Overview
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Contrary to what it's its meager stats may tell you, Mawile is one of the biggest threats in NU. Sheer Force and Life Orb give it amazing power, boosting the power of both of its STAB moves in Play Rough and Iron Head, which have perfect coverage outside of the relatively rare Steel-types. Swords Dance boosts its power even more and lets it at least 2HKO almost every Pokemon in the metagame. Access to strong priority in Sucker Punch somewhat mitigates its low Speed. In addition, its Mawile's fantastic defensive typing lets it check Dark-, Flying-, Normal-, Psychic-, Fairy-, Ice-, Bug-, and even Poison-types, notably giving offense a counter to both Sneasel and Choice Scarf Scyther. Unfortunately, its bad defenses keep it from fully utilizing its typing to its best, though Intimidate somewhat remedies this. This is compounded by the fact that it Mawile can't run much investment in bulk, (comma) as it needs significant Speed investment to outspeed certain walls. Mawile's wide movepool contains plenty of offensive, defensive, and supportive options such as like Knock Off, Super Fang, Foul Play, Seismic Toss, Taunt, and Stealth Rock, and it can even act as a solid lure thanks to its access to special moves like such as Fire Blast and Grass Knot. (this is a fairly positive sentence, so I would put it up there with the good-stuff-about-Mawile sentences rather than after the bad-stuff-about-Mawile sentences)
Wallbreaker
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name: Wallbreaker
move 1: Play Rough
move 2: Iron Head / Fire Fang
move 3: Sucker Punch
move 4: Swords Dance / Stealth Rock
ability: Sheer Force
item: Life Orb
evs: 252 Atk / 4 Def / 252 Spe
nature: Adamant
Moves
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Play Rough is Mawile's main STAB move, having incredible power thanks to Sheer Force and Life Orb in addition to good type coverage. Iron Head is a secondary STAB attack that's still is also boosted by Sheer Force, hitting the Poison-types that resist Play Rough and having perfect accuracy. Fire Fang, on the other hand, lets it Mawile 2HKO Steel-types such as Klinklang and Ferroseed, which otherwise would that wall it otherwise. Sucker Punch is a strong priority move that allows it Mawile to perform as a revenge killer and fare better against offense. Swords Dance increases its attack and lets Mawile become a potent set-up setup sweeper. Stealth Rock is also a good option on the last slot if you can't find room for another setter, and it's rather unexpected, (comma) meaning people are unlikely to switch into Xatu or their entry hazard remover, against which it has generally good match-ups. Knock Off can be used over in any of the last three moveslots, (comma) as it's its Mawile's strongest option against Fire-type switch-ins and has the utility of removing items, however it but Mawile generally can't afford to sacrifice its other moveslots for it. Keep in mind Play Rough hits Mega Camerupt harder. Grass Knot helps against bulky Water- and Ground-types Water / Ground types such as Seismitoad and Quagsire, but this is generally not too useful.
Set Details
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The EVs and an Adamant nature maximize Attack and Speed, though Naughty can be used if you use run Grass Knot or Fire Blast. A bulkier spread of 172 HP / 252 Atk / 84 Spe gives it Mawile more bulk while outspeeding and lets it outspeed Weezing, though it's Mawile's low defenses mean it doesn't take hits all that better. Sheer Force boosts the power of its STAB moves and Fire Fang, (remove comma) and it's what gives Mawile its wallbreaking prowess. Life Orb further increases its power, and it doesn't even give Mawile recoil on its Sheer Force-boosted moves.
Usage Tips
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Switch in on resisted, preferably physical attacks such as like Mesprit's Psyshock and Sneasel's standard moveset as Mawile is frail, and avoid strong, (remove comma) special moves like such as Life Orb Jynx's Ice Beam and Life Orb Cacturne's Dark Pulse, which can 2HKO Mawile despite its resistances that can 2HKO through the resist. Be careful around Fire-type coverage moves from the likes of Vileplume and Uxie, too. Typically, (comma) you'll want to spam Play Rough, (comma) as it's your Mawile's strongest move and has good type coverage, but you can use Iron Head if you're afraid of missing. Use Fire Fang if you're in a favorable matchup and there's a Steel-type in the opposing team, as they will likely switch in and you Mawile can 2HKO most of them. The same goes for Grass Knot and Water/Ground-types like Water / Ground types such as Quagsire and Seismitoad. Try to save Swords Dance variants for late-game to sweep when the opposing team is weakened. If you need the likes of Garbodor and Weezing gone for another sweeper, however, use Swords Dance as the foe opponent goes out to them to beat them 1v1 with Iron Head. On the other hand, Stealth Rock variants should be used early-game to set it up the entry hazard and wallbreak.
Team Options
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A Pokemon that resists Fire A fire resist is a necessary partner for Mawile, especially a check for Mega Camerupt. Mega Camerupt is ironically a great partner thanks to its Fire resistance and ability to take advantage of some of its Mawile's checks and counters, such as like Weezing, Klinklang, and Garbodor. Flash Fire Pokemon, Mega Camerupt, Hariyama, Water-types, and Bulky (if that's a set name, okay. otherwise, make it lowercase) Archeops and others work well in this regard, too. Pokemon that can switch into the Steel- and Ground-types that Mawile can't 2HKO such as Seismitoad, Ferroseed, and Sandslash are important as well.; (semicolon) Seismitoad, Fire-types, and Vileplume work well. Sneasel, Scyther, Tauros, and Calm Mind Uxie, among others are sweepers that devastate teams once Steel-types are gone, which Mawile can lure in and beat with Fire Fang, are gone. Similarly, if you run Iron Head, you Mawile can significantly damage, (comma) if not outright beat, (comma) Poison-types. Samurott, Ludicolo, Mega Audino, and Fighting-types in general highly appreciate them gone. Psychic-types take on Poison-types for Mawile lacking Iron Head while it handles the Dark-types that give them trouble. Xatu in particular also stops entry hazard setters like such as Seismitoad, Ferroseed, Garbodor, and Toxic Spikes Weezing from taking advantage of Mawile it, and it helps weaken Steel-types with Rocky Helmet and Heat Wave. Cacturne can lure in Poison-types and other physical walls and smack them with Dark Pulse or Giga Drain, (remove comma) while also setting up Spikes to wear down the opposing team for Mawile. Mawile is one of the best options for Trick Room teams thanks to its insane power, low Speed stat, and fantastic typing.
Defensive
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name: Defensive
move 1: Stealth Rock
move 2: Play Rough
move 3: Super Fang / Toxic / Iron Head
move 4: Baton Pass / Taunt / Pain Split
ability: Intimidate
item: Leftovers
evs: 252 HP / 188 Def / 64 SpD / 4 Spe
nature: Impish
Moves
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Stealth Rock is a necessity on every team, and Mawile's access to it Stealth Rock makes it a valuable defensive Pokemon and separates it from other Fairy-types. (not a super necessary change so if you really like it you can keep it; I just think that having multiple "it"s that refer to different things is awkward) Play Rough is its Mawile's strongest STAB move and hits the Dark- and Fighting-types it checks super effectively. Super Fang is usually its best way of dealing damage, halfing halving the foe's HP and thus making it easier to take out. Toxic whittles down Pokemon quickly and cripples switch-ins, however but it may end up being useless for the majority of the match if there's a there are Steel- or Poison-types in on the opposing team. Iron Head hits Pokemon like such as Mega Audino, Rhydon, Archeops, Muk, and Haunter for good damage, (remove comma) and generally has solid coverage with Play Rough. Knock Off gives it Mawile coverage for the Psychic-types it checks, especially punishing Xatu switching in to bounce back Stealth Rock, and removes items, but it's generally weak unless it hits something super effectively. Seismic Toss does consistent damage and can at least 4HKO most Pokemon. Baton Pass lets Mawile function as a bulky pivot that maintains momentum. Taunt lets it shut down slower, (comma) bulky set-up setup sweepers like such as Musharna, Calm Mind Mega Audino, and Gurdurr, who all of which can otherwise set up all over Mawile it. It also stops slower walls such as Vileplume and Ferroseed from healing themselves, setting up entry hazards, or and using a status or utility moves, but you have to be careful of Hidden Power Fire in the former's case. Pain Split provides another form of recovery and that takes advantage of its Mawile's low HP, but it can be somewhat unreliable.
Set Details
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The HP and Special Defense EVs let Mawile always avoid the 2HKO from Life Orb Jynx's Ice Beam after Stealth Rock, with the rest dumped into Defense. (not true because there are 252 HP EVs and 4 Speed EVs still, sooo) 4 Speed EVs are important to outspeed uninvested (Mega) Audino and so that Mawile can reliably Taunt it before it can set up or use Rest. The rest of the EVs and an Impish nature further increases its defense Mawile's Defense. Intimidate gives Mawile the bulk to check physical attackers. Leftovers is Mawile's only form of recovery outside of Pain Split. Rocky Helmet can be used instead to punish Scyther's and Mesprit's U-turns, but it Mawile appreciates Leftovers's passive recovery more. (period)
Usage Tips
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The main reason you'd use Mawile over any other defensive Steel-type is its ability to check Fighting-types, so capitalize on that throughout the game. Do note that it lacks reliable recovery, so it can be worn down over time. Mawile prefers to come in on resisted physical attacks, but the bulk investment and Intimidate allow it to take even strong neutral physical attacks such as Hariyama's Close Combat, non-STAB super effective physical hits, and powerful resisted special attacks. Set up Stealth Rock early-game on something a foe that can't threaten you Mawile, such as Sneasel or Kangaskhan. Most of the time, you will want to use Super Fang on switch-ins, (comma) as it usually will deal the most damage out of its Mawile's moves, which and is especially useful in wearing down pokemon like Pokemon such as Seismitoad and Mega Camerupt for teammates. Toxic is similarly spammable if there's there are no Steel- or Poison-types on in the opposing team. When in against something up against a foe Mawile walls, use Baton Pass as they switch out to go to a teammate and gain momentum. Come in on set-up setup sweepers like such as CroDino, (you're going to have to un-abbreviate that) Musharna, Gurdurr, and Substitute + Calm Mind Uxie and Taunt them so that they can't set up more or heal themselves. Whittle them down with Super Fang, Play Rough, (space) Toxic, Seismic Toss, or Knock Off them to death as you will beat them before they beat you. If you're Mawile is low on health, use Pain Split as the opponent goes into their Mawile switch-in, but make sure they're the switch-in is relatively healthy, or else as Mawile might actually lose health if not.
Team Options
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Teammates that resist Fire resists are a must, (comma) as Mawile gives most Fire-types free switches in of them free switch-ins. Bulky Water-types, Hariyama, and Bulky (if this is not an actual set name, then make it lowercase) Archeops, among others work well in this regard. Likewise, switch-ins to Ground- and Steel-types are important, (comma) as they those foes can threaten Mawile while it can't do much of anything back. Again, bulky Water-types and Hariyama fit the bill nicely, but Xatu, Vileplume, and Fighting- and Fire-types in general, among others pair well with Mawile, too. Answers for set-up to setup sweepers like that can take advantage of Mawile, such as Samurott and Malamar, (comma) that can take advantage of it are appreciated, with; (semicolon) Quagsire, especially Curse variants, being is a good blanket check or counter to them. Xatu stands out as a great partner, (comma) as it can bounce back the entry hazards from the likes of Garbodor, Seismitoad, and Ferroseed, all of which can take advantage of Mawile it, and is a solid secondary check to Fighting-types. In return, Mawile easily takes on the Dark- and Ice-types that threaten it. Mawile can wear down Steel-types, Mega Camerupt, and even Poison-types by using Super Fang as they switch in. This makes Pokemon that appreciate them gone, such as like Sneasel, Scyther, Tauros, Typhlosion, and Uxie, (comma) good partners. A Mawile's slow Baton Pass lets it bring in Mawile send out a teammate that wouldn't be able to safely come in otherwise, making wallbreakers that can take advantage of Mawile's its switch-ins, such as like Choice Specs Aurorus, Typhlosion, and Exeguttor Exeggutor, excellent partners.
Other Options
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A Baton Pass set can abuse it's take advantage of Mawile's great typing and Intimidate to set up and pass Swords Dance boosts to physical attackers that take advantage of its Mawile's Ground-, Steel-, and Fire-type switch-ins, (comma) such as Archeops, Sawk, Hariyama, Rhydon, Poliwrath, and Samurott, among others. A special lure set with Fire Blast / Grass Knot / Flash Cannon / Baton Pass / Focus Blast can be used to lure and beat its Mawile's usual switch-ins, such as like Steel-types, bulky Water-types, and other physical walls, (comma) for another sweeper, but it has few uses otherwise. Foul Play works decently in well on the defensive set to use the foe's Attack pokemon's attack against them, but it lacks the consistent, high damage of Super Fang and the utility of Knock Off.
Checks & Counters
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**Steel- and Fire-types**: Steel- and Fire-types resist both of Mawile's STABs STAB types and can threaten it with their own STAB moves STABs. However, offensive Fire-types generally take a good chunk from Play Rough from the wallbreaker set and can be revenge killed by Sucker Punch when they're weakened, while Steel-types are hit super effectively by Fire Fang or even Fire Blast. None of them particularly like to take a Super Fang as they switch in, either. Mega Camerupt and Pyroar get special mentions due to the former's good bulk and the latter's ability to burn it Mawile with Will-O-Wisp as it goes for the Sucker Punch.
**Physical Walls**: Certain physical walls, such as like Seismitoad, Quagsire, and Weezing, (comma) can switch into it Mawile and threaten it with their moves attacks or a burn, but they are dented significantly by Play Rough or and Iron Head. Pokemon with good physical bulk, (comma) such as like Sandslash, (comma) also fall into this category.
**Entry Hazard Control**: Xatu is a threat to the defensive set, though not the wallbreaker set, because; (semicolon) although it is crippled by Super Fang or and Knock Off, it prevents Mawile from setting up Stealth Rock and 2HKOes it with it Heat Wave. Defoggers and spinners like such as Pelipper, Claydol, and Sandslash are also reliable switch-ins that can get rid of Stealth Rock, but none of them appreciate getting hit by Super Fang or having their item removed getting their item knocked off.
**Faster Pokemon**: Though Sucker Punch somewhat remedies Mawile's low Speed, it is not very strong without a boost, meaning pokemon like Pokemon such as Typhlosion, Sawk, Earthquake Bulky Archeops (is this an actual set name?), and Offensive Seismitoad (is this a well-known set name? if not, make it "offensive Seismitoad"), among others can easily revenge kill Mawile it.