
Overview
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Mega Heracross is one of the deadliest wallbreakers available in OU, thanks to its massive base 185 Attack stat allowing it to plow through many defensive threats. Mega Heracross is also a threat to offensive teams, as its respectable bulk and five resistances usually allow it to live at least one hit and retaliate hard, forcing many switches. Not even Pokemon with Substitute are safe, as Skill Link turns normally underwhelming moves such as Pin Missile, Rock Blast, and Bullet Seed into potent weapons. Not all is perfect for Mega Heracross though, as it has weaknesses to several common offensive types; this combined with its mediocre base 75 Speed after Mega Evolving can leave it fairly easy to force out. Much like most physical attackers, Mega Heracross is vulnerable to all forms of status, especially burns, and its lack of recovery means that Mega Heracross, despite its decent bulk, can be worn down quickly.
Wallbreaker
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name: Wallbreaker
move 1: Close Combat
move 2: Pin Missile
move 3: Rock Blast
move 4: Swords Dance / Substitute
ability: Moxie / Guts
item: Heracronite
evs: 4 HP / 252 Atk / 252 Spe
nature: Jolly
Moves
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Close Combat is Mega Heracross's most spammable STAB attack, as it has high power and decent coverage. Pin Missile is the strongest attack that Mega Heracross has to offer, not only breaking through Substitutes, but also threatening Slowbro and Mew. Rock Blast is the advised coverage move, as it can nail Flying- and Fire-types. The choice between Swords Dance and Substitute depends on whether you want to break through walls more easily or block status and punish predicted switches.
Set Details
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Full investment in Attack EVs maximize damage output, whilst 252 Speed EVs with a Jolly Nature allow Mega Heracross to outrun Mega Tyranitar, Breloom, and Bisharp, Adamant variants of Gyarados, Dragonite, and Diggersby, Jolly Mamoswine before Mega Evolving, and Speed tie with Smeargle. Moxie can give Heracross a boost in power before Mega Evolving, which is especially relevant when lacking Swords Dance. Alternatively, Guts can be useful in case Heracross gets burned before Mega Evolving so it isn't completely useless.
Usage Tips
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Mega Heracross should come in when the opponent attempts to heal their wall. After that, the wall will likely be forced to switch out, potentially giving it another free turn to land a powerful blow or set up with Swords Dance or Substitute. Because its item can't be removed and it resists the move, Mega Heracross makes for a great switch-in to Knock Off; this allows it to setup on Pokemon like Bisharp.
Team Options
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Mega Heracross enjoys having a cleric on the team because it's worn down fairly easily due to its vulnerability to status and lack of recovery. Sylveon or Clefable can help keep Mega Heracross healthy with Wish and Heal Bell; Sylveon has better overall bulk, while Clefable takes on stall teams more effectively. Paralysis support is very convenient, as Mega Heracross can easily KO frail sweepers after they have been crippled. Thundurus is a great candidate with Prankster Thunder Wave, and he also threatens both physical walls and sweepers. Mega Heracross in return helps break down special walls for Thundurus, creating solid synergy. For a more defensive paralysis spreader, Jirachi makes for a great partner, and it can also support the team with Wish and Healing Wish, so it isn't limited to a paralyzing role. Healing Wish Latias can fully heal Mega Heracross if it gets worn down, while also threatening faster foes and physical walls. Having an answer to Talonflame is important; Rotom-W is able to take a hit relatively easily and either 2HKO bulky variants or OHKO offensive variants with Hydro Pump. You can also predict a switch and provide a free switch for Mega Heracross with Volt Switch.
Swords Dance + Substitute
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name: Swords Dance + Substitute
move 1: Close Combat
move 2: Rock Blast
move 3: Swords Dance
move 4: Substitute
ability: Moxie / Guts
item: Heracronite
evs: 4 HP / 252 Atk / 252 Spe
nature: Jolly
Moves
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Close Combat is Mega Heracross's best STAB attack, boasting both high power and good coverage. Rock Blast is the obligatory secondary offensive move, as it has better coverage than Pin Missile, which you can afford to give up. Swords Dance raises the Attack of Mega Heracross to frightening levels and makes wallbreaking significantly easier. Substitute gives Mega Heracross protection from status moves and also is a good option when you predict the opponent will switch out.
Set Details
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Full investment in Attack and Speed with a Jolly nature maximize Mega Heracross's damage output and allow it to outrun Mega Tyranitar, Breloom, and Bisharp, Adamant variants of Gyarados, Dragonite, and Diggersby, Jolly Mamoswine before Mega Evolving, and Speed tie with Smeargle. Moxie can give Heracross a boost in power before Mega Evolving and can potentially save you a turn spent setting up with Swords Dance. Alternatively, Guts can be useful in case Heracross gets burned before Mega Evolving; just remember that Rock Blast won't be as reliable before Mega Evolving.
Usage Tips
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Don't set up a Substitute or Swords Dance without thinking about it first; Swords Dance is usually the better move to use when they attempt to heal off any damage taken, while Substitute is the better move to use when you predict either a status move or a switch. Knock Off stays at 65 BP when used on Mega Heracross, even before Mega Evolving, so Mega Heracross makes for a good Knock Off switch in.
Team Options
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Sylveon and Clefable can keep Mega Heracross healthy with Wish and Heal Bell. Thundurus is a great partner, thanks to Prankster Thunder Wave crippling faster foes. Latios and Latias also have nice synergy with Mega Heracross, thanks to their ability to lure in Ferrothorn and threatening various answers to Mega Heraross, including fast sweepers and physical walls. Landorus-T can keep Flying-types in check and use U-turn to provide Mega Heracross with a safe switch-in against Pokemon such as Ferrothorn and Rotom-W. Bisharp can trap Latios and Latias with Pursuit or OHKO them with Sucker Punch and easily eliminate Clefable with Iron Head. Rotom-W is a great teammate that can threaten physical walls decently enough and can take on Talonflame reliably.
Other Options
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Knock Off can be used in the fourth moveslot to remove Eviolite and Leftovers from walls, but it is relatively weak after removing an item; additionally, it's incompatible with Rock Blast, which will leave Mega Heracross more open to Flying- and Fairy-types. Bullet Seed is an option worth considering, as it allows Mega Heracross to handle Azumarill, Rotom-W, Hippowdon, and Quagsire much more effectively; however, it has little use elsewhere. An Adamant nature can be used to better handle Clefable, Skarmory, Hippowdon, and Mandibuzz, but this should only be used if your team doesn't already have a way to deal with them. Assault Vest Heracross with a set of Close Combat / Megahorn / Stone Edge / Knock Off with Guts can function as a great check to Keldeo, Slowbro, and Will-O-Wisp users. However, the lack of power without Mega Evolving or a Guts boost isn't activated leaves a lot to be desired. Megahorn can be used over Pin Missile if you want to potentially abuse Guts more efficiently, but it has less accuracy, less PP, and would leave Rock Blast as the only move to break through Substitutes. Running a Flame Orb with Guts can allow Heracross to pull off a surprise wallbreaking set, but gets worn down very easily and requires more support than the other sets.
Checks & Counters
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**Azumarill**: Azumarill works as a good check, thanks to its bulk and typing letting it avoid an OHKO from any attack and being able to OHKO with Play Rough, but it must be wary of the rare Bullet Seed.
**Unaware Clefable**: If Mega Heracross isn't using an Adamant nature, Unaware Clefable can avoid a 2HKO from any attack and 2HKO with Moonblast.
**Offensive Flying-types**: Flying-types such as Talonflame, Staraptor, and Mega Pinsir are a real pain for Mega Heracross to face, as all of them are capable of outrunning and OHKOing Mega Heracross.
**Doublade**: Doublade avoids a 2HKO from all of Mega Heracross's moves, even the rare Earthquake, and can hurt it significantly with Gyro Ball, finish it off with Shadow Sneak, or cripple it with a Toxic.
**Will-O-Wisp**: After Mega Evolving, Mega Heracross is very vulnerable to burns. Pokemon such as Mew, Gengar, Mega Gardevoir, and Victini are capable of outrunning and burning it with Will-O-Wisp. However, Heracross does carry Guts often, so Will-O-Wisp should only be used after it Mega Evolves or after confirming that its ability isn't Guts, though the latter two may simply attack with the appropriate STAB attack to KO it.
**Acrobatics Gliscor**: Acrobatics Gliscor can switch into any attack thrown its way, outrun Mega Heracross with 200 Speed EVs and a neutral nature or 100 Speed EVs with a Jolly nature, and proceed to OHKO after ridding itself of its item.
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