Is Cloyster Good in Red & Blue Playthrough?
Cloyster's physical Defense is absurd and the Ice typing gives it the coverage to threaten Lance and other late-game threats. It handles physical attackers easily but folds to anything special. A specialist that dominates its lane and gets destroyed outside of it.
Shellder resists most of Brock's coverage and hits back hard.
Misty's typing presses Shellder's defenses.
Shellder trades roughly evenly with Lt. Surge's team.
Erika's team hits Shellder's weaknesses hard.
Shellder trades roughly evenly with Koga's team.
Sabrina's typing presses Shellder's defenses.
Cloyster resists most of Blaine's coverage and hits back hard.
Cloyster resists most of Giovanni's coverage and hits back hard.
Cloyster trades roughly evenly with Lorelei's team.
Cloyster resists most of Bruno's coverage and hits back hard.
Cloyster trades roughly evenly with Agatha's team.
Cloyster has the type edge here and should clean up Lance's team.
Cloyster has the type edge here and should clean up Blue's team.
Catch Shellder
Catch Shellder on Seafoam Islands (walking, Lv 28, rare).
Recommended Moves
- After Misty
- TM11WaterBubble BeamPower 98Accuracy 100%PP 20Prize for defeating Cerulean Gym Leader Misty
- After Lt. Surge
- TM10NormalDouble-EdgePower 100Accuracy 100%PP 15Rocket Hideout
- TM49NormalTri AttackPower 80Accuracy 100%PP 10Celadon Department Store roof
- After Erika
- HM03WaterSurfPower 143Accuracy 100%PP 15Safari Zone
- After Koga
- TM36NormalSelf-DestructPower 130Accuracy 100%PP 5Silph Co.
- After Sabrina
- TM14IceBlizzardPower 120Accuracy 90%PP 5Pokémon Mansion
- LV 50IceIce BeamPower 95Accuracy 100%PP 10
- After Giovanni
- TM47NormalExplosionPower 170Accuracy 100%PP 5Victory Road 3F
Evolve Shellder to Cloyster
Shellder evolves into Cloyster with a Water Stone. You can buy the Water Stone at the Celadon Department Store on the 4th floor (₽2,100).
Recommended Moves
- STARTING (Lv 43)
- LV 43IceAurora BeamPower 98Accuracy 100%PP 20
- After Lt. Surge
- TM13IceIce BeamPower 143Accuracy 100%PP 10Celadon Department Store roof
- TM15NormalHyper BeamPower 150Accuracy 90%PP 5Rocket Game Corner
- TM10NormalDouble-EdgePower 100Accuracy 100%PP 15Rocket Hideout
- After Erika
- HM03WaterSurfPower 143Accuracy 100%PP 15Safari Zone
- After Sabrina
- TM14IceBlizzardPower 180Accuracy 90%PP 5Pokémon Mansion
- After Koga
- TM36NormalSelf-DestructPower 130Accuracy 100%PP 5Silph Co.
- After Giovanni
- TM47NormalExplosionPower 170Accuracy 100%PP 5Victory Road 3F
How to Get Cloyster in Red & Blue
No wild Cloyster exists. A Water Stone on a Shellder makes one instantly, and since Shellder bites on almost any rod, the stone is the only thing you really have to track down.
Catch Shellder at any of these 8 spots to eventually evolve into Cloyster.
Encountered via fishing with a Rod, tall grass encounters
- 1Catch Shellder
- 2Evolve CloysterUse Water Stone
Badge 3
Badge 4
Badge 5
Badge 6
Badge 7How to Obtain Cloyster in RB
The path to Cloyster starts with Shellder at Lv. 15-33 via fishing and walking encounters. 1 catchable stage total, with locations listed for each one below.
- Step 1Catch ShellderRoute 11Lv.15Super RodRate 50%Route 6Lv.15Super RodRate 50%Vermilion City - CityLv.15Super RodRate 50%Vermilion City - HarborLv.15Super RodRate 50%Cinnabar IslandLv.15Super RodRate 25%Route 19Lv.15Super RodRate 25%Route 20Lv.15Super RodRate 25%Route 21Lv.15Super RodRate 25%Seafoam Islands - B3FLv.15Super RodRate 25%Seafoam Islands - B4FLv.15Super RodRate 25%Seafoam Islands - B1FLv.30GrassBlueRate 20%Seafoam Islands - 1FLv.28-30GrassRedRate 19%Seafoam Islands - B3FLv.29-31GrassRedRate 15%Seafoam Islands - B2FLv.30GrassBlueRate 10%Seafoam Islands - B2FLv.28GrassRedRate 5%Seafoam Islands - B4FLv.31-33GrassRedRate 30%Seafoam Islands - B1FLv.32GrassRedRate 15%
- Step 2Cloyster ✓
Cloyster Weakness
Cloyster's Water/Ice typing leaves it vulnerable to Electric, Grass, Fighting, and Rock. Cloyster's physical bulk (base 180 Def) helps cushion physical weakness hits, but special attackers are the bigger threat.
| Damage | Types |
|---|---|
| 2x (Weak) | Electric, Grass, Fighting, Rock |
| 0.5x (Resist) | Water |
| 0.25x (Resist) | Ice |
- Only 15 types exist — Dark, Steel, and Fairy are absent
- Ghost has no effect on Psychic (a known bug, fixed in Gen II)
- Special stat governs both offense and defense — no Sp.Atk / Sp.Def split
What is Cloyster Weak Against
VulnerableBest Pokemon Against Cloyster
 Venusaur GrassPoison | C | |
Obtain MethodEvolve Bulbasaur (Pallet Town Gift) | ||
 Exeggutor GrassPsychic | S | |
 Tangela Grass | C | |
 Jolteon Electric | A | |
Obtain MethodEvolve Eevee (Celadon City Gift) Available Moves Moves
Damage vs Cloyster View Jolteon builds →Thunderbolt 2x107-126%KO Double Kick 2x9-11% | ||
 Zapdos Electric | A | |
Obtain MethodPower Plant Interact Encounter | ||
 Magneton Electric | C | |
 Parasect BugGrass | C | |
 Raichu Electric | C | |
Available Moves Moves
Damage vs Cloyster View Raichu builds →Thunderbolt 2x91-107%KO Submission 2x27-33% | ||
 Electrode Electric | B | |
Obtain MethodPower Plant Interact Encounter | ||
 Kabutops RockWater | C | |
Obtain MethodEvolve Kabuto (Cinnabar Island Gift) Available Moves Moves
Damage vs Cloyster View Kabutops builds →Submission 2x33-40% Absorb 2x11-13% | ||
 Hitmonlee Fighting | B | |
Obtain MethodSaffron City Gift Available Move Moves
Damage vs Cloyster View Hitmonlee builds →High Jump Kick 2x55-65% | ||
 Omastar RockWater | C | |
Obtain MethodEvolve Omanyte (Cinnabar Island Gift) | ||
 Machoke Fighting | C | |
Available Moves Moves
Damage vs Cloyster View Machoke builds →Submission 2x44-53% Rock Slide 2x27-33% | ||
 Rhydon GroundRock | S | |
Available Moves Moves
Damage vs Cloyster View Rhydon builds →Rock Slide 2x52-61% Submission 2x36-43% Thunderbolt 2x36-42% | ||
Cloyster Evolutions
The Water/Ice-type Cloyster caps Shellder's chain at 565 stats. No daycare options for this one. Defense grew the most through evolution (+80 over Shellder), and Cloyster peaks at 565 total stats. View every chain in the Evolution Chart.
How to Evolve
RB Cloyster Best Moveset
180 Defense and MoveClamp that locks the opponent for 2-5 turns unable to act or switch. Water/Ice TermStab covers most targets without being resisted, and MoveExplosion ends games with massive physical damage when the job is done. Traps, attacks, detonates.
Best Build
Utility Moveset
- Explosion
- Clamp
- Blizzard
- Rest
Recommended Teammates
Moves List
Level-up moves are just the starting point for Cloyster. TMs unlock Normal coverage and turn a straightforward STAB kit around Blizzard and Ice Beam into something with actual range.
How to Read the Moves Table
Tabs
- Level-Up
- Learned by leveling up.
- TM
- Taught by a Technical Machine.
- Tutor
- NPC tutor (cost: items, BP, money).
- Reminder
- An NPC reteaches any move this Pokemon could have learned by leveling up.
- Transfer
- Carried over from an older game using Pokemon HOME.
- Event
- Given out through Mystery Gift events.
Visual Signals
CAT (Category)
How the move deals damage and which stats it uses.
A small dot on the icon's corner marks the move as contact.
Tier (S to D)
Each move's competitive rank in RankedBoost's system. TM and Tutor sort by tier by default (best first). On Level-Up, click the Tier header to do the same.
PWR (Power)
Base damage. Numbers shown in a type color include STAB (base × 1.5). Hover any colored number to see the math.
— means no power (status moves) or variable power.
Sorting & Filter
Click any column header to sort. Level-Up opens with Lv 1 at the top. TM and Tutor open with the highest-tier moves at the top.
Search filters by move name or type. The Filter button limits the list to STAB, Physical, Special, or Status moves.
Level-Up Moves
TM Moves
All 21 TMs are obtainable before the Elite Four
Tutor Moves
Base Stats
When attacked, it launches its horns in quick volleys. Its innards have never been seen.
Cloyster Red & Blue Guide
In Red & Blue, use Cloyster as a balanced. Special attacks are the main output. Speed is middling, Clamp is the primary attack.
Game Availability
One of the original 151, Cloyster has appeared in 20 games: most mainline games. From Red & Blue through the latest titles, it's rarely been left out of a regional Pokedex.
Click a game to view version-specific details
- Gen 1RBDebut
Red & Blue - Gen 1Y
Yellow - Gen 2GS
Gold & Silver - Gen 2C
Crystal - Gen 3RS
Ruby & Sapphire - Gen 3E
Emerald - Gen 3FRLG
FireRed & LeafGreen - Gen 4DP
Diamond & Pearl - Gen 4Pt
Platinum - Gen 4HGSS
HeartGold & SoulSilver - Gen 5BW
Black & White - Gen 5B2W2
Black 2 & White 2 - Gen 6XY
X & Y - Gen 6ORAS
Omega Ruby & Alpha Sapphire - Gen 7SM
Sun & Moon - Gen 7USUM
Ultra Sun & Ultra Moon - Gen 7Let's Go
Let's Go Pikachu & Eevee - Gen 8SwSh
Sword & Shield - Gen 8BDSP
Brilliant Diamond & Shining Pearl - Gen 8PLA
Legends: Arceus - Gen 9SV
Scarlet & Violet - Gen 9LZA
Legends: Z-A - Gen 10WW
Winds & Waves
Explore
Where to go next after Cloyster.
Keep playing · Red & BlueRed & Blue Tier ListThe best Pokemon ranked tier by tierSee Red & Blue Tier List