Competitive Information for Cloyster [Ruby/Sapphire]
Water / Ice
Abilities:
This Pokemon cannot be struck by a critical hit.

Disclaimer: All videos and opinions are owned by their respective creators and may not reflect our views.
Movesets for Singles
Looking for a competitive moveset for Cloyster? These builds are optimized for Ruby/Sapphire Single Battles. The movesets and EVs are designed to maximize damage against common opponents and threats in the Ruby/Sapphire metagame. Check out the expert movesets below to boost your battle performance and dominate your opponents!
Get hyped for Cloyster, a sensational Pokémon with Water and Ice typing! It's a sight to see Cloyster out in the 3rd generation battlefield. It is weak to Electric, Fighting, Grass, and Rock-typed attacks. Explore the movesets below to see how Cloyster performs in battles.
Item: Leftovers / Salac Berry
Ability: Shell Armor
Nature: Timid (+Spe, -Atk)
EVs: 248 Hp / 8 SpA / 252 Spe
Moveset:
- Ice Beam
- Surf
- Spikes
- Substitute
Cloyster proves to be an astounding Support for single battles. Back before Generation IV, a move's damage category was determined by its type. Leftovers are always a great recovery option to ensure Cloyster last longer regaining it's life every turn. With Shell Armor, Cloyster cannot be struck by a critical hit. With a Salac Berry equipped to it, raises Cloyster's speed by 1 stage when at 1/4 max hp or less then the Salac Berry gets consumed.
◆ Surf is a special STAB-boosted 95-base power Water-type move (hits foes. Power doubles against dive).
◆ Spikes is a status move (hurts grounded foes on switch-in. Max 3 layers).
◆ Substitute is a status move (Cloyster takes 1/4 its max hp to put in a substitute).
Link (click to copy):
https://hohoushome.com/b/caa5b
Item: Shell Bell / Silk Scarf
Ability: Shell Armor
Nature: Adamant (+Atk, -SpA)
EVs: 252 Atk / 4 SpD / 252 Spe
Moveset:
- Double-Edge / Return
- Barrier
- Toxic
- Spikes
Cloyster shows a noteworthy Physical Sweeper prowess in single battles. This moveset was created to crush rivals using forceful physical moves. Back before Generation IV, a move's damage category was determined by its type. The Shell Bell item option is to help Cloyster recover from the recoil damage it may take from Double-Edge. With Shell Armor, Cloyster cannot be struck by a critical hit. With a Silk Scarf equipped to it, Cloyster's normal-type attacks have 1.1x power.
◆ Return is a physical 0-base power Normal-type move (max 102 power at maximum happiness).
◆ Barrier is a status move (raises your Cloyster's defense by 2 stages).
◆ Toxic is a status move (badly poisons the target).
◆ Spikes is a status move (hurts grounded foes on switch-in. Max 3 layers).
Link (click to copy):
https://hohoushome.com/b/cba5b
Item: Mystic Water
Ability: Shell Armor
Nature: Modest (+SpA, -Atk)
EVs: 252 SpA / 4 SpD / 252 Spe
IVs: 0 Atk
Moveset:
- Surf / Bubble Beam
- Ice Beam / Aurora Beam
- Barrier
- Toxic
In single battles, Cloyster is known as a stunning Special Sweeper. It's designed to overwhelm foes with potent special moves. Before Generation IV, a move's damage category was determined by its type. With Shell Armor, Cloyster cannot be struck by a critical hit. With a Mystic Water equipped to it, Cloyster's water-type attacks have 1.1x power.
◆ Bubble Beam is a special STAB-boosted 65-base power Water-type move (10% chance to lower the target's speed by 1 stage).
◆ Ice Beam is a special STAB-boosted 95-base power Ice-type move (10% chance to freeze the target).
◆ Aurora Beam is a special STAB-boosted 65-base power Ice-type move (10% chance to lower the target's attack by 1 stage).
◆ Barrier is a status move (raises your Cloyster's defense by 2 stages).
◆ Toxic is a status move (badly poisons the target).
Link (click to copy):
https://hohoushome.com/b/cca5b
Movesets for Doubles
Need a strong doubles moveset for Cloyster? These builds are perfect for VGC (Pokémon Video Game Championship) and other competitive Ruby/Sapphire Double Battles. The VGC is the ultimate test of strategy and skill, and these movesets and EVs are designed to excel against multiple opponents at once while providing essential support to your team. Dominate the Ruby/Sapphire metagame with these expert-crafted setups!
Item: Shell Bell / Silk Scarf
Ability: Shell Armor
Nature: Adamant (+Atk, -SpA)
EVs: 252 Atk / 4 SpD / 252 Spe
Moveset:
- Double-Edge / Return
- Barrier
- Toxic
- Spikes
Cloyster thrives as a stunning Physical Sweeper perfect for double battles. It tries to crush rivals using lethal physical moves. Remember prior to Generation IV, a move's damage category was determined by its type. The Shell Bell item option is to help Cloyster recover from the recoil damage it may take from Double-Edge. With Shell Armor, Cloyster cannot be struck by a critical hit. With a Silk Scarf equipped to it, Cloyster's normal-type attacks have 1.1x power.
◆ Return is a physical 0-base power Normal-type move (max 102 power at maximum happiness).
◆ Barrier is a status move (raises your Cloyster's defense by 2 stages).
◆ Toxic is a status move (badly poisons the target).
◆ Spikes is a status move (hurts grounded foes on switch-in. Max 3 layers).
Link (click to copy):
https://hohoushome.com/b/daa5b
Item: Mystic Water
Ability: Shell Armor
Nature: Modest (+SpA, -Atk)
EVs: 252 SpA / 4 SpD / 252 Spe
IVs: 0 Atk
Moveset:
- Surf / Bubble Beam
- Icy Wind / Ice Beam
- Barrier
- Toxic
Cloyster is an extraordinary Special Sweeper to use for double battles. It is primarily designed to take down the opponent's team with overwhelming special moves. In the dark days before Generation IV, a move's damage category was determined by its type. With Shell Armor, Cloyster cannot be struck by a critical hit. With a Mystic Water equipped to it, Cloyster's water-type attacks have 1.1x power.
◆ Bubble Beam is a special STAB-boosted 65-base power Water-type move (10% chance to lower the target's speed by 1 stage).
◆ Icy Wind is a special STAB-boosted 55-base power Ice-type move (100% chance to lower the foes speed by 1 stage).
◆ Ice Beam is a special STAB-boosted 95-base power Ice-type move (10% chance to freeze the target).
◆ Barrier is a status move (raises your Cloyster's defense by 2 stages).
◆ Toxic is a status move (badly poisons the target).
Link (click to copy):
https://hohoushome.com/b/dba5b
Movepool
Want to know what moves Cloyster can learn? Check out the full list of moves available in the Pokemon Ruby/Sapphire generation.
Sort and organize the learnset by type, category, accuracy, and power. Moves in bold get the same-type attack bonus (STAB) when used by Cloyster.
Damage Modifiers:
Combo List
These are a list of several common move combinations Cloyster can perform in Ruby/Sapphire. Not every combo going to be game-changing, but some can be pretty fun to play with. Sometimes these can be easily overlooked or forgotten, hence why we find and list them here. Discover what items, abilities, and moves this Pokemon can use in combination with each other to gain a strategic advantage in competitive battles.
Competitive RS Move and Ability Combos for Cloyster
- Moves: Swagger + Screech
- Moves: Rest + Sleep talk
- Moves: Rest + Snore
- Move: Swagger + Item: Mirror Herb
- Move: Facade + Item: Flame Orb
- Move: Facade + Item: Toxic Orb
- Moves with Priority: Endure, Protect
- Moves that inflict status: Toxic
Moves that boost Cloyster's stats
- Barrier
- Rapid Spin
- Withdraw
Most notable and possible best moves for Cloyster
- Explosion
- Ice Beam
- Protect
- Rapid Spin
- Rest
- Spikes
- Substitute
- Surf
- Toxic
Common Effort Values for Cloyster in Ruby and Sapphire
- Timid Nature ( 248/0/0/8/0/252/ )
- Timid Nature ( 252/0/0/0/72/184/ )
- Optimize Cloyster's Defensive EV-spread for Pokemon Ruby and Sapphire
Usage Data
Explore the latest analytical usage data for this Pokémon from various VGC and online competitions. We use this data to develop our strategies and movesets. The data is categorized by competition and skill level: top-ranking trainers, mid-level players, and entry-level players.

THIS SECTION IS CURRENTLY UNDER CONSTRUCTION
Some builds on this page have been hidden, click here to display them
Here are the best movesets for Cloyster. Top rated Cloyster Ruby/Sapphire movesets. You can find Cloyster builds Ruby/Sapphire. Cloyster movesets Ruby/Sapphire are listed here. VGC Cloyster Competitive Movesets can be found here. Find various EV spreads, find the best nature for Cloyster in Ruby/Sapphire along with competitive movesets. Basic info and Movesets for evolution