The Sea Slug Pokemon. Shellos has East and West Sea forms in Diamond & Pearl. Sticky Hold prevents item theft, and Storm Drain redirects Water moves toward C-Tier Gastrodon.
Ability 1Sticky HoldAbility 1Prevents a held item from being removed by other Pokémon.Ability 2Storm DrainAbility 2Redirects single-target water moves to this Pokémon where possible. Absorbs Water moves, raising Special Attack one stage.
325HP76Attack48Defense48Speed34Sp.Def62Sp.Atk57
Shellos
Gastrodon
Weak to
Special
Balanced
34Speed · Very Slow

Is Shellos Good in Diamond & Pearl Playthrough?

Route 205 Water-type. Two forms (East Sea, West Sea) that are cosmetic only. Gastrodon at 30 adds Ground. AbilityStorm Drain draws Water moves in doubles battles. One Grass weakness on the evolution. Available early.

StrongGoodEvenToughBadSTETEGEGEGGEGSGERoarkGym 1ShellosCatchableGardeniaGym 2MayleneGym 3Crasher WakeGym 4GastrodonEvolveFantinaGym 5ByronGym 6CandiceGym 7VolknerGym 8AaronE4BerthaE4FlintE4LucianE4MarsBossJupiterBossSaturnBossCynthiaChamp*
Roark
Gym 1
Strong

Shellos resists most of Roark's coverage and hits back hard.

Easy KO
Geodude
Lv 12
RockGround
Rock Head
Stealth RockRock Throw
Easy KO
Onix
Lv 12
RockGround
Rock Head
Stealth RockRock ThrowScreech
You Win
Cranidos
Lv 14
Rock
Mold Breaker
HeadbuttPursuitLeer
Gardenia
Gym 2
Tough

Gardenia's team hits Shellos's weaknesses hard.

Even
Cherubi
Lv 19
Grass
Chlorophyll
Grass KnotLeech SeedGrowthSafeguard
Risky
Turtwig
Lv 19
Grass
Overgrow
Grass KnotRazor LeafWithdrawReflect
Avoid
Roserade
Lv 22
GrassPoison
Natural Cure
Grass KnotMagical LeafPoison StingStun Spore
Maylene
Gym 3
Even

Shellos trades roughly evenly with Maylene's team.

Even
Meditite
Lv 27
FightingPsychic
Pure Power
Drain PunchConfusionMeditateDetect
Even
Machoke
Lv 27
Fighting
Guts
Brick BreakRock TombLeerForesight
Even
Lucario
Lv 30
FightingSteel
Steadfast
Drain PunchForce PalmMetal ClawBone Rush
Crasher Wake
Gym 4
Tough

Crasher Wake's typing presses Shellos's defenses.

Avoid
Gyarados
Lv 27
WaterFlying
Intimidate
BrineDragon RageBiteSwagger
Even
Quagsire
Lv 27
WaterGround
Damp
Mud BombSlamMud SportTail Whip
Risky
Floatzel
Lv 30
Water
Swift Swim
BrineIce FangPursuitSwift
Fantina
Gym 5
Even

Gastrodon trades roughly evenly with Fantina's team.

You Win
Drifblim
Lv 32
GhostFlying
Aftermath
Ominous WindGustAstonishMinimize
Even
Gengar
Lv 34
GhostPoison
LevitateImmune to Ground attacks
Shadow ClawPoison JabSpiteConfuse Ray
Risky
Mismagius
Lv 36
Ghost
LevitateImmune to Ground attacks
Shadow BallPsybeamMagical LeafConfuse Ray
Byron
Gym 6
Good

Gastrodon has the type edge here and should clean up Byron's team.

Even
Bronzor
Lv 36
SteelPsychic
LevitateImmune to Ground attacks
Flash CannonExtrasensoryConfuse RayHypnosis
You Win
Steelix
Lv 36
SteelGround
Rock Head
Gyro BallIce FangDragon BreathSandstorm
Easy KO
Bastiodon
Lv 39
RockSteel
Sturdy
Flash CannonAncient PowerIron DefenseRest
Candice
Gym 7
Even

Gastrodon trades roughly evenly with Candice's team.

Even
Snover
Lv 38
GrassIce
Snow Warning
AvalancheRazor LeafIngrainLeer
Easy KO
Sneasel
Lv 38
DarkIce
Inner Focus
AvalancheSlashFeint AttackTaunt
Even
Medicham
Lv 40
FightingPsychic
Pure Power
Ice PunchForce PalmDetectBulk Up
Risky
Abomasnow
Lv 42
GrassIce
Snow Warning
AvalancheWood HammerGrass WhistleSwagger
Volkner
Gym 8
Good

Gastrodon has the type edge here and should clean up Volkner's team.

You Win
Raichu
Lv 46
Electric
Static
Charge BeamBrick BreakThunder WaveLight Screen
You Win
Ambipom
Lv 47
Normal
Technician
Shock WaveAgilityNasty PlotBaton Pass
Even
Octillery
Lv 47
Water
Suction Cups
Charge BeamOctazookaAurora BeamBullet Seed
You Win
Luxray
Lv 49
Electric
Rivalry
Charge BeamThunder FangCrunchThunder Wave
Aaron
Elite Four
Even

Gastrodon trades roughly evenly with Aaron's team.

You Win
Dustox
Lv 53
BugPoison
Shield Dust
ToxicBug BuzzDouble TeamLight Screen
You Win
Beautifly
Lv 53
BugFlying
Swarm
Energy BallBug BuzzPsychicShadow Ball
You Win
Vespiquen
Lv 54
BugFlying
Pressure
Attack OrderDefend OrderHeal OrderPower Gem
Risky
Heracross
Lv 54
BugFighting
Swarm
MegahornClose CombatNight SlashStone Edge
You Win
Drapion
Lv 57
PoisonDark
Battle Armor
X ScissorCross PoisonIce FangAerial Ace
Bertha
Elite Four
Good

Gastrodon has the type edge here and should clean up Bertha's team.

Even
Quagsire
Lv 55
WaterGround
Damp
DigDouble TeamProtectSandstorm
You Win
Sudowoodo
Lv 56
Rock
Sturdy
EarthquakeSucker PunchHammer ArmSandstorm
Easy KO
Golem
Lv 56
RockGround
Rock Head
EarthquakeGyro BallBrick BreakSandstorm
Even
Whiscash
Lv 55
WaterGround
Oblivious
FissureAqua TailZen HeadbuttRock Slide
You Win
Hippowdon
Lv 59
Ground
Sand Stream
EarthquakeStone EdgeCrunchCurse
Flint
Elite Four
Good

Gastrodon has the type edge here and should clean up Flint's team.

You Win
Rapidash
Lv 58
Fire
Run Away
Flare BlitzSolar BeamBounceSunny Day
Easy KO
Steelix
Lv 57
SteelGround
Rock Head
Fire FangRock TombScreechSunny Day
Even
Drifblim
Lv 58
GhostFlying
Aftermath
Will O WispOminous WindDouble TeamBaton Pass
You Win
Lopunny
Lv 57
Normal
Cute Charm
Fire PunchCharmMirror CoatSunny Day
You Win
Infernape
Lv 61
FireFighting
Blaze
Flare BlitzThunder PunchMach PunchEarthquake
Lucian
Elite Four
Even

Gastrodon trades roughly evenly with Lucian's team.

Even
Mr Mime
Lv 59
Psychic
Soundproof
PsychicThunderboltReflectLight Screen
Even
Girafarig
Lv 59
NormalPsychic
Inner Focus
PsychicShadow BallDouble HitCrunch
Even
Medicham
Lv 60
FightingPsychic
Pure Power
Drain PunchFire PunchThunder PunchIce Punch
Even
Alakazam
Lv 60
Psychic
Synchronize
PsychicEnergy BallFocus BlastRecover
Risky
Bronzong
Lv 63
SteelPsychic
LevitateImmune to Ground attacks
PsychicGyro BallEarthquakeCalm Mind
Mars
Commander
Good

Gastrodon has the type edge here and should clean up Mars's team.

You Win
Golbat
Lv 37
PoisonFlying
Inner Focus
Air CutterBiteToxicSupersonic
You Win
Bronzor
Lv 37
SteelPsychic
LevitateImmune to Ground attacks
Gyro BallExtrasensoryIron DefenseConfuse Ray
You Win
Purugly
Lv 39
Normal
Thick Fat
SlashFeint AttackHypnosisFake Out
Jupiter
Commander
Strong

Gastrodon resists most of Jupiter's coverage and hits back hard.

You Win
Zubat
Lv 18
PoisonFlying
Inner Focus
Giga DrainWing AttackBite
Easy KO
Skuntank
Lv 20
PoisonDark
Stench
Night SlashPoison GasScreechSmokescreen
Saturn
Commander
Good

Gastrodon has the type edge here and should clean up Saturn's team.

You Win
Kadabra
Lv 38
Psychic
Synchronize
PsychicShock WaveRecoverEmbargo
You Win
Bronzor
Lv 38
SteelPsychic
LevitateImmune to Ground attacks
Gyro BallExtrasensoryShadow BallConfuse Ray
You Win
Toxicroak
Lv 40
PoisonFighting
Anticipation
Poison JabBrick BreakX ScissorSwagger
Cynthia
Champion
Even

Gastrodon trades roughly evenly with Cynthia's team.

Even
Spiritomb
Lv 61
GhostDark
Pressure
Dark PulsePsychicSilver WindEmbargo
Risky
Roserade
Lv 60
GrassPoison
Natural Cure
Energy BallSludge BombShadow BallExtrasensory
You Win
Gastrodon
Lv 60
WaterGround
Sticky Hold
Muddy WaterEarthquakeStone EdgeSludge Bomb
You Win
Lucario
Lv 63
FightingSteel
Steadfast
Aura SphereDragon PulsePsychicEarthquake
Even
Milotic
Lv 63
Water
Marvel Scale
SurfIce BeamMirror CoatAqua Ring
You Win
Garchomp
Lv 66
DragonGround
Sand Veil
Dragon RushEarthquakeBrick BreakGiga Impact

Catchable

Available after Badge 1
Type
Water
Tier
E

Catch Shellos on Route 205 (walking, Lv 8-10, common).

View Shellos locations

Evolve Shellos to Gastrodon

Level 30
Type
WaterGround
Tier
C

Shellos evolves into Gastrodon at Level 30. Your Shellos should hit Level 30 before you reach Fantina, at typical leveling pace.

View Gastrodon locations

Recommended Moves

  • After Gardenia
    • TM28GroundDigPower 120Accuracy 100%PP 10Maniac Tunnel
    • TM68NormalGiga ImpactPower 150Accuracy 90%PP 5Veilstone Game Corner
    • TM15NormalHyper BeamPower 150Accuracy 90%PP 5Veilstone Department Store
  • After Crasher Wake
  • After Byron
    • LV 41WaterMuddy WaterPower 143Accuracy 85%PP 10
  • After Volkner
  • Post-Game
    • TM42NormalFacadePower 70Accuracy 100%PP 20Survival Area

How to Get Shellos in Diamond & Pearl

Shellos oozes across seven coastal spots, common to rare from level 7 up. The sea slug comes in two colors split by where you are on the map, the West and East seas painting it differently.

7 locations to catch Shellos

Encountered via tall grass encounters

Badge 1
Badge 2
Badge 3
Badge 4
Badge 5
Badge 6
Badge 7
Badge 8
Post-Game

How to Get Shiny Shellos in Diamond & Pearl

Shellos slinks across Route 205, Route 213, and Route 218, where a PokeRadar chain is what drops its shiny within reach. Compare Shiny Shellos odds across every game

Normal vs Shiny
Normal Shellos in Diamond & PearlNormal
Shiny Shellos in Diamond & Pearl Shiny
Color ShiftPurpletoPink
Shiny TierB Tier Shiny

Shiny Shellos Evolution

2 Forms
Showing shiny artworkView Full Evolution Chart

Diamond & Pearl Shiny Shellos Calculator

3 Methods
Fastest Path

The best route is PokeRadar Chain at full boosts, about 1 in 200 on each try. Tune it below.

Step 1 · Encounter Method3 in Diamond & Pearl

PokeRadar Chain: Chain shaking-grass patches without breaking the combo. The rate peaks at a chain of 40.

Masuda Method: Breed with a parent from a different-language game. Works on any breedable line.

Full Odds: Walk through grass, surf, or fish. Every encounter is its own independent shiny roll.

Step 2 · Boost Your Oddstap to add
00

How many you have done, or plan to do.

120,000
Shiny Odds Per Try1 / 200PokeRadar Chain
Chance By Now50.2%at 139 encountersAbout 5 in 10 hunters have one by now
What To Expect
ChanceEncountersTime
10%lucky few22----
25%one in four58----
50%coin flip139----
90%very likely460----
How is this calculated?

Every encounter has the same shiny chance, the Shiny Odds Per Try shown above. Each one is a separate roll that does not care how many you have already done, so the more you hunt, the higher your overall chance of at least one shiny. The formula below turns your odds and your number of tries into that combined chance.

chance after N tries = 1 − (1 − p)^N,  where  p = 1 / odds per try

Example at 1 in 8,192 (classic full odds): about 864 encounters for a 10 percent chance, 5,678 for 50 percent, and 18,862 for 90 percent.

The table above flips that around: it shows how many encounters it takes to reach a 10, 25, 50, and 90 percent chance at your current odds. Turning on boosts like the Shiny Charm, sandwiches, or chains improves your odds, so the encounter numbers drop.

These are estimates, not promises. Most games have no pity counter, meaning no guaranteed shiny no matter how many you hunt, so even Very Likely is not guaranteed: some hunters find one early, others go well past that point.

Where these shiny odds come from: Read our full methodology

Curious how fast a hunt could go? Work out your Diamond & Pearl shiny odds for Shellos.

Shellos Weakness

Type-wise, Shellos takes extra damage from Electric and Grass. The Water typing picks up 4 resistances to work with. Storm Drain grants an additional Water immunity, reshaping the matchup chart.

Shellos Weakness and Resistance Chart
DamageTypes
2x (Weak)Electric, Grass
0.5x (Resist)Fire, Water, Ice, Steel
Gen IV Type Chart
  • Fairy type does not exist — Dragon has fewer checks
  • Physical / Special split now per-move (introduced Gen IV)

What is Shellos Weak Against

Good
2Weak
4Resist
1Immune
Score0
4xCritical
None
¼xResist
None
0xImmune

What is Shellos Strong Against

3Strong
3Resisted
0Immune
Score0
½xResisted
0xImmune
None

Best Pokemon Against Shellos

Rotom
Rotom
ElectricGhost
C
Shiftry
Shiftry
GrassDark
C
Elekid
Elekid
Electric
B
Electrike
Electrike
Electric
C
Grotle
Grotle
Grass
C

Shellos Evolutions

Shellos is the base form in a two-stage line leading to Gastrodon. Check the evolution method below. A decent partner pool for breeding via two egg groups. Eggs take an average time to hatch. Evolving adds up to 150 stat points total. View every chain in the Evolution Chart.

How to Evolve

2 Forms
Stat Comparison 2 Stages
Shellos
Water
Gastrodon
WaterGround
HP
76
111+35
ATK
48
83+35
DEF
48
68+20
SP.ATK
57
92+35
SP.DEF
62
82+20
SPE
34
39+5
BST
325E-Tier
475C-Tier+150
ROLE
Balanced
Trick Room
TYPE
Utility
Mixed

Breeding

Very Easy

Breed Shellos easily with 31 breeding partners from the Amorphous and Water 1 egg groups. Pass egg moves like Amnesia, Counter, Curse and 7 more to offspring.

Egg Groups
AmorphousWater 1
Gender
♂50.0%♀50.0%
Hatch Time
20 cycles·5,140 steps
Quick~5 min with Flame Body
Egg Moves
10moves
Breed With (best first)
azumarillgardevoirgalladeblastoisegolduckferaligatrkingdraswampertslowbroslowkingoctilleryludicolo

DP Shellos Best Moveset

Water typing with AbilityStorm Drain redirecting Water moves to Shellos, though it doesn't boost Sp. Atk this generation. The moveset has basic Water attacks. Evolve to Gastrodon.

Best Build

Experimental
Special Revenge Killer
Ability
Storm Drain
Item
Choice ScarfSPEED
Best Nature for Shellos
Timid+SPE

Shellos best EVs are Speed and Sp. Atk

EVs

Special Revenge Killer Moveset

  • SurfSTAB
  • Earth Power
  • Ice Beam
  • Hidden Power Grass

Moves List

Breeding's the move. Amnesia and Counter give Shellos options it can't learn any other way, and Ground and Normal coverage and more already covers a decent range on top of Muddy Water and Surf. The egg moves push it further.

Level-Up Moves

Lv 1
Mud-Slap
D2010010Ground
Lv 2
Mud Sport
———15Ground
Lv 4
Harden
D——30Normal
Lv 7
Water Pulse
D9010020Water
Lv 11
Mud Bomb
—658510Ground
Lv 16
Hidden Power
D6010015Normal
Lv 22
Rain Dance
C——5Water
Lv 29
Body Slam
D8510015Normal
Lv 37
Muddy Water
C1428510Water
Lv 46
Recover
C——10Normal

TM Moves

22 of 23 TMs are obtainable before the Elite Four

TM
TM45
AttractAmity Squarebadge 2
——10015Normal
TM14
BlizzardLake Acuitybadge 2
D120705Ice
TM55D9710010Water
TM78
CaptivateRoute 204badge 2
——10020Normal
TM32
Double TeamWayward Cavebadge 2
———15Normal
TM58
Endure+4Veilstone Game Cornerbadge 2
C——10Normal
TM42
FacadeSurvival Area
D7010020Normal
TM21
FrustrationVeilstone Game Cornerbadge 2
D—10020Normal
TM10
Hidden PowerVeilstone Game Corner
D6010015Normal
TM13
Ice BeamRoute 216badge 2
B9510010Ice
TM83
Natural GiftVeilstone Department Storebadge 2
D—10015Normal
TM17
Protect+4Veilstone Department Storebadge 2
C——10Normal
TM44
RestVeilstone Game Cornerbadge 2
C——10Psychic
TM27
ReturnVeilstone Game Cornerbadge 2
D—10020Normal
TM43
Secret PowerAmity Squarebadge 2
—7010020Normal
TM82
Sleep TalkEterna Forestbadge 2
C——10Normal
TM90
SubstituteVeilstone Game Cornerbadge 2
C——10Normal
HM03
SurfCelestic Townbadge 4
B14210015Water
TM87
SwaggerTM in Mr Backlot office in the Pokémon Mansion on Route 212badge 2
——9015Normal
TM06
ToxicRoute 212badge 2
C—8510Poison
TM03
Water PulseRavaged Pathbadge 5
D9010020Water

Egg Moves

Egg
Egg
Amnesia
D——20Psychic
Egg
Counter-5
D—10020Fighting
Egg
Curse
C——10Ghost
Egg
Fissure
——305Ground
Egg
Memento
D—10010Dark
Egg
Mirror Coat-5
D—10020Psychic
Egg
Spit Up
——10010Normal
Egg
Stockpile
D——20Normal
Egg
Swallow
———10Normal
Egg
Yawn
D——10Normal

Tutor Moves

Shellos can't learn any Tutor moves

Base Stats

Base Stats
Avg
HP76
C
Attack48
D
Defense48
D
Sp. Atk57
D
Sp. Def62
C
Speed34
F
Total325
Details
Catch Rate
Easy190 / 255
Growth Rate
Medium Fast1M XP
Height0.3 m
Weight6.3 kg
Base XP65
Abilities
Sticky Hold
Prevents a held item from being removed by other Pokémon.
Storm Drain
Redirects single-target water moves to this Pokémon where possible. Absorbs Water moves, raising Special Attack one stage.
Storm Drain grants Water immunity
EV Yield
HP+1AtkDefSpASpDSpe
HP training source
Pokedex Entry

Its colors and shapes differ from region to region. In the Sinnoh region, two types are confirmed.

It lives along bodies of water. Its body shape has changed to suit its habitat.

Shellos Diamond & Pearl Guide

  • In Diamond & Pearl, for a casual playthrough, Shellos works as a placeholder. Water coverage is useful early. The real payoff is Gastrodon. That's where the stats start mattering.

Game Availability

Debuting in Diamond & Pearl, Shellos appears in 13 games across 6 generations. A reliable presence in a solid number of games, typically found through catching or hatching as a base form.

Explore

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