Don't pass on Shellder in Crystal. Water Stone leads to S-Tier Cloyster, which gains Spikes in Gen 2 for entry hazard dominance.
305HP30Attack65Defense100Speed40Sp.Def25Sp.Atk45
Shellder
Cloyster
Weak to
Special
Balanced
40Speed · Very Slow

Is Shellder Good in Crystal Playthrough?

Fishing in Johto's coastal areas. Cloyster needs a Water Stone and hits hard physically with Ice-type attacks. Crystal's move tutor doesn't add much since Cloyster already learns what it needs. The Water Stone is the main gate.

StrongGoodEvenToughBadSGEEEGGEETGGESGGEGGGGFalknerGym 1BugsyGym 2WhitneyGym 3MortyGym 4ShellderCatchableCloysterEvolveChuckGym 5JasmineGym 6PryceGym 7ClairGym 8SurgeGym 9SabrinaGym 10ErikaGym 11JanineGym 12MistyGym 13BrockGym 14BlaineGym 15BlueGym 16WillE4KogaE4BrunoE4KarenE4LanceChamp*
Falkner
Gym 1
Strong

Shellder resists most of Falkner's coverage and hits back hard.

Easy KO
Pidgey
Lv 7
NormalFlying
Keen Eye
TackleMud Slap
You Win
Pidgeotto
Lv 9
NormalFlying
Keen Eye
TackleMud SlapGust
Bugsy
Gym 2
Good

Shellder has the type edge here and should clean up Bugsy's team.

You Win
Metapod
Lv 14
Bug
Shed Skin
TackleString ShotHarden
You Win
Kakuna
Lv 14
BugPoison
Shed Skin
Poison StingString ShotHarden
Even
Scyther
Lv 16
BugFlying
Swarm
Quick AttackLeerFury Cutter
Whitney
Gym 3
Even

Shellder trades roughly evenly with Whitney's team.

Even
Clefairy
Lv 18
Normal
Cute Charm
Double SlapMimicEncoreMetronome
Risky
Miltank
Lv 20
Normal
Thick Fat
RolloutAttractStompMilk Drink
Morty
Gym 4
Even

Shellder trades roughly evenly with Morty's team.

You Win
Gastly
Lv 21
GhostPoison
Levitate
LickSpiteMean LookCurse
Even
Haunter
Lv 21
GhostPoison
Levitate
HypnosisMimicCurseNight Shade
Risky
Gengar
Lv 25
GhostPoison
Cursed Body
HypnosisShadow BallMean LookDream Eater
Even
Haunter
Lv 23
GhostPoison
Levitate
SpiteMean LookMimicNight Shade
Chuck
Gym 5
Even

Cloyster trades roughly evenly with Chuck's team.

Even
Primeape
Lv 27
Fighting
Vital Spirit
LeerRageKarate ChopFury Swipes
Risky
Poliwrath
Lv 30
WaterFighting
Water Absorb
HypnosisMind ReaderSurfDynamic Punch
Jasmine
Gym 6
Good

Cloyster has the type edge here and should clean up Jasmine's team.

Even
Magnemite
Lv 30
ElectricSteel
Magnet Pull
ThunderboltSupersonicSonic BoomThunder Wave
Even
Magnemite
Lv 30
ElectricSteel
Magnet Pull
ThunderboltSupersonicSonic BoomThunder Wave
Easy KO
Steelix
Lv 35
SteelGround
Rock Head
ScreechSunny DayRock ThrowIron Tail
Pryce
Gym 7
Good

Cloyster has the type edge here and should clean up Pryce's team.

Even
Seel
Lv 27
Water
Thick Fat
HeadbuttIcy WindAurora BeamRest
Even
Dewgong
Lv 29
WaterIce
Thick Fat
HeadbuttIcy WindAurora BeamRest
Easy KO
Piloswine
Lv 31
IceGround
Oblivious
Icy WindFury AttackMistBlizzard
Clair
Gym 8
Even

Cloyster trades roughly evenly with Clair's team.

You Win
Dragonair
Lv 37
Dragon
Shed Skin
Thunder WaveSurfSlamDragon Breath
Even
Dragonair
Lv 37
Dragon
Shed Skin
Thunder WaveThunderboltSlamDragon Breath
You Win
Dragonair
Lv 37
Dragon
Shed Skin
Thunder WaveIce BeamSlamDragon Breath
Risky
Kingdra
Lv 40
WaterDragon
Swift Swim
SmokescreenSurfHyper BeamDragon Breath
Lt. Surge
Gym 9
Even

Cloyster trades roughly evenly with Lt. Surge's team.

Risky
Raichu
Lv 44
Electric
Static
Thunder WaveQuick AttackThunderboltThunder
Even
Electrode
Lv 40
Electric
Soundproof
ScreechDouble TeamSwiftExplosion
Even
Magneton
Lv 40
ElectricSteel
Magnet Pull
Lock OnDouble TeamSwiftZap Cannon
Even
Electrode
Lv 40
Electric
Soundproof
ScreechDouble TeamSwiftExplosion
Risky
Electabuzz
Lv 46
Electric
Static
Quick AttackThunder PunchLight ScreenThunder
Sabrina
Gym 10
Tough

Sabrina's typing presses Cloyster's defenses.

Risky
Espeon
Lv 46
Psychic
Synchronize
Sand AttackQuick AttackSwiftPsychic
Even
Mr Mime
Lv 46
Psychic
Soundproof
BarrierReflectBaton PassPsychic
Risky
Alakazam
Lv 48
Psychic
Synchronize
RecoverFuture SightPsychicReflect
Erika
Gym 11
Good

Cloyster has the type edge here and should clean up Erika's team.

You Win
Tangela
Lv 42
Grass
Chlorophyll
Vine WhipBindGiga DrainSleep Powder
You Win
Jumpluff
Lv 41
GrassFlying
Chlorophyll
Mega DrainLeech SeedCotton SporeGiga Drain
You Win
Victreebel
Lv 46
GrassPoison
Chlorophyll
Sunny DaySynthesisAcidRazor Leaf
Even
Bellossom
Lv 46
Grass
Chlorophyll
Sunny DaySynthesisPetal DanceSolar Beam
Janine
Gym 12
Good

Cloyster has the type edge here and should clean up Janine's team.

Easy KO
Crobat
Lv 36
PoisonFlying
Inner Focus
ScreechSupersonicConfuse RayWing Attack
You Win
Weezing
Lv 36
Poison
Levitate
SmogSludge BombToxicExplosion
You Win
Weezing
Lv 36
Poison
Levitate
SmogSludge BombToxicExplosion
You Win
Ariados
Lv 33
BugPoison
Swarm
Scary FaceGiga DrainString ShotNight Shade
Even
Venomoth
Lv 39
BugPoison
Shield Dust
ForesightDouble TeamGustPsychic
Misty
Gym 13
Even

Cloyster trades roughly evenly with Misty's team.

Risky
Golduck
Lv 42
Water
Damp
SurfDisablePsych UpPsychic
You Win
Quagsire
Lv 42
WaterGround
Damp
SurfAmnesiaEarthquakeRain Dance
Even
Lapras
Lv 44
WaterIce
Water Absorb
SurfPerish SongBlizzardRain Dance
Risky
Starmie
Lv 47
WaterPsychic
Illuminate
SurfConfuse RayRecoverIce Beam
Brock
Gym 14
Strong

Cloyster resists most of Brock's coverage and hits back hard.

Easy KO
Graveler
Lv 41
RockGround
Rock Head
Defense CurlRock SlideRolloutEarthquake
Easy KO
Rhyhorn
Lv 41
GroundRock
Lightning Rod
Fury AttackScary FaceEarthquakeHorn Drill
Even
Omastar
Lv 42
RockWater
Swift Swim
BiteSurfProtectSpike Cannon
Easy KO
Onix
Lv 44
RockGround
Rock Head
BindRock SlideBideSandstorm
Even
Kabutops
Lv 42
RockWater
Swift Swim
SlashSurfEndureGiga Drain
Blaine
Gym 15
Good

Cloyster has the type edge here and should clean up Blaine's team.

Easy KO
Magcargo
Lv 45
FireRock
Magma Armor
CurseSmogFlamethrowerRock Slide
Even
Magmar
Lv 45
Fire
Flame Body
Thunder PunchFire PunchSunny DayConfuse Ray
Even
Rapidash
Lv 50
Fire
Run Away
Quick AttackFire SpinFury AttackFire Blast
Blue
Gym 16
Good

Cloyster has the type edge here and should clean up Blue's team.

You Win
Pidgeot
Lv 56
NormalFlying
Keen Eye
Quick AttackWhirlwindWing AttackMirror Move
Risky
Alakazam
Lv 54
Psychic
Synchronize
DisableRecoverPsychicReflect
Easy KO
Rhydon
Lv 56
GroundRock
Lightning Rod
Fury AttackSandstormRock SlideEarthquake
Risky
Gyarados
Lv 58
WaterFlying
Intimidate
TwisterHydro PumpRain DanceHyper Beam
Even
Exeggutor
Lv 58
GrassPsychic
Chlorophyll
Sunny DayLeech SeedEgg BombSolar Beam
Even
Arcanine
Lv 58
Fire
Intimidate
RoarSwiftFlamethrowerExtreme Speed
Will
Elite Four
Even

Cloyster trades roughly evenly with Will's team.

You Win
Xatu
Lv 40
PsychicFlying
Synchronize
Quick AttackFuture SightConfuse RayPsychic
Risky
Jynx
Lv 41
IcePsychic
Oblivious
Double SlapLovely KissIce PunchPsychic
You Win
Exeggutor
Lv 41
GrassPsychic
Chlorophyll
ReflectLeech SeedEgg BombPsychic
Risky
Slowbro
Lv 41
WaterPsychic
Oblivious
CurseAmnesiaBody SlamPsychic
You Win
Xatu
Lv 42
PsychicFlying
Synchronize
Quick AttackFuture SightConfuse RayPsychic
Koga
Elite Four
Good

Cloyster has the type edge here and should clean up Koga's team.

You Win
Ariados
Lv 40
BugPoison
Swarm
Double TeamSpider WebBaton PassGiga Drain
Even
Venomoth
Lv 41
BugPoison
Shield Dust
SupersonicGustPsychicToxic
You Win
Forretress
Lv 43
BugSteel
Sturdy
ProtectSwiftExplosionSpikes
You Win
Muk
Lv 42
Poison
Stench
MinimizeAcid ArmorSludge BombToxic
Easy KO
Crobat
Lv 44
PoisonFlying
Inner Focus
Double TeamQuick AttackWing AttackToxic
Bruno
Elite Four
Good

Cloyster has the type edge here and should clean up Bruno's team.

You Win
Hitmontop
Lv 42
Fighting
Intimidate
PursuitQuick AttackDigDetect
Even
Hitmonlee
Lv 42
Fighting
Limber
SwaggerDouble KickHigh Jump KickForesight
Even
Hitmonchan
Lv 42
Fighting
Keen Eye
Thunder PunchIce PunchFire PunchMach Punch
Easy KO
Onix
Lv 43
RockGround
Rock Head
BindEarthquakeSandstormRock Slide
You Win
Machamp
Lv 46
Fighting
Guts
Rock SlideForesightVital ThrowCross Chop
Karen
Elite Four
Good

Cloyster has the type edge here and should clean up Karen's team.

You Win
Umbreon
Lv 42
Dark
Synchronize
Sand AttackConfuse RayFeint AttackMean Look
You Win
Vileplume
Lv 42
GrassPoison
Chlorophyll
Stun SporeAcidMoonlightPetal Dance
You Win
Gengar
Lv 45
GhostPoison
Cursed Body
LickSpiteCurseDestiny Bond
Easy KO
Murkrow
Lv 44
DarkFlying
Insomnia
Quick AttackWhirlwindPursuitFeint Attack
Even
Houndoom
Lv 47
DarkFire
Early Bird
RoarPursuitFlamethrowerCrunch
Lance
Champion
Good

Cloyster has the type edge here and should clean up Lance's team.

Even
Gyarados
Lv 44
WaterFlying
Intimidate
FlailRain DanceSurfHyper Beam
You Win
Dragonite
Lv 47
DragonFlying
Inner Focus
Thunder WaveTwisterThunderHyper Beam
You Win
Dragonite
Lv 47
DragonFlying
Inner Focus
Thunder WaveTwisterBlizzardHyper Beam
Easy KO
Aerodactyl
Lv 46
RockFlying
Rock Head
Wing AttackAncient PowerRock SlideHyper Beam
You Win
Charizard
Lv 46
FireFlying
Blaze
FlamethrowerWing AttackSlashHyper Beam
You Win
Dragonite
Lv 50
DragonFlying
Inner Focus
Fire BlastSafeguardOutrageHyper Beam

Catchable

Available after Badge 4
Type
Water
Tier
F

Catch Shellder in New Bark Town (Good Rod fishing, Lv 20, uncommon).

View Shellder locations

Evolve Shellder to Cloyster

Use Water Stone
Type
WaterIce
Tier
S

Shellder evolves into Cloyster with a Water Stone. You can receive the Water Stone from an NPC in Route 42.

Recommended Moves

How to Get Shellder in Crystal

Shellder is a Good Rod and Super Rod catch, 22 encounters across ten coastal towns and routes. You need a rod for every one of them, since it never surfaces by surfing or in grass.

Wild Shellder may be holding when caught:

Pearl (23% chance) A beautiful pearl. Sell low.
Big Pearl (2% chance) A big, beautiful pearl. Sell high.

10 locations to catch Shellder

Encountered via fishing with a Rod

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

How to Get Shiny Shellder in Crystal

Shellder is fishing-only in Crystal: cast the Good or Super Rod at New Bark Town, Olivine, Route 41 or Cinnabar Island, with Super Rod pulls at level 40. Compare Shiny Shellder odds across every game

Normal vs Shiny
Normal Shellder in CrystalNormal
Shiny Shellder in Crystal Shiny
Color ShiftPurpletoRed
Shiny TierA Tier Shiny

Shiny Shellder Evolution

2 Forms
Showing shiny artworkView Full Evolution Chart

Crystal Shiny Shellder Calculator

2 Methods
Fastest Path

The best route is Breed w/ Shiny Parent, about 1 in 64 on each try.

Step 1 · Encounter Method2 in Crystal

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

Breed w/ Shiny Parent: Eggs inherit stats from a shiny parent, so about 1 in 64 hatch shiny. A shiny Ditto helps every egg, and any other shiny parent (the red Gyarados works) helps only eggs of the opposite gender.

How many you have done, or plan to do.

120,000
Shiny Odds Per Try1 / 64Breed w/ Shiny Parent
Chance By Now50.8%at 45 eggs hatchedAbout 5 in 10 hunters have one by now
What To Expect
ChanceEncountersTime
10%lucky few7----
25%one in four19----
50%coin flip45----
90%very likely147----
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

Planning a longer hunt? Set up Shellder in the Crystal Shiny Odds Calculator to compare every method side by side.

Shellder Weakness

Type-wise, Shellder takes extra damage from Electric and Grass. It resists 4 types, giving it decent defensive coverage. Shellder's physical bulk (base 100 Def) helps cushion physical weakness hits, but special attackers are the bigger threat.

Shellder Weakness and Resistance Chart
DamageTypes
2x (Weak)Electric, Grass
0.5x (Resist)Fire, Water, Ice, Steel
Gen II Type Chart
  • Dark and Steel types added — Fairy does not exist yet
  • Moves are Physical or Special based on type, not per move
  • Special stat split into Sp.Atk and Sp.Def

What is Shellder Weak Against

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

What is Shellder Strong Against

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

Best Pokemon Against Shellder

Magneton
Magneton
ElectricSteel
C
Raikou
Raikou
Electric
S
Jolteon
Jolteon
Electric
A
Electabuzz
Electabuzz
Electric
C
Vileplume
Vileplume
GrassPoison
C

Shellder Evolutions

Evolving Shellder into Cloyster takes an evolution item. It's not a simple level-up, so check the chain details below. Evolving adds up to 220 stat points total. View every chain in the Evolution Chart.

How to Evolve

2 Forms
Stat Comparison 2 Stages
Shellder
Water
Cloyster
WaterIce
HP
30
50+20
ATK
65
95+30
DEF
100
180+80
SP.ATK
45
85+40
SP.DEF
25
45+20
SPE
40
70+30
BST
305F-Tier
525S-Tier+220
ROLE
Balanced
Balanced
TYPE
Physical
Mixed

Breeding

Very Easy

Breed Shellder easily with 13 breeding partners from the Water 3 egg group. Pass egg moves like Barrier, Bubble Beam, Rapid Spin and 2 more to offspring.

Egg Groups
Water 3
Gender
♂50.0%♀50.0%
Hatch Time
20 cycles·5,140 steps
Quick~5 min with Flame Body
Egg Moves
5moves
Breed With (best first)
corsolaomastarkabutopsomanytekabutotentacruelcloysterstarmiekinglerstaryutentacoolkrabby

C Shellder Best Moveset

Pre-evolution of Cloyster, whose MoveSpikes and MoveExplosion define a top-tier competitive role. 65 Defense at this stage can't support any function. The value is entirely in the evolution.

Best Build

Experimental
Utility
Ability
Unknown
Item
MiracleBerryRECOVERY
Best Nature for Shellder
HardyNEUTRAL

Utility Moveset

  • SurfSTAB
  • Icy Wind
  • ExplosionCoverage
  • ClampSTAB

Moves List

The egg pool carries weight here. Barrier and Bubble Beam aren't available any other way for Shellder, and they meaningfully change what it threatens. Stack those on top of Surf and Bubble Beam for solid options.

Level-Up Moves

Lv 1
Tackle
D3510035Normal
Lv 1
Withdraw
———40Water
Lv 9
Supersonic
——5520Normal
Lv 17
Aurora Beam
—6510020Ice
Lv 25
Protect+4
C——10Normal
Lv 33
Leer
——10030Normal
Lv 41
Clamp
S528510Water
Lv 49
Ice Beam
D9510010Ice

TM Moves

15 of 19 TMs are obtainable before the Elite Four

TM
TM45D—10015Normal
TM14D120705Ice
TM32———15Normal
TM20
Endure+4Burned Towerbadge 4
D——10Normal
TM10D6010015Normal
TM16
Icy WindPrize for defeating Prycenot until badge 7
S559515Ice
TM17C——10Normal
TM18C——5Water
TM44
RestIce Pathnot until badge 7
C——10Psychic
TM13
SnoreMoomoo Farmbadge 3
—4010015Normal
HM03
SurfEcruteak Citybadge 3
S14210015Water
TM34
SwaggerOlivine Lighthousebadge 4
C—8515Normal
TM39
SwiftUnion Cavebadge 1
D60—20Normal
TM06C—8510Poison
HM06D528515Water

Egg Moves

Egg
Egg
Barrier
D——30Psychic
Egg
Bubble Beam
D9710020Water
Egg
Rapid Spin
D5010040Normal
Egg
Screech
D—8540Normal
Egg
Take Down
D908520Normal

Tutor Moves

Tut
Tutor
Ice Beam
D9510010Ice

Base Stats

Base Stats
Avg
HP30
F
Attack65
C
Defense100
B
Sp. Atk45
D
Sp. Def25
F
Speed40
D
Total305
Details
Catch Rate
Easy190 / 255
Growth Rate
Slow1.25M XP
Height0.3 m
Weight4.0 kg
Base XP61
EV Yield
HPAtkDef+1SpASpDSpe
Defense training source
Pokedex Entry

Clamping on to an opponent reveals its vulnerable parts, so it uses this move only as a last resort.

Pokemon Crystal

Shellder Crystal Guide

  • Yes. Wild Shellder in Crystal can hold Pearl (23%) or Big Pearl (2%). Use Thief (TM46) or Covet to swipe the held item without affecting your catch chance. Quickest way to farm rare items like Pearl.

  • In Crystal, Shellder does the job early-game if you need a Water type on your team. Evolve it into Cloyster before the later gyms and it holds up fine through the story.

Game Availability

Shellder has been part of the series since Red & Blue, appearing in 20 titles across all 9 generations. As a Gen 1 original, it's one of the most consistently available Pokemon in the franchise.

Explore

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