#089 MukAll 251 Pokémon#091 Cloyster![]()
Gengar’s Pokédex · Kanto · Generation I
#090 Shellder
Water
- SpeciesBivalve Pokémon
- Japanese nameShellder
- PronunciationSHELL-DER
- Height1′ 0″ 0.30 m
- Weight9.0 lb 4.05 kg
- Gender♂ 50% · ♀ 50%

PokédexWhere to findType matchupsMovesBreedingStats

Pokédex entries
| RedBlue | Its hard shell repels any kind of attack. It is vulnerable only when its shell is open. |
|---|---|
| Yellow | The shell can withstand any attack. However, when it is open, the tender body is exposed. |
| Stadium | Its shell is harder than diamond. It hides in sand on the sea floor and catches prey with its soft tongue. |
| GoldStadium 2 | It swims facing backward by opening and closing its two-piece shell. It is surprisingly fast. |
| Silver | Grains of sand trapped in its shells mix with its body fluids to form beautiful pearls. |
| Crystal | Clamping on to an opponent reveals its vulnerable parts, so it uses this move only as a last resort. |
Where to find Shellder
| Game | Where to find it | Time | Rarity |
|---|---|---|---|
| Blue | Fishing (Vermilion City, Seafoam Island, Cinnabar Island, Routes 6, 11, 19, 20, 21) | NA | Few |
| Red | NA | Many | |
| Yellow | Fishing (S.S. Anne, Routes 17 & 18) | NA | Few |
| Gold | Fishing (Cinnabar Island, New Bark Town, Olivine City (Harbor), Pallet Town, Vermilion City, Routes 20, 21, 26, 27, 41) | Any | Many |
| Silver | Any | Many | |
| Crystal | Any | Many |
How to catch
| Ground | Surf | Fishing | Forest Tree | Mountain Tree | Rock Smash | Breed | Evolve | Event | BugCatch | Game Corner | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| R/B | ✓ | ||||||||||
| Yellow | ✓ | ||||||||||
| G/S | ✓ | ✓ | |||||||||
| Crystal | ✓ | ✓ |
✓ marks how you can get it in each game. Shaded boxes are methods that didn’t exist in that game.
Type matchups
Defence: damage taken from each attack type
- Normal×1
- Fire×0.5
- Water×0.5
- Electric×2
- Grass×2
- Ice×0.5
- Fighting×1
- Poison×1
- Ground×1
- ×1
- Psychic×1
- Bug×1
- Rock×1
- Ghost×1
- Dragon×1
- Dark×1
- Steel×0.5
- Gold, Silver & Crystal: 2 weaknesses and 4 resistances out of 17 types. Defence ratio 1 : 2 (50%).
- Red, Blue & Yellow: 2 weaknesses and 3 resistances out of 15 types. Defence ratio 2 : 3 (~67%).
- This Pokémon has more weaknesses in GSC than in RBY. So this Pokémon has a better defense ratio in RBY.
Offence: same-type attacks against each type
- NormalNormal
- FireGood
- WaterBad
- ElectricNormal
- GrassBad
- IceNormal
- FightingNormal
- PoisonNormal
- GroundGood
- Normal
- PsychicNormal
- BugNormal
- RockGood
- GhostNormal
- DragonBad
- DarkNormal
- SteelNormal
- Gold, Silver & Crystal: 3 advantages and 3 disadvantages out of 17 types. Offensive ratio 1:1 (100%).
- Red, Blue & Yellow: 1 advantage and 1 disadvantage out of 15 types. Offensive ratio 1:1 (100%).
Moves learned by levelling up
| R/B/Y | G/S/C | Move | Type | Kind |
|---|---|---|---|---|
| Start | Start | Tackle | Normal | Physical |
| Start | Start | Withdraw | Water | Status |
| 18 | 9 | Supersonic | Normal | Status |
| 30 | 17 | Aurora Beam | Ice | Special |
| — | 25 | Protect | Normal | Status |
| 39 | 33 | Leer | Normal | Status |
| 23 | 41 | Clamp | Water | Special |
| 50 | 49 | Ice Beam | Ice | Special |
“Start” means it knows the move from level 1; a dash means it doesn’t learn the move by levelling up in that game.
Move Tutor Crystal
- Ice Beam
TMs & HMs Gold, Silver & Crystal
- TM03Curse
- TM06Toxic
- TM10Hidden Power
- TM13Snore
- TM14Blizzard
- TM16Icy Wind
- TM17Protect
- TM18Rain Dance
- TM20Endure
- TM21Frustration
- TM27Return
- TM32Double Team
- TM34Swagger
- TM35Sleep Talk
- TM39Swift
- TM44Rest
- TM45Attract
- HM03Surf
- HM06Whirlpool
TMs & HMs Red, Blue & Yellow
- TM06Toxic
- TM09Take Down
- TM10Double-Edge
- TM11Bubblebeam
- TM12Water Gun
- TM13Ice Beam
- TM14Blizzard
- TM20Rage
- TM30Teleport
- TM31Mimic
- TM32Double Team
- TM33Reflect
- TM34Bide
- TM36Self Destruct
- TM39Swift
- TM44Rest
- TM47Explosion
- TM49Tri Attack
- TM50Substitute
- HM03Surf
Breeding Gold, Silver & Crystal
| Egg groups | Water 3 Pokémon group 10 |
|---|
Compatible Pokémon
Egg moves
| Move | How to pass it down |
|---|---|
| Barrier | Mate with a male Tentacool/Tentacruel. |
| Bubblebeam | Mate with a male Corsola or Tentacool/Tentacruel. |
| Rapid Spin | Breed a male from Squirtle Family and a female Kabuto/Kabutops, then breed the male offspring with a female Shellder/Cloyster. |
| Screech | Mate with a male Tentacool/Tentacruel. |
| Take Down | Teach RBY TM09 (Take Down) to a Pokémon from Kabuto, Krabby, Omanyte, Shellder, or Tentacool Family and trade it to GSC. If male, mate with a female Shellder/Cloyster. |
Stats
| Stat | Base | Range at Lv. 100 | G/S/C rank | R/B/Y rank |
|---|---|---|---|---|
| HP | 30 | 233-263 | 42/4510.60% | 39/4210.60% |
| Attack | 65 | 198-228 | 24/4940.14% | 24/4538.21% |
| Defense | 100 | 268-298 | 12/5584.13% | 9/4487.46% |
| Speed | 40 | 148-178 | 40/4715.87% | 37/4213.57% |
| Special Attack G/S/C | 45 | 158-188 | 34/4621.19% | — |
| Special Defense G/S/C | 25 | 118-148 | 40/415.48% | — |
| Special R/B/Y | 45 | 158-188 | — | 23/2918.41% |
| Total | 305 G/S/C 280 R/B/Y |
1123-1303 1005-1155 |
64/8715.87% | 44/6521.19% |
Ranges are the lowest and highest the stat can be at level 100. Ranks compare the base stat with every other Pokémon in those games (1 is the highest), with its percentile underneath.
Restored from Gengar’s Online Pokédex v4.2, one of the first Pokédexes on the web, created by Curtis Alumbaugh (Gengar) with Ian Alumbaugh (Haunter) and kept by Pokémon Dungeon. How to read this page · Red, Blue & Yellow moves · The Library