Mud SportGroundStatus——15
1Water PulseWaterSpecial60100%20
2Mud SportGroundStatus——15
4HardenNormalStatus——30
7Water PulseWaterSpecial60100%20
11Mud BombGroundSpecial6585%10
16Hidden PowerNormalSpecial60100%15
22Rain DanceWaterStatus——5
29Body SlamNormalPhysical85100%15
41Muddy WaterWaterSpecial9085%10
54RecoverNormalStatus——5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM03Water PulseWaterSpecial60100%20
TM06ToxicPoisonStatus—90%10
TM07HailIceStatus——10
TM10Hidden PowerNormalSpecial60100%15
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM28DigGroundPhysical80100%10
TM32Double TeamNormalStatus——15
TM36Sludge BombPoisonSpecial90100%10
TM37SandstormRockStatus——10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM43Secret PowerNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM55BrineWaterSpecial65100%10
TM58EndureNormalStatus——10
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus—100%20
TM71Stone EdgeRockPhysical10080%5
TM78CaptivateNormalStatus—100%20
TM80Rock SlideRockPhysical7590%10
TM82Sleep TalkNormalStatus——10
TM83Natural GiftNormalPhysical—100%15
TM87SwaggerNormalStatus—85%15
TM90SubstituteNormalStatus——10
HM03SurfWaterSpecial90100%15
HM04StrengthNormalPhysical80100%15
HM06Rock SmashFightingPhysical40100%15
HM07WaterfallWaterPhysical80100%15

Where to find it in the official games

Every area in the 16 official games on this site that has it, from each game's own encounter tables.

In the wild

GameAreaMethodLevelsRate
Diamond / PearlFuego IronworksGrass
Poké Radar, swarm, swarm, Poké Radar
29-3015%
Diamond / PearlRoute 218Grass
Poké Radar, swarm, swarm, Poké Radar
28-3020%
Diamond / PearlRoute 221Grass
Poké Radar, swarm, swarm, Poké Radar
28-3030%
Diamond / PearlRoute 222Grass
morning, morning, Poké Radar, night, night, Poké Radar, swarm, morning, swarm, morning, Poké Radar, swarm, night, swarm, night, Poké Radar
40-4240%
Diamond / PearlRoute 224Grass
morning, Emerald in the GBA slot, morning, FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot, morning, Poké Radar, Emerald in the GBA slot, morning, Poké Radar, FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot, night, Emerald in the GBA slot, night, FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot, night, Poké Radar, Emerald in the GBA slot, night, Poké Radar, FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot, swarm, night, Emerald in the GBA slot, swarm, night, FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot, swarm, night, Poké Radar, Emerald in the GBA slot, swarm, night, Poké Radar, FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot
52-5330%
Diamond / PearlSea Route 230 rareGrass
Poké Radar, swarm, swarm, Poké Radar
515%
PlatinumCanalave City rareSurf20-401%
PlatinumFuego IronworksGrass
morning, morning, Poké Radar, night, night, Poké Radar
29-3125%
PlatinumFuego Ironworks rareSurf20-401%
PlatinumPastoria City rareSurf20-401%
PlatinumRoute 205Surf20-409%
PlatinumRoute 212Surf20-409%
PlatinumRoute 213 rareSurf20-401%
PlatinumRoute 218Grass
morning, night, swarm, morning, swarm, night
28-3035%
PlatinumRoute 218 rareSurf20-401%
PlatinumRoute 224Grass
morning, Emerald in the GBA slot, morning, FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot, night, Emerald in the GBA slot, night, FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot, swarm, morning, Emerald in the GBA slot, swarm, morning, FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot, swarm, night, Emerald in the GBA slot, swarm, night, FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot
4910%
PlatinumRoute 224Surf35-5510%
PlatinumValley WindworksSurf20-409%
X / YFriend SafariGrass3033.3%
Sun / MoonAncient Poni PathGrass40-437.7%
Sun / MoonExeggutor IslandGrass40-4310%
Sun / MoonPoni WildsGrass40-437.7%
Sun / MoonPoni WildsSurf40-4320%
Ultra Sun / Ultra MoonAncient Poni PathGrass41-4410%
Ultra Sun / Ultra MoonAncient Poni PathSurf41-4420%
Ultra Sun / Ultra MoonExeggutor IslandGrass42-4510%
Ultra Sun / Ultra MoonPoni Breaker CoastSurf41-4420%
Ultra Sun / Ultra MoonPoni WildsGrass41-4410%

Where to find it in the ROM hacks

30 guides on this site put it somewhere you can catch it. Areas link to that guide's own route page, with its own rates and levels.

GuideWhere
Unbound
Route 14 BDay · Lv 37-40 · 10%
Route 14 BNight · Lv 37-40 · 10%
Route 14 CDay · Lv 37-40 · 10%
and 1 more area
Unbound
East
Cootes BogSurf · Lv 49-50 · 5%rare
Crystal Peak 1F Left RoomSurf · Lv 60-65 · 90%
Crystal Peak 1F Main RoomSurf · Lv 49-53 · 90%
and 4 more areas
Emerald Rogue
Mountain 0 — HoennGround-theme rooms · Lv —
Mountain 2 — HoennGround-theme rooms · Lv —
Waterfront 0 — HoennWater-theme rooms · Lv —
and 8 more areas
Pokémon Soulgold
Route 30Super Rod · Lv 20 · 4%rare
Violet CitySurf · Lv 30-40 · 1%rare
Pokémon Soulgold
Gastrodon East
Abandoned LabSurf · Lv 30-35 · 9%
Abandoned LabSuper Rod · Lv 40-45 · 15%
South Johto Sea (Route33south 2)Surf · Lv 30-35 · 10%
and 7 more areas
Sword and Shield Ultimate Plus
Route 9Grass · Lv 40-47 · 10%
Isle Of Armor 5Grass · Lv 40-50 · 20%
Blaze Black 2 Redux & Volt White 2 Redux
Relic Passage - Center (Main) RoomSurf · Lv 25-35 · 10%
Giants Chasm - Entrance CaveSurf Ripple · Lv 50-60 · 30%
Giants Chasm - Entrance CaveSuper Rod Ripple · Lv 50-60 · 5%rare
and 10 more areas
Recordkeepers
Your starting team — Sand affinityStarter pool (two drawn) · Lv 100
Elite Redux
Route 103Surfing · Lv — · 30%
Route 110Surfing · Lv — · 30%
Altering CaveSurfing · Lv — · 30%
and 1 more area
Elite Redux
East
Route 119Surfing · Lv — · 60%
Pokémon GS Chronicles
Route 44Wild · Lv —
Inclement Emerald
Altering CaveSurf · Lv Scales · 30%
Route 103Surf · Lv Scales · 30%
Route 110Surf · Lv Scales · 30%
and 1 more area
Renegade Platinum
Valley WindworksSurf · Lv 20-40 · 5%rare
Route 205 ~ SouthSurf · Lv 20-40 · 5%rare
Route 213Morning · Lv 32-34 · 25%
and 13 more areas
Pokémon Crippling Medical Debt Edition
East
Littleroot TownSuper Rod · Lv 35-42 · 4%rare
Underwater Route 118Surf · Lv 60-64 · 1%rare
Pokémon Crippling Medical Debt Edition
West
Littleroot TownSuper Rod · Lv 35-42 · 40%
Underwater Route 118Surf · Lv 60-64 · 30%
Blinding White Plus
Route 18Dark Grass · Lv 50-52 · 10%
Gaia
Ferre Ruins (1F)Ground · Lv — · 10%
Pokémon Hearth
Hot SpringsSurf · Lv 25-35 · 5%rare
Hot SpringsSuper Rod · Lv 30-40 · 40%
Pokémon Emerald Imperium
Route 102Super Rod · Lv 20-25 · 40%
Route 124Super Rod · Lv 25-35 · 80%
Route 133Super Rod · Lv 35-45 · 19%
Pokémon Platinum Kaizo
Route 218Grass · Lv 30 · 4%
Route 218Surf · Lv ? · 1%
Route 205 SouthSurf · Lv ? · 4%
and 2 more areas
Pokémon Exceeded
East Sea
Pacifidlog CaveSuper Rod · Lv 40-45 · 1%rare
Victory RoadGrass · Lv 36-42 · 10%
Victory RoadGrass · Lv 36-42 · 10%
and 3 more areas
Pokémon Emerald Squared
Route 104Water · Lv 25-33 · 11.1%
Route 131Water · Lv 40-50 · 11.1%
Seafloor Cavern Room 1Land · Lv 40-50 · 5%
and 12 more areas
Pokémon Emerald Squared
East
Route 104Water · Lv 25-30 · 11.1%
Lilycove CityLand · Lv 40-45 · 5%
Sacred Gold & Storm Silver
Dark Cave (Violet Side)Surf · Lv — · 10%
Union Cave (1F)Surf · Lv — · 5%rare
Union Cave (B1F)Surf · Lv — · 5%rare
and 4 more areas
Blaze Black 2 & Volt White 2
Relic Passage - Center RoomSurf Ripple · Lv 25-35 · 10%
Giant Chasm - Front CaveSurf Ripple · Lv 48-52 · 30%
Giant Chasm - Back CaveSurf Ripple · Lv 50-58 · 30%
and 8 more areas
Pokémon SoothingSilver
Mt. Silver (1F)Surf · Lv 30-40 · 5%rare
Mt. Silver (Moltres room)Surf · Lv 30-40 · 5%rare
Mt. Silver (3F)Surf · Lv 30-40 · 5%rare
and 2 more areas
Pokémon Definitive Platinum
Route 210Super Rod · Lv 40-55 · 20%
Route 213Grass · Lv 31 · 20%
Route 212 (1)Surf · Lv 30-40 · 10%
and 1 more area
Rising Ruby & Sinking Sapphire
Safari Zone (3)Surfing · Lv 40 - 45
Blaze Black & Volt White
Wellspring Cave — 1FSurf Ripple · Lv — · 40%
Wellspring Cave — B1FSurf · Lv — · 40%
Wellspring Cave — B1FSurf Ripple · Lv — · 40%
and 2 more areas
Pokémon Omega Ruby Origins
Meteor Falls Section 3Grass · Lv 30-35
Meteor Falls Section 4Grass · Lv 32-35
Poke47
East
Gauntlet Island NortheastOverworld (Flood) · Lv 35 · 20%
Gauntlet Island NortheastSurf (Flood) · Lv 30-35 · 10%
Gauntlet Island NorthwestOverworld (Finale) · Lv 32 · 20%
and 3 more areas
Pokémon Saiph 2
West
Ancient Pueltown (Area 2)Grass · Lv 30-36 · 10%
Vientown (Nabiki Beach)Grass · Lv 46-52 · 20%
Marine CaveWalking · Lv 47-52 · 20%
Pokémon Emerald Rule-ette
Abandoned ShipSurf · Lv 20-25 · 15%
Lilycove CityGrass · Lv 28-30 · 30%
Pokémon Mirror Gold
Blackthorn CitySurf · Lv 42-45 · 4%rare
Route 24Good Rod · Lv 55-60 · 30%
Route 24Rod (swarm) · Lv ?
and 4 more areas
Pokémon Timeless Diamond & Spaceless Pearl
Pastoria CitySurfing · Lv 30-38 · 1%
Canalave CitySurfing · Lv 30-38 · 1%
Route 205 (Southern segment)Surfing · Lv 30-38 · 9%
and 20 more areas
Pokémon Heart & Soulnot in the wild in this guide's tables — evolve, trade or battle it
Infinite Fusionnot in the wild in this guide's tables — evolve, trade or battle it
Pokémon R.O.W.Enot in the wild in this guide's tables — evolve, trade or battle it
Radical Rednot in the wild in this guide's tables — evolve, trade or battle it
Pokémon Odyssey II: Heroes of Lemurianot in the wild in this guide's tables — evolve, trade or battle it
Pokémon Too Many Types 1not in the wild in this guide's tables — evolve, trade or battle it
Pokémon: Wishes of Tomorrownot in the wild in this guide's tables — evolve, trade or battle it
HeartGold Generationsnot in the wild in this guide's tables — evolve, trade or battle it
Pokémon CC: Operation Masqueradenot in the wild in this guide's tables — evolve, trade or battle it
Pokémon Black Pearl Emeraldnot in the wild in this guide's tables — evolve, trade or battle it
Pokémon Overcomplicatednot in the wild in this guide's tables — evolve, trade or battle it

Compare official Gastrodon with the ROM hacks →

In the 37 guides that include it

Changed in 12 of 37 guides: retyped in 2, stats in 3, abilities in 10.

Every ROM hack on this site that has Gastrodon, and what it did to it. Guides that changed something are first. Click one for that version's full page — locations, moveset and TMs.

GuideTypeTotalAbilities
Sword and Shield Ultimate PlusChangedWaterGround475Sticky Hold, Storm Drain
− Sand Force
RecordkeepersChangedWaterGround475Storm Drain
− Sticky Hold, Sand Force
Renegade PlatinumChangedWaterGround475Sticky Hold, Storm Drain
− Sand Force
Pokémon Odyssey II: Heroes of LemuriaChangedWaterGround→ElectricGround510 +35
+9 HP, -8 Attack, +12 Defense, +8 Sp. Atk, +18 Sp. Def, -4 Speed
Gooey, Galvanize
+ Gooey, Galvanize − Sticky Hold, Storm Drain, Sand Force
Pokémon Crippling Medical Debt EditionChanged0 -475
-111 HP, -83 Attack, -68 Defense, -92 Sp. Atk, -82 Sp. Def, -39 Speed
—
Pokémon Too Many Types 1ChangedWaterGround→OUGround475—
Pokémon Platinum KaizoChangedWaterGround475Dry Skin
+ Dry Skin − Sticky Hold, Storm Drain, Sand Force
Sacred Gold & Storm SilverChangedWaterGround475Sticky Hold, Storm Drain
− Sand Force
Pokémon SoothingSilverChangedWaterGround475Sticky Hold, Storm Drain
− Sand Force
Pokémon Omega Ruby OriginsChangedWaterGround475Sticky Hold, Water Absorb
+ Water Absorb − Storm Drain, Sand Force
Pokémon Mirror GoldChangedWaterGround530 +55
+6 HP, +9 Attack, +27 Defense, +13 Sp. Def
Sticky Hold, Storm Drain
− Sand Force
Pokémon Timeless Diamond & Spaceless PearlChangedWaterGround475Sticky Hold, Storm Drain
− Sand Force
UnboundUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Emerald RogueUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Pokémon SoulgoldUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Pokémon Heart & SoulUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Pokémon R.O.W.EUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Blaze Black 2 Redux & Volt White 2 ReduxUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Radical RedUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Elite ReduxUnchangedWaterGround475Sand Guard, Storm Drain, Regenerator
Pokémon GS ChroniclesUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Inclement EmeraldUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
GaiaUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Pokémon HearthUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Pokémon Emerald ImperiumUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Pokémon: Wishes of TomorrowUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Pokémon ExceededUnchangedWaterGround475Storm Drain, Sand Force
Pokémon Emerald SquaredUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Blaze Black 2 & Volt White 2UnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Pokémon Definitive PlatinumUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Rising Ruby & Sinking SapphireUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Blaze Black & Volt WhiteUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
HeartGold GenerationsUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Pokémon CC: Operation MasqueradeUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Pokémon Black Pearl EmeraldUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force
Pokémon OvercomplicatedUnchangedWaterGround475Shouleily Payload, Electric Surge, Galvanize
Pokémon Emerald Rule-etteUnchangedWaterGround475Sticky Hold, Storm Drain, Sand Force

Pokédex entries

What each game says about it, in the games' own words.

DiamondIt has a pliable body without any bones. If any part of its body is torn off, it grows right back.
Pearl / Y / Alpha SapphireIt apparently had a huge shell for protection in ancient times. It lives in shallow tidal pools.
Platinum / Black / White / Black 2 / White 2Long ago, its entire back was shielded with a sturdy shell. There are traces of it left in its cells.
HeartGold / SoulSilver / X / Omega RubyWhen its natural enemy attacks, it oozes purple fluid and escapes.
SunIt has strong regenerative capabilities. Even if parts of it are bitten off by fish Pokémon, it will return to normal within a few hours.
MoonPlankton, 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 SunLong ago, it had a shell on its back. There’s now a vestigial plate on its back that’s hard but thin.
Ultra MoonTheir shape and color change, depending on their environment and diet. There are many of them at beaches where the waves are calm.

Names in other languages

Japaneseトリトドン
Japanese (Rōmaji)Tritodon
GermanGastrodon
FrenchTritosor
SpanishGastrodon
ItalianGastrodon
Korean트리토돈
Chinese (Simplified)海兔兽
Chinese (Traditional)海兔獸

Official data here is present-day reference data from PokéAPI, not a snapshot of any one game's era — the Fairy type and hidden abilities arrived partway through the series, so a difference against an older game can belong to the series rather than to that ROM hack.