http://www.smogon.com/bw/pokemon/cloyster
[SET]
name: Utility
move 1: Icicle Spear
move 2: Rapid Spin
move 3: Spikes / Toxic Spikes
move 4: Surf / Ice Shard
ability: Skill Link
nature: Relaxed / Impish
item: Leftovers
evs: 248 HP / 84 Atk / 176 Def
[SET COMMENTS]
<p>While Cloyster is normally used as a Shell Smasher, it has a unique niche defensively as well. This set focuses on its base 180 Defense and utility moves in a way similar to Forretress, but in exchange for a less useful defensive typing you gain significantly more attacking capability. STAB Icicle Spear takes out threats such as Dragonite, Substitute Gliscor, and Sturdy Level 1 Aron.</p>
<p>Icicle Spear remains the biggest selling point of Cloyster. Shell Smash, STAB, and Skill Link make up for its lack of resistances. Rapid Spin may seem like an ineffective choice when Cloyster is affected by all entry hazards and 2x weak to Stealth Rock, but it often finds opportunities to spin hazards away against physically attacking tanks, and many physical attackers on offensive teams. Spikes or Toxic Spikes should be used to soften up the opponents team or when a bulky Ghost-type switches in, but using both is inadvisable. Cloyster fills its niche more effectively with another attacking move and will certainly not have the opportunity to set up both hazards. Surf is a good secondary STAB move to broaden coverage against Steel-types, Fire-types, and Mamoswine. Ice Shard is also useful to pick up a possible KO on Gengar and to revenge kill threats such as Dragons and Landorus.</p>
[ADDITIONAL COMMENTS]
<p>Here are a few calculations to show just how bulky Cloyster is on the physical side.</p>
<ul class="damage_calculation">
<li>+1 Adamant Dragonite Outrage vs. Cloyster 52.8-62.7%</li>
<li>Jolly Terrakion Close Combat- 63.4-75.2%</li>
<li>Jolly Life Orb Terrakion Close Combat- 81.8-97%</li>
<li>Adamant Breloom Focus Punch- 87.1-103%</li>
<li>Ferrothorn Power Whip- 39.6-47.5%</li>
<li>Specially Defensive Tyranitar Superpower- 36.3-42.9%</li>
</ul>
<p>The EV spread gives Cloyster a jump point in Defense and allows it to obtain a few notable KOs. Assuming you have Stealth Rock and hail on the field, Icicle Spear will OHKO Gengar, 2HKO standard Gastrodon, and 3HKO standard Ferrothorn. If you are not running hail, the power is still useful and can get the job done on those Pokemon, but you also have the option of adding more defense. 16 SpD EVs guarantee that Cloyster will survive Dragon Pulse from an unboosted 4 SpA EVs Latias.</p>
<p>On sun teams, Hidden Power Fire is an excellent secondary attacking move; it is the ideal attack against Steel-types such as Scizor, Skarmory, and Forretress. Rain gives Surf more power, but Tentacruel and Starmie are usually better choices for rain teams. Rock Blast can make further use of Skill Link, hitting Pokemon such as Gyarados and Volcarona hard. Razor Shell may replace Surf as a secondary STAB move, but it doesn’t hit physically bulky Steel-types such as Skarmory and Forretress as hard. Lastly, Clamp or Whirlpool can be used to prevent direct switching, which may help keep momentum in your favor. However, the popularity of “Volt-Turn” tactics makes these moves less viable.</p>
<p>To maximize Cloyster's utility, it should be used only on hail, sun or weatherless teams, as sand and rain teams are better off using other Rapid Spinners. The main thing to remember when fitting this Cloyster into a team is that a resisted Surf is as threatening to Cloyster as a super effective Close Combat; in other words, you can’t rely on Cloyster to check special attackers at all. Nidoqueen is an excellent defensive partner who not only covers 3 of Cloyster's weaknesses, but also absorbs Toxic Spikes, giving Cloyster more switch-in opportunities. Latias and Celebi are also ideal partners for Cloyster; they cover 3 of its weaknesses, sponge special attacks that plague Cloyster can't take, and take advantage of Cloyster's Ice-type resistance in return.</p>
<p>Function-wise, Abomasnow and Ninetails are great partners; the former gives Cloyster the advantage of Leftovers recovery in a metagame that lacks Ice-types, while the latter allows HP Fire to be used as a solid secondary attack. A spinblocker is a good teammate to help preserve Cloyster’s hazards. Jellicent is generally the best option because it boasts more resistances than other defensive Ghost-types, which is very important considering Cloyster only resists Water- and Ice-type moves. Lastly, an alternate spinner, Prankster Taunt, or even Magic Coat user can be useful because Deoxys-S has become an incredibly common hazard lead and has no problem killing Cloyster with Psycho Boost or Thunderbolt.</p>