Dragonite

The Speed EVs enable Dragonite to outspeed positive-natured Tyranitar, as well as defensive Zapdos and Celebi, while the Attack investment lets it OHKO Calm Blissey with Superpower. Maximum Special Attack and a positive nature grants it maximum wallbreaking power, but a Lonely nature can be used to give ExtremeSpeed an extra kick. If running a Lonely nature, consider using 108 Attack EVs to OHKO Bold Blissey with Superpower after Stealth Rock damage. A Hasty nature can let Dragonite outrun neutral-natured Gyarados and positive-natured Heatran, but this Dragonite is primarily a stallbreaker, and the loss in power is rarely worth it. A Quiet nature and a spread of 252 HP / 56 Atk / 196 SpA / 4 Spe sacrifices Dragonite's ability to outrun positive-natured Tyranitar and certain defensive Pokemon, but gives greater overall bulk, and is thus useful if running Roost. Specifically, it can survive a Adamant Lucario's +2 Close Combat after Stealth Rock on average. Fire Blast is a good alternative to Flamethrower as it secures several important KOs, such as the OHKO on specially defensive Skarmory, defensive Celebi, and Metagross, although the accuracy can be a let-down. Thunderbolt is also a usable option as it 2HKOes standard Suicune, who is a common switch-in to Dragonite, while still 2HKOing most Steel-types.

Due to Dragonite's huge vulnerability to priority attacks, such as Scizor's Bullet Punch and Weavile's Ice Shard, a bulky Steel-type is a valuable partner; Heatran in particular also attracts Ground-type attacks for Dragonite to switch into. Additionally, this set can potentially lure in Skarmory and Forretress, which Heatran can deal with. Scizor is a useful partner too, as it can scout the opposing team with U-turn to ease prediction. Furthermore, it greatly appreciates the removal of Forretress and Skarmory, and can take down Flygon and Cresselia, who can cause major problems for Dragonite. Considering Dragonite's mediocre Speed, paralysis support from the likes of Jirachi and Celebi can give it a much easier time sweeping. The former has perfect type synergy with Dragonite, while the latter—despite also being weak to Ice—can defeat the bulky Water-types that trouble Dragonite. Finally, Dragonite appreciates entry hazards support. Stealth Rock is practically necessary for all Dragonite, but this Dragonite loves Spikes support as well, because it improves Dragonite's chances to OHKO Hippowdon, Swampert, and even Vaporeon with Draco Meteor. Forretress has surprisingly nice defensive synergy with Dragonite, and can remove Stealth Rock with Rapid Spin in between setting up Spikes.

With the given EVs and an Adamant nature, Dragonite reaches 604 Attack and 388 Speed after a boost, which let it hit hard while outspeeding all unboosted base 125 Speed Pokemon and below. If forgoing ExtremeSpeed for Fire Punch, Jolly is the superior nature to get the jump on base 130 Speed Pokemon. This has consequences, however; without ExtremeSpeed, Dragonite is easily revenge killed by Choice Scarf users such as Flygon.

As Skarmory and Bronzong completely wall Dragonite that lack Fire Punch, Magnezone is arguably Dragonite's best partner. Its ability to trap and remove opposing Steel-types allows Dragonite to freely use Outrage; furthermore, it sponges Ice-, Rock-, and Dragon-type moves for Dragonite while luring Fire- and Ground-type attacks for Dragonite to switch into. Heatran too can keep its fellow Steel-types in check and fares better against Mamoswine and Weavile, who can revenge kill Dragonite with Ice Shard. On the other hand, if Dragonite lacks ExtremeSpeed, its teammates must have a way to deal with Choice Scarf Flygon, while Cresselia poses a threat to all Dragonite. Scizor can 2HKO Flygon with Bullet Punch and severely damage Cresselia with U-turn. Rapid Spin support is heavily recommended for this Dragonite as it lacks Roost. Starmie and Tentacruel are good spinners due to their respectable bulk, resistance to Ice, and good offenses. Tentacruel can also set up Toxic Spikes to severely cripple defensive Suicune, which can survive a boosted Outrage and OHKO back with Ice Beam.

The given EVs grant Dragonite enough bulk to set up multiple Dragon Dance boosts, and enough Speed to outrun base 120s at +1; the rest are dumped into Attack so it hits a little harder. Leftovers is the recommended item; while a Life Orb offers much more power, it somewhat contradicts the bulky nature of the set. An EV spread of 216 HP / 80 Atk / 212 Spe is recommended if using a Life Orb as it allows +1 Dragonite to OHKO Metagross with Earthquake after Stealth Rock. If you're not concerned about base 120 Speed Pokemon, namely Dugtrio and Alakazam, feel free to drop down to 224 HP EVs and 204 Speed EVs, which achieves a good Life Orb number while still beating base 115 Speed Pokemon. Brick Break gives Dragonite a way to hit both Heatran and the levitating Steel-types, but as most Steel-types have a secondary typing that renders them neutral to Fighting, it is more often than not a rather weak attack to complement Dragonite's STAB.

While this set is bulky enough to set up on many opponents, it is both easily walled and revenge killed. Without Fire Punch, Skarmory and Bronzong will have no trouble handling Dragonite, and without Earthquake, Heatran will defeat the set. For this reason, having a Magnezone on your team is crucial. Additionally, Magnezone can switch in on Flygon as it uses Outrage, as well as Heatran as it tries to revenge kill Dragonite with Hidden Power Ice or Dragon Pulse, and take both down with Hidden Power Ice. Good prediction is needed, however, as both of these Pokemon can easily beat Magnezone with the appropriate move. A Heatran of your own is also a useful partner as it can keep Bronzong and Skarmory in check with its STAB Fire Blast. A spinner such as Starmie or Tentacruel is recommended too, especially if Dragonite opts for a Life Orb, as Stealth Rock can make it difficult for Dragonite to set up.

The given EVs are simple and straightforward and ensure that Dragonite hits like a truck while staying ahead of Scizor and Tyranitar. A Jolly nature may be used to outspeed Adamant Gyarados, Adamant Lucario, and Heatran lacking a Choice Scarf, although the loss in power is substantial and stops Dragonite from beating some of its common switch-ins like Suicune. There are a few viable moves for the last slot; Dragon Claw is generally the best choice for a reliable STAB, but Superpower may be used as a way of hitting Heatran if you are running Fire Punch. Earthquake and Fire Punch may be used together to achieve perfect coverage, although the loss of a reliable STAB just to hit one or two Pokemon that can be easily handled by teammates is often not worth it. Finally, Waterfall may also be used in the last slot as it offers great neutral coverage, eases prediction, and can 2HKO Hippowdon and Gliscor without locking Dragonite into Outrage.

Since Dragonite can 2HKO every Pokemon in the OU tier, its only true concern is being revenge killed. Scizor, Jirachi, and Flygon can all come in and revenge kill Dragonite with impunity, especially if it locks itself into Outrage. For this reason, Magnezone once again makes a good partner, as it can trap the former two and possibly catch Flygon with Hidden Power Ice. Hippowdon or Skarmory can also be used to deal with these Pokemon on a more balanced team. Starmie is another useful partner to have around, as it can provide Rapid Spin support while simultaneously handling some of the Pokemon that threaten Dragonite. Finally, Heatran can keep Scizor and Jirachi in check and greatly appreciates the removal of bulky Water-types that Dragonite may lure and 2HKO with Outrage.

Life Orb is the ideal item for this set, as its power boost helps compensate for the lack of an Attack boost. 204 Speed EVs let Dragonite outspeed base 100 Choice Scarf users after an Agility boost, 52 Special Attack EVs allow Dragonite to 2HKO offensive Rotom-A with Fire Blast after Stealth Rock, and maximum Attack investment enables it to sweep. Some EVs can be moved from Attack to Special Attack if you feel it's necessary to boost the power of Fire Blast or Thunderbolt. Naughty is the recommended nature as it increases Dragonite's Attack without lowering its Special Attack, but an Adamant nature can be used if you want more bulk. However, note that hindering-natured Dragonite loses the ability to 2HKO offensive Rotom-A with Fire Blast. If you are worried about the reliability of Outrage and Fire Blast, Dragon Claw and Flamethrower can be used in their place, but the loss of power will make a sweep difficult. Focus Blast is viable for power and good neutral coverage, but keep in mind that its accuracy is terrible.

As Dragonite is a good lure of Choice Scarf revenge killers such as Flygon and Jirachi, Pokemon that appreciate their removal, such as Heatran, Gyarados, and Tyranitar, are the most effective partners for this set. Magnezone support is heavily recommended, especially if opting for Outrage over Dragon Claw, as Steel-types would have a field day switching in on Outrage and beating Dragonite down. A teammate that can deal with bulky Water-types and Hippowdon is also recommended. Grass-types such as Shaymin and Celebi can easily dispose of both with their STAB attacks, but they share an unfortunate weakness to Ice-type attacks with Dragonite. Toxic Spikes are an alternative method of dealing with them. Tentacruel can set up Toxic Spikes and provide Rapid Spin support while offering a crucial resistance to Ice. Finally, Starmie can also provide Rapid Spin support and beat bulky Water-types that lack Hidden Power Electric by alternating between Thunderbolt and Recover.

The heavy Special Defense investment allows Dragonite to set up on defensive Pokemon such as Blissey and Cresselia, even if they carry Ice Beam, while the Speed investment allows Dragonite to outspeed positive-natured Lucario and neutral-natured base 100s after a Dragon Dance. The Special Defense EVs can be shifted into Defense to give Dragonite a good chance to survive standard Choice Scarf Flygon's Outrage even after Stealth Rock damage, but this will leave Dragonite vulnerable to many defensive Pokemon it could otherwise set up on. Due to the lack of Attack investment, Outrage can be used over Dragon Claw; it is much more powerful, and the confusion can be removed with Heal Bell. However, Dragon Claw is the more reliable option as a Dragonite locked into Outrage will be unable to Roost or switch out, and will thus be easy pickings for revenge killers.

As this Dragonite is completely walled by Steel-types, Magnezone support is required if you want Dragonite to be able to sweep. Paralysis support is also beneficial, as Dragonite is outsped by numerous Pokemon even after a Dragon Dance. Discharge Magnezone and Jirachi can both spread paralysis effectively; the latter can also beat Steel-types down with either Thunderbolt or Fire Punch. Dragonite can set up on defensive Water-types, but offensive variants can beat it, so one should have a way to deal with them. Magnezone's STAB Electric-type attacks will help in this area, but it is outsped and can be worn down by neutral Water-type attacks, so an additional check, such as Roserade, Celebi, or Shaymin, is recommended. Roserade is particularly valuable here as it can set up either Spikes or Toxic Spikes and incapacitate a foe with its status moves. Tentacruel can also cripple bulky Water-types with Toxic Spikes while providing Rapid Spin support. Flygon outspeeds even +1 Dragonite, so a bulky Water-type or a Steel-type of your own that can switch in on Flygon's Outrage and take it down is recommended.