[Overview]
<p>When you hear people talking in veiled whispers about actually  using an Ice-type Pokemon in OU, one of the few they'll be talking about is  Mamoswine. Mamoswine's unique typing provides a neutrality to Stealth Rock,  immunity to both hail and sandstorm, and an incredibly potent offensive STAB  combination that is resisted only by Bronzong in all of DPP OU. This, in conjunction  with Mamoswine's gigantic base 130 Attack stat, STAB Earthquake, and access  to priority in the form of Ice Shard, leaves little to imagination as to  how Mamoswine survives in a metagame so hostile to Ice-type  Pokemon.</p>
<p>Mamoswine is a powerful Pokemon, but as an Ice-type, it carries all of their associated and  unfortunate weaknesses. With the prevalence of Steel-, Fighting-, Water-, and Fire-type attacks in OU, a vast number  of offensive Pokemon have the ability to outspeed and OHKO Mamoswine with  one of their typical attacks. This makes it difficult to get Mamoswine into  play, as his only free switch-ins  is are on predicted Electric-type attacks.  As if to make matters worse, Mamoswine is cursed with very mediocre Speed,  leaving him to be outsped by many common Pokemon in the tier. Despite these enormous setbacks, Mamoswine maintains his position as a moderate threat and  potent wallbreaker.</p>
[SET]
name: Physical Attacker
move 1: Earthquake
move 2: Ice Shard
move 3: Stone Edge
move 4: Superpower / Stealth Rock
item: Choice Band / Life Orb
ability: Snow Cloak
nature: Jolly / Adamant
evs: 252 Atk / 4 Def / 252 Spe
[SET COMMENTS]
<p>This set is designed to do what Mamoswine does best: knock the stuffing out of things. With excellent type coverage and a base 130  Attack stat, opponents will constantly be playing a deadly guessing game of  prediction in order to switch in something that can take Mamoswine's chosen attack. Despitethat this set is so reliable on prediction, it yields an enormous payout if  played correctly.</p>
<p>Mamoswine's Earthquake is the third-most powerful in the game,  so there's no doubt that it'llbe   on this set. Despite its low Base Power, Ice Shard is a strong move that can snipe and eliminate the many Ice-weak  Pokemon in OU. Stone Edge is Mamoswine's best option against Gyarados, and with a Choice Band it can even OHKO physically defensive Zapdos after Stealth Rock damage.  Superpower is an immensely powerful attack, chosen for an immediate OHKO on Blissey  and to deal non-negligible decent damage to Bronzong and Skarmory switch-ins. Stealth Rock is useful on Mamoswine  that carry Life Orb because he forces many switches with his power and can  easily set it up.</p>
[ADDITIONAL COMMENTS]
<p>Mamoswine isa  simple beast, and so too  as is his EV spread.  252 Attack and Speed EVs are used so that Mamoswine hits as hard and as quickly as  possible. The remaining 4 EVs are placed in Defense, as Mamoswine's HP stat is  already very high. Jolly is the preferred nature so that Mamoswine can outspeed  Naive Heatran and Adamant Lucario and OHKO both with Earthquake. Adamant is  still an option, however, as the added power is significant. The item choice  depends on how you want to use Mamoswine. Choice Band is preferred, as Mamoswine's resulting monumental Attack stat will destroy virtually anything that  doesn't resist hisattacks. However, the Choice Band set relies immensely on prediction, as since giving Pokemon like Gyarados or Zapdos free switch-ins with Earthquake is never  a good idea. Life Orb gives Mamoswine the flexibility of alternating between  attacks to ease prediction at the cost of some of his HP per hit and reduced  damage output. If using Stealth Rock, Life Orb should definitely be chosen over  Choice Band so that Mamoswine is not locked into it. Ice Fang can be used over Superpower  because it is quite a bit more powerful than Ice Shard and will 2HKO physically defensive Celebi. It is generally an inferior option, though, because between Stone Edge and Ice Shard, Mamoswine still achieves most necessary OHKOs  and 2HKOs through Stone Edge and Ice Shard.</p>
<p>With Stealth Rock in the last slot instead of Superpower,  Mamoswine can make eitheran excellent  attacking lead or an excellent complement to another attacking lead such as Machamp.  Mamoswine loathes the defensive, Ground-immune Steel-types, Bronzong and Skarmory. Bronzong can OHKO Mamoswine with Gyro Ball while Skarmory will can set up   on Mamoswine and then Whirlwind him away. Scizor causes similar  problems with his ability to survive even a Choice   Band Earthquake and OHKO Mamoswine back with Bullet Punch. It might be tempting to pair Mamoswine with  Magnezone, which nearly perfectly stops these three Steel-types in their tracks, but  because Magnezone shares a Fire- and Fighting-type weakness with Mamoswine,  alternative partners are recommended. Heatran makes for an excellent teammate forhis ability to reliably beat Skarmory, Bronzong, and Scizor, and   for having a his 4x   resistance to Steel-type attacks and an his immunity to Fire-type attacks. It is  important that you be wary of Earthquake when switching Heatran into Bronzong or Superpower when switching him it into Scizor, though. Gyarados will try to switch into Earthquake, Intimidate Mamoswine, and proceed to set up Dragon Dance. Rotom-H makes a superb  teammate for Mamoswine for its ability to take down Gyarados, OHKO Lucario and  Skarmory with Overheat and Thunderbolt, respectively, and burn Bronzong  switch-ins with Will-O-Wisp. Infernape can switch in on a predicted Ice Shard and  threaten to OHKO Mamoswine with either STAB attack, so a Gyarados of your own is a  good choice to take care of it. Starmie can also take on Infernape and simultaneously remove the entry hazards that Mamoswine doesn't  particularly enjoy, but Starmie won't want to switch into Scizor.</p>
[SET]
name: Lead
move 1: Stealth Rock
move 2: Earthquake
move 3: Ice Shard
move 4: Endeavor / Stone Edge
item: Focus Sash
ability: Snow Cloak
nature: Jolly / Adamant
evs: 252 Atk / 4 Def / 252 Spe
[SET COMMENTS]
<p>Mamoswine makes for a surprisingly effective lead, even   with his middling  below average Speed  stat, due to hisexcellent STAB attacking types, access to  priority in Ice Shard, and Stealth Rock. Mamoswine's Attack stat and STAB Earthquake  let him seriously hurt Metagross and OHKO Heatran leads through Shuca Berry.  He can also set up Stealth Rock reliably due to the switches he forces. Mamoswine is can also be functional later in the match with his excellent type coverage and powerful STAB priority.</p>
<p>Stealth Rock is an important asset for leads, and Mamoswine  sets it up well with his respectable usableSpeed and strong   offensive presence. Earthquake and Ice Shard are Mamoswine's STAB attacks on this set, providing him with both a combination of high-power and priority for crippling tanks and picking off faster leads respectively. The last slot has can include a couple of options that Mamoswine can take advantage of. Endeavor is recommended since he will  often be taken down to 1 HP with his Focus Sash, allowing him to cripple an  opposing Pokemon before finally ultimately being taken down. However, stone Edge can be used as a more reliable means to deal with Gyarados switch-ins that will attempt to set up on Mamoswine, though.</p>
[ADDITIONAL COMMENTS]
<p>252 Attack and Speed EVs are standard, allowing Mamoswine to  hit as hard and as fast as possible. The nature can be a difficult decision for  this set, though. An Adamant nature is necessary to OHKO Shuca Berry Heatran  with Earthquake, whereas a Jolly nature is necessary to outspeed the same  Heatran. Jolly tends to be more useful later in the game for outpacing Pokemon  like Jolly Breloom and Adamant Lucario, but the damage boost from Adamant is significant and can make Zapdos and Gyarados switch-ins think twice  about trying to set up on Mamoswine. A Focus Sash is necessary to survive  attacks from opposing leads so that  Mamoswine can KO them in return. Protect is worth a mention for use in the last slot over Endeavor or and Stone Edge since it enables Mamoswine to beat Infernape leads. It generally has less late-game  utility than the suggested options, but it can be useful on specific teams that have  major trouble with lead Infernape.</p>
<p>Mamoswine has trouble with Jirachi and Bronzong leads, so  Magnezone makes for a wonderful partner, even though it shares two common  weaknesses with Mamoswine. Magnezone is also useful for beating Scizor that tend to  switch into Mamoswine. Mamoswine doesn't like facing down Azelf leads, so having a  Choice Scarf Tyranitar on your team will help a lot with this, despite compounding  the Scizor weakness. Machamp leads are obnoxious andwill, in their obnoxious nature (lol don't have to add that if you don't want to), avoid a 2HKO from  Earthquake followed by Ice Shard, but  however they will take  serious damage from Earthquake regardless. Similarly, Infernape leads will beat Mamoswine  that lack Protect. Because of this, it is worth having a bulky Gyarados on your  team to switch into both Machamp and Infernape without much issue. Starmie is a  good partner if you picked Endeavor as the last move, as it can handle  Infernape well, get rid of Stealth Rock with Rapid Spin, and handle other leads  that give Mamoswine trouble. Lastly, Rotom-A is an excellent partner to lead  Mamoswine for being able to deal with the Gyarados that love setting up on him and  for its immunity to Machamp's DynamicPunch and Azelf's Explosion.</p>
[Team Options]
<p>Mamoswine partners effectively with a lot of Pokemon in OU.  Because of his wallbreaking potential, hepairs   up well with Pokemon that appreciate having such walls weakened or eliminated altogether. Gyarados and Heatran pair  the best with Mamoswine by taking  because they take care  of his checks and generally appreciating appreciate his offensive presence. Gyarados also gets a special mention for luring the Electric-type attacks that can get Mamoswine in for free. Magnezone can function well as a partner to all Mamoswine for its ability to eliminate  the Steel-types that he Mamoswine hates,   but special care must be taken for the their common Fighting- and Fire-type weaknesses between the two. Rotom-A, Rotom-H in particular, makes an excellent defensive and offensive partner to Mamoswine for  being able to threaten Steel-types with Overheat and take the Fighting- and  Steel-type attacks aimed at Mamoswine. Rotom-A also poses a threat to Gyarados that  like to attempt a setup against Mamoswine.</p>
[Optional Changes]
<p>Mamoswine has a few notable options that hecan use to great effect and to beat his normal checks. When used in hail, Blizzard can be used off of  Mamoswine's decent base 70 Special Attack stat with a Life Orb to 2HKO Skarmory.  Bite can be useful for hurting Rotom-A and Azelf, although it is too weak to be  useful anywhere else. An Expert Belt or NeverMeltIce is usable as an item to  bluff the standard Choice Band set and score some surprise KOs against Pokemon  that would normally love to set up on a Choice-locked   Earthquake, such as Zapdos, Gliscor, or Gyarados. Choice Scarf Mamoswine can be useful to catch your opponent off-guard with the added Speed. Because Mamoswine has access to  STAB Ice Shard, however, it typically is in his best interests to run an item that boosts damage in some form. Mamoswine can also set up one of either Reflect   or Light Screen on the switches that his offensive presence forces as  he forces switches with his offensive prowess, but this role is  generally better left to durable defensive Pokemon.</p>
<p>Mamoswine can run a set of Ice Shard, Earthquake, and Endeavor, and with either Substitute or Endure in the last slot in order to lure in and remove Pokemon that typically beat Mamoswine, such as Scizor or and Bronzong. This set, when used with either a Liechi Berry or Salac Berry,  can be effective due to Mamoswine's immunity to both hail and sandstorm, but although it is easily foiled by phazing from the likes of Skarmory. Mamoswine is  almost always better off using the Physical Attacker set instead and leaving  the handling of Scizor and friends to other Pokemon that are better suited  for it.</p>
[Counters]
<p>As an Ice-type Pokemon, Mamoswine has a rather unhealthy list  of responses in the OU metagame. One of the things that makes Mamoswine  viable in OU is that if the opponent mispredicts, they will likely lose a Pokemon  due to Mamoswine's raw power and STAB type coverage. Jirachi, Lucario, and  Scizor can all switch into an Ice-type attack and threaten to OHKO Mamoswine with  their STAB attacks, but will be maimed by Earthquake in the process. Similarly, Gyarados and Zapdos will try to switch into Earthquake and either set up on  Mamoswine (in Gyarados's case) or attempt to seriously damage himwith Heat Wave (in Zapdos's case). Levitate Bronzong is a textbook counter to anything Mamoswine will try  to do, bar Choice Band Superpower. It shrugs off all of Mamoswine's other  attacks and can take himdown with a super effective Gyro Ball. Skarmory functions in a similar  manner, despite having a neutrality to Ice-type attacks, but will instead set up  Spikes on Mamoswine and then Whirlwind him away. Because of Ice Shard's low  Base Power, even very defensive Pokemon that are weak to Ice-type attacks,  such as Hippowdon and Celebi, can check Mamoswine and can either set up or threaten him effectively   and set up on or threaten him. Dual Screen Uxie and Cresselia can switch into  and set up on any move with their high defensive stats and immunities to Earthquake.</p>
   
     [Team Options]
    
  <p>Mamoswine partners effectively with a lot of Pokemon in OU.  Because of his its  wallbreaking potential, he it pairs up well with Pokemon that appreciate  having such walls weakened or eliminated altogether. Gyarados and  Heatran pair the best with Mamoswine by taking  because they take care of his its checks  and generally appreciating appreciate his offensive presence. Gyarados also  gets a special mention for luring the Electric-type attacks that can get  Mamoswine in for free. Magnezone can function well as a partner to all  Mamoswine for its ability to eliminate the Steel-types that heMamoswine hates,   but special care must be taken for the  both of their common Fighting- and  Fire-type weaknesses   between the two.  Rotom-A, Rotom-H in particular, makes an excellent defensive and  offensive partner to Mamoswine for being able to threaten Steel-types  with Overheat and take the Fighting- and Steel-type attacks aimed at  Mamoswine. Rotom-A also poses a threat to Gyarados that like to attempt a  setup against Mamoswine.</p>
    
 [Optional Changes]
    
 <p>Mamoswine has a few notable options that he  it can use to great effect and to beat his normal checks. When used in  hail, Blizzard can be used off of Mamoswine's decent base 70 Special  Attack stat with a Life Orb to 2HKO Skarmory. Bite can be useful for  hurting Rotom-A and Azelf, although it is too weak to be useful anywhere  else. An Expert Belt or NeverMeltIce is usable as an item to bluff the  standard Choice Band set and score some surprise KOs against Pokemon  that would normally love to set up on a Choice-locked   Earthquake, such as Zapdos, Gliscor, or Gyarados. Choice Scarf  Mamoswine can be useful to catch your opponent off-guard with the added  Speed. Because Mamoswine has access to STAB Ice Shard, however, it  typically is in his its best interests  to run an item that boosts damage in some form. Mamoswine can also set  up one of Reflect or Light Screen on the switches  that his offensive presence forces as it forces a  switch, but this role is generally better left to durable defensive Pokemon.</p>
    
 <p>Mamoswine can run a set of Ice Shard, Earthquake, and Endeavor, and with either Substitute or Endure      in the last slot in order to lure in and remove Pokemon that typically beat  Mamoswine, such as Scizor or  andbutalthough  it is easily foiled by phazing from the  likes of Skarmory. Mamoswine is almost always better off using the  Physical Attacker set instead and leaving the handling of Scizor and  friends to other Pokemon that are better suited for it.</p>
    
 [Counters]
    
 <p>As an Ice-type Pokemon, Mamoswine has a rather unhealthy list  of responses in the OU metagame. One of the things that makes Mamoswine  viable in OU is that if the opponent mispredicts, they will likely lose a  Pokemon due to Mamoswine's raw power and STAB type coverage. Jirachi,  Lucario, and Scizor can all switch into an Ice-type attack and threaten  to OHKO Mamoswine with their STAB attacks, but will be maimed by  Earthquake in the process. Similarly,  Gyarados and Zapdos will try to switch into Earthquake and either set up  on Mamoswine (in Gyarados's case) or attempt to seriously damage him it with  Heat Wave (in Zapdos's case). Levitate Bronzong is a textbook counter to  anything Mamoswine will try to do, bar Choice Band Superpower. It  shrugs off all of Mamoswine's other attacks and can take him Mamoswine down   with a super effective Gyro Ball. Skarmory functions in a similar  manner, despite having a neutrality to Ice-type attacks, but will  instead set up Spikes on Mamoswine and then Whirlwind him away. Because  of Ice Shard's low Base Power, even very defensive Pokemon that are weak  to Ice-type attacks, such as Hippowdon and Celebi, can check Mamoswine and can either set up or threaten him effectively   and set up on or threaten him. Dual  Screen Uxie and Cresselia can switch into and set up on any move with  their high defensive stats and immunities to Earthquake.</p>
 Bronzong. This set, when used with either a Liechi Berry or Salac  Berry, can be effective due to Mamoswine's immunity to both hail and  sandstorm,