Cloyster in Pokémon GO

Type	Water / Ice
Pokédex number	#91
Base Attack / Defense / Stamina	186 / 256 / 137
Max CP, level 40 / 50 / 51	2,547 / 2,880 / 2,914
Max HP, level 50	127
Buddy distance	3 km per Candy
Second Charged Attack	50,000 Stardust and 50 Candy
Height / weight	1.5 m / 132.5 kg

Cloyster evolution

Pokémon GO has no evolution levels: a Pokémon evolves when you spend Candy on it (sometimes with an item or a task), at any level.

Cloyster evolves from Shellder for 50 Shellder Candy.

Cloyster is the last stage of its family: it does not evolve further.

Family: Shellder · Cloyster

Cloyster CP by level

Combat Power with perfect stats (15/15/15) and with 10/10/10. Players find that raid, egg and research catches never have a stat below 10; that floor is their measurement, not a number in the game data.

Level	CP 15/15/15	CP 10/10/10	HP 15/15/15	Note
15	1,092	1,037	78	research rewards are at most level 15 (game master)
20	1,455	1,383	90	eggs hatch at most level 20 (game master); raid catches are level 20 (players’ measurement)
25	1,819	1,729	101	raid catches in weather that boosts the boss’s type are level 25 (players’ measurement)
30	2,184	2,075	111	wild Pokémon are at most level 30 (game master)
35	2,366	2,247	115
40	2,547	2,420	120
45	2,711	2,576	123
50	2,880	2,736	127
51	2,914	2,769	128	best buddy bonus on a level 50 Pokémon

Cloyster best moveset

Ranked by damage per second over one cycle of fast attacks and one charged attack. Assumptions: Cloyster at level 40 with 15/15/15, a target with 180 Defense taking neutral damage, no weather boost, and the energy Cloyster gains from being hit left out.

Fast attack	Charged attack	Damage per second
Ice Shard	Avalanche	10.1
Ice Shard	Blizzard	9.9	Elite TM
Frost Breath	Razor Shell	9.8
Ice Shard	Razor Shell	9.8
Ice Shard	Hydro Pump	9.8

Fast attacks

Move	Type	Power	Energy	Time	Power / s
Frost Breath	Ice	11	9	1 s	11.0	same type, ×1.2
Ice Shard	Ice	10	10	1 s	10.0	same type, ×1.2

Charged attacks

Move	Type	Power	Energy cost	Time	Power / s
Aurora Beam	Ice	80	50	3.5 s	22.9	same type, ×1.2
Avalanche	Ice	85	50	2.5 s	34.0	same type, ×1.2
Blizzard	Ice	130	100	3 s	43.3	same type, ×1.2, Elite TM
Hydro Pump	Water	135	100	3.5 s	38.6	same type, ×1.2
Icy Wind	Ice	65	33	3.5 s	18.6	same type, ×1.2
Liquidation	Water	70	33	3 s	23.3	same type, ×1.2
Razor Shell	Water	55	33	1.5 s	36.7	same type, ×1.2

Cloyster weaknesses and resistances

Damage multipliers for each attack type against Water / Ice. Pokémon GO uses ×1.6 for super effective and ×0.625 for not very effective, multiplied for two types.

Attack type	Damage
Electric	×1.6
Fighting	×1.6
Grass	×1.6
Rock	×1.6
Ice	×0.39
Water	×0.625

Cloyster CP calculator

Level Attack IV Defense IV HP IV

CP 2,547 · HP 120

← #90 Shellder  ·  #92 Gastly →  ·  All Pokémon in Pokémon GO

Sources: stats, moves, evolution costs and the CP multiplier for each level are from the Pokémon GO game master as published by PokeMiners (commit 8e227be, data of 28 August 2026). Which Pokémon are in the game: pogoapi.net (list of 31 January 2026). CP = ⌊(Attack+IV) × √(Defense+IV) × √(Stamina+IV) × CPM² / 10⌋, checked against pogoapi.net’s max CP table for 888 Pokémon. Raid catch levels and the 10/10/10 floor are players’ measurements; they are not in the game data. Pokémon and Pokémon GO are trademarks of their owners; this page is not affiliated with or endorsed by Niantic, Scopely, Nintendo, Creatures, GAME FREAK or The Pokémon Company.