Shellos has East and West Sea forms in Platinum. 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 Platinum Playthrough?

Routes 205 and 213 depending on east or west Sinnoh. Water-type with AbilitySticky Hold. Gastrodon at level 30 becomes Water/Ground. One of the more reliable mid-game Water catches with excellent evolution typing.

StrongGoodEvenToughBadSBTGEGGGEGGESGGERoarkGym 1ShellosCatchableGardeniaGym 2FantinaGym 3GastrodonEvolveMayleneGym 4Crasher WakeGym 5ByronGym 6CandiceGym 7VolknerGym 8AaronE4BerthaE4FlintE4LucianE4JupiterBossMarsBossSaturnBossCynthiaChamp*
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
Bad

Gardenia's Pokemon outpace and outclass Shellos here.

Risky
Turtwig
Lv 20
Grass
Overgrow
Grass KnotRazor LeafSunny DayReflect
Avoid
Cherrim
Lv 20
Grass
Flower Gift
Grass KnotLeech SeedMagical LeafSafeguard
Avoid
Roserade
Lv 22
GrassPoison
Natural Cure
Grass KnotMagical LeafPoison StingStun Spore
Fantina
Gym 3
Tough

Fantina's team hits Shellos's weaknesses hard.

Even
Duskull
Lv 24
Ghost
LevitateImmune to Ground attacks
Will O WispPursuitShadow SneakFuture Sight
Even
Haunter
Lv 24
GhostPoison
LevitateImmune to Ground attacks
Shadow ClawSucker PunchHypnosisConfuse Ray
Risky
Mismagius
Lv 26
Ghost
LevitateImmune to Ground attacks
Shadow BallPsybeamMagical LeafConfuse Ray
Maylene
Gym 4
Good

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

Even
Meditite
Lv 28
FightingPsychic
Pure Power
Drain PunchConfusionRock TombFake Out
Even
Machoke
Lv 29
Fighting
Guts
Karate ChopRock TombStrengthFocus Energy
You Win
Lucario
Lv 32
FightingSteel
Steadfast
Drain PunchForce PalmMetal ClawBone Rush
Crasher Wake
Gym 5
Even

Gastrodon trades roughly evenly with Crasher Wake's team.

Risky
Gyarados
Lv 33
WaterFlying
Intimidate
WaterfallBrineBiteTwister
Even
Quagsire
Lv 34
WaterGround
Damp
Mud ShotRock TombWater PulseYawn
Risky
Floatzel
Lv 37
Water
Swift Swim
BrineIce FangCrunchAqua Jet
Byron
Gym 6
Good

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

Easy KO
Magneton
Lv 37
ElectricSteel
Magnet Pull
Flash CannonThunderboltTri AttackMetal Sound
You Win
Steelix
Lv 38
SteelGround
Rock Head
Flash CannonIce FangEarthquakeSandstorm
Easy KO
Bastiodon
Lv 41
RockSteel
Sturdy
Metal BurstStone EdgeIron DefenseTaunt
Candice
Gym 7
Good

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

Easy KO
Sneasel
Lv 40
DarkIce
Inner Focus
SlashAerial AceFeint AttackIce Shard
You Win
Piloswine
Lv 40
IceGround
Oblivious
AvalancheStone EdgeEarthquakeHail
Risky
Abomasnow
Lv 42
GrassIce
Snow Warning
AvalancheWood HammerWater PulseFocus Blast
Even
Froslass
Lv 44
IceGhost
Snow Cloak
BlizzardDouble TeamShadow BallPsychic
Volkner
Gym 8
Good

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

Easy KO
Jolteon
Lv 46
Electric
Volt Absorb
Thunder WaveCharge BeamIron TailQuick Attack
Easy KO
Raichu
Lv 46
Electric
Static
Charge BeamFocus BlastSignal BeamQuick Attack
You Win
Luxray
Lv 48
Electric
Rivalry
Ice FangThunder FangCrunchFire Fang
Even
Electivire
Lv 50
Electric
Motor Drive
Thunder PunchFire PunchQuick AttackGiga Impact
Aaron
Elite Four
Even

Gastrodon trades roughly evenly with Aaron's team.

You Win
Yanmega
Lv 49
BugFlying
Speed Boost
Air SlashBug BuzzU TurnDouble Team
Even
Scizor
Lv 49
BugSteel
Swarm
Iron HeadX ScissorNight SlashQuick Attack
You Win
Vespiquen
Lv 50
BugFlying
Pressure
Attack OrderDefend OrderHeal OrderPower Gem
Risky
Heracross
Lv 51
BugFighting
Swarm
MegahornClose CombatNight SlashStone Edge
You Win
Drapion
Lv 53
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
Whiscash
Lv 50
WaterGround
Oblivious
Earth PowerAqua TailZen HeadbuttSandstorm
You Win
Gliscor
Lv 53
GroundFlying
Hyper Cutter
EarthquakeIce FangFire FangThunder Fang
You Win
Hippowdon
Lv 52
Ground
Sand Stream
EarthquakeStone EdgeCrunchYawn
Easy KO
Golem
Lv 52
RockGround
Rock Head
EarthquakeFire PunchThunder PunchSandstorm
Easy KO
Rhyperior
Lv 55
GroundRock
Lightning Rod
EarthquakeRock WreckerMegahornAvalanche
Flint
Elite Four
Good

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

Easy KO
Houndoom
Lv 52
DarkFire
Early Bird
FlamethrowerSludge BombDark PulseSunny Day
You Win
Flareon
Lv 55
Fire
Flash Fire
OverheatGiga ImpactQuick AttackWill O Wisp
You Win
Rapidash
Lv 53
Fire
Run Away
Flare BlitzSolar BeamBounceSunny Day
You Win
Infernape
Lv 55
FireFighting
Blaze
Flare BlitzThunder PunchMach PunchEarthquake
Even
Magmortar
Lv 57
Fire
Flame Body
FlamethrowerThunderboltSolar BeamHyper Beam
Lucian
Elite Four
Even

Gastrodon trades roughly evenly with Lucian's team.

Even
Mr Mime
Lv 53
Psychic
Soundproof
PsychicThunderboltReflectLight Screen
Even
Espeon
Lv 55
Psychic
Synchronize
PsychicShadow BallQuick AttackSignal Beam
Even
Bronzong
Lv 54
SteelPsychic
LevitateImmune to Ground attacks
PsychicGyro BallEarthquakeCalm Mind
Even
Alakazam
Lv 56
Psychic
Synchronize
PsychicEnergy BallFocus BlastRecover
Risky
Gallade
Lv 59
PsychicFighting
Steadfast
Drain PunchPsycho CutLeaf BladeStone Edge
Jupiter
Commander
Strong

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

You Win
Zubat
Lv 21
PoisonFlying
Inner Focus
Giga DrainWing AttackBite
Easy KO
Skuntank
Lv 23
PoisonDark
Stench
Night SlashPoison GasScreechSmokescreen
Mars
Commander
Good

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

You Win
Golbat
Lv 38
PoisonFlying
Inner Focus
Air CutterBiteToxicSupersonic
You Win
Bronzor
Lv 38
SteelPsychic
LevitateImmune to Ground attacks
Gyro BallExtrasensoryIron DefenseConfuse Ray
You Win
Purugly
Lv 40
Normal
Thick Fat
SlashFeint AttackHypnosisFake Out
Saturn
Commander
Good

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

Even
Golbat
Lv 42
PoisonFlying
Inner Focus
Air CutterBitePoison FangConfuse Ray
You Win
Bronzor
Lv 42
SteelPsychic
LevitateImmune to Ground attacks
Gyro BallExtrasensoryShadow BallConfuse Ray
You Win
Toxicroak
Lv 44
PoisonFighting
Anticipation
Poison JabBrick BreakX ScissorFeint Attack
Cynthia
Champion
Even

Gastrodon trades roughly evenly with Cynthia's team.

Even
Spiritomb
Lv 58
GhostDark
Pressure
Dark PulsePsychicSilver WindShadow Ball
Risky
Roserade
Lv 58
GrassPoison
Natural Cure
Energy BallSludge BombToxicExtrasensory
Even
Togekiss
Lv 60
NormalFlying
Hustle
Air SlashAura SphereWater PulseShock Wave
You Win
Lucario
Lv 60
FightingSteel
Steadfast
Aura SphereExtreme SpeedShadow BallStone Edge
Even
Milotic
Lv 58
Water
Marvel Scale
SurfIce BeamMirror CoatDragon Pulse
You Win
Garchomp
Lv 62
DragonGround
Sand Veil
Dragon RushEarthquakeFlamethrowerGiga Impact

Catchable

Available after Badge 1
Type
Water
Tier
E

Catch Shellos in Valley Windworks (walking, Lv 9-12, 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 Maylene, at typical leveling pace.

View Gastrodon locations

Recommended Moves

How to Get Shellos in Platinum

Shellos is common both in waterside grass and out surfing across the central routes and coastal towns. Whether you walk the shore or paddle the water, the sea slug is an easy and widespread mid-game catch.

8 locations to catch Shellos

Encountered via Surfing, tall grass encounters

Badge 2
Badge 3
Badge 4
Badge 5
Surf
Badge 6

Where To Catch Shellos in Pt

Shellos is where the line starts, caught through surfing and walking encounters at Lv. 9-30. The chain covers 2 catchable stages before reaching the final form.

Want the exact numbers? Work out your catch odds in Platinum for Shellos.

How to Get Shiny Shellos in Platinum

Shellos oozes across the grass on Route 205 and Route 212, common enough to chain to 40 for a shiny. Compare Shiny Shellos odds across every game

Normal vs Shiny
Normal Shellos in PlatinumNormal
Shiny Shellos in Platinum Shiny
Color ShiftPurpletoPink
Shiny TierB Tier Shiny

Shiny Shellos Evolution

2 Forms
Showing shiny artworkView Full Evolution Chart

Platinum 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 Platinum

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 Platinum 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

Cherrim
Cherrim
Grass
C
Shiftry
Shiftry
GrassDark
C
Rotom
Rotom
ElectricGhost
C
Roselia
Roselia
GrassPoison
B
Leafeon
Leafeon
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

Pt Shellos Best Moveset

Water typing with AbilityStorm Drain redirecting Water moves to Shellos in doubles. The moveset has basic Water attacks at 57 Sp. Atk but needs Gastrodon's stats. Gastrodon takes over with real stats.

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 3
D120705Ice
TM55D9710010Water
TM78
CaptivateRoute 204badge 2
——10020Normal
TM32
Double TeamWayward Cavebadge 2
———15Normal
TM58
Endure+4Veilstone Game Cornerbadge 3
C——10Normal
TM42
FacadeSurvival Area
D7010020Normal
TM21
FrustrationVeilstone Game Cornerbadge 3
D—10020Normal
TM10
Hidden PowerVeilstone Game Cornerbadge 3
D6010015Normal
TM13
Ice BeamRoute 216badge 3
B9510010Ice
TM83
Natural GiftVeilstone Department Storebadge 3
D—10015Normal
TM17C——10Normal
TM44C——10Psychic
TM27D—10020Normal
TM43
Secret PowerAmity Squarebadge 2
—7010020Normal
TM82
Sleep TalkEterna Forestbadge 2
C——10Normal
TM90
SubstituteVeilstone Game Cornerbadge 2
C——10Normal
HM03B14210015Water
TM87
SwaggerPokémon Mansionbadge 4
——9015Normal
TM06
ToxicRoute 212badge 4
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

Tut
Tutor
Ancient Power
D601005Rock
Tutor
Dive
D12010010Water
Tutor
Earth Power
B9010010Ground
Tutor
Icy Wind
D559515Ice
Tutor
Mud-Slap
D2010010Ground
Tutor
Snore
D4010015Normal

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

Beware of pushing strongly on its squishy body, as it makes a mysterious purple fluid ooze out.

Pokemon Platinum

Shellos Platinum Guide

  • In Platinum, 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

Was this page helpful?
Thanks for your feedback!
Want to tell us more?
What was most useful?
What could be improved?
Thanks for your feedback