[OVERVIEW]

Dragon
========

* Hydreigon is a great special attacker for Dragon teams capable of blowing past both offensive and bulkier teams.
* It can utilize various items ranging from Choice Scarf to Life Orb to deal with whichever team archetypes the team faces trouble with. A set using Choice Scarf is great versus offensive teams while balance team archetypes crumble to Life Orb Hydreigon.
* It's typing and ability Levitate gives it a free switch to Psychic, Ghost and Ground type-moves. This is especially useful in Dragon teams as it preserves the health of other members as most Dragon-type Pokemons do not have recovery.
* It's ability also gives it a nifty immunity to Spikes, Toxic Spikes and Sticky Web.
* Hydreigon has an extensive movepool with good coverage options such as Fire Blast, U-turn, Flash Cannon, Taunt, and Roost.
* It has good bulk for an offensive Pokemon thus letting it switch in on resisted hits.
* Dark is a good offensive typing, especially in tandem with Hydreigon's great Special Attack. However, it has a hard time beating Fairy-types, since they resist Dark.
* Hydreigon has an unfortunate 4X weakness to the common Fairy-types and weakness to common Fighting and Bug-types.
* It usually suffers from four-moveslot syndrome, which means it will always be walled by threats depending on what coverage it chooses to run.
* It has good Speed but is outsped by common Choice Scarf users such as Terrakion, Keldeo, Latios and faster foes like Mega Charizard X, Mega Charizard Y, Mew etc.

[SET]
name: Wallbreaker (Dragon)
move 1: Dark Pulse
move 2: Draco Meteor
move 3: Fire Blast
move 4: Earth Power
item: Choice Specs / Life Orb
ability: Levitate
nature: Timid
evs: 252 SpA / 4 SpD / 252 Spe

[SET COMMENTS]
Moves
========

* Dark Pulse is an easily spammable move which has no drawbacks.
* Draco Meteor deals insane damage even to resisted hits and is Hydreigon's strongest option, but has the recoil of lowering Hydreigon's Special Attack by two stages.
* Fire Blast hits opposing Steel and Bug types super effectively. It OHKOes the likes of Scizor, Ferrothorn, Heracross etc.
* Earth Power breaks Steel-types along with Fire Blast, and has great coverage, OHKOing Electric-types such as Tapu Koko and Xurkitree.

Set Details
========

* Maximum investment in Speed with a Timid nature lets it outspeed base 95 Speed Pokemons such as Mimikyu, Kyurem-B, Mega Garchomp etc.
* Maximum investment in Special Attack allows Hydreigon to hit as hard as possible.
* Choice Specs allows Hydreigon to OHKO Magearna with Fire Blast and Azumarill after a Z-Belly Drum with Earth Power.
* Life Orb lets Hydreigon have an easier time breaking Steel-types, but the recoil reduces its longevity.
* Levitate is the only ability Hydreigon has, but is useful as it allows it to switch into Ground-type moves.

Usage Tips
========

* This set functions as an early-game wallbreaker for heavily denting the opposition through powerful attacks which another teammate can utilize.
* Dark Pulse is an easily spammable move which has little drawbacks.
* Don't fear to use Draco Meteor. It's raw power is almost always worth it. That being said, be careful if the opponent has a Fairy type such as Tapu Fini on Water teams and Togekiss on Flying as Dragon teams have no switch in to them. The Special Attack drop is quite detrimental at times.
* Use Hydreigon's typing and ability to switch in Psychic and Ground-type attacks.
* Hydreigon has relatively good bulk, so it can easily switch in on resisted hits.
* Try to use the coverage moves on the switch, as this Hydreigon set does not have the freedom to switch moves.
* Be careful when choosing what to lock yourself into. Locking yourself in Draco Meteor, for example, will allow Steel- and Fairy-type Pokemon to set up freely or will deal a large amount of damage to whatever you choose to switch into, causing a large loss of momentum.
* If using Life Orb, avoid switching Hydreigon into attacks, as it cannot afford to take much chip damage in combination of Life Orb recoil.

Team Options
========

* Garchomp provides Stealth Rock for Hydreigon which helps it accomplish some crucial KOes such as the OHKO on Physically Defensive Celesteela, Specially Defensive Skarmory, and Mandibuzz and the 2HKO on Toxapex. Garchomp is also a secondary Mimikyu check, as it can outspeed it and revenge kill it easily, relieving pressure off of Hydreigon.
* Strong Wallbreakers like Choice Band Dragonite can work together to bring down opposing special walls such as Chansey that Hydreigon struggles to get past.
* Late-game sweepers and cleaners appreciate Hydreigon leaving holes in the opposing team so that they may clean afterwards. Z-move Salamence is a good example as it can easily sweep after Hydreigon has softened up the opposition. Choice Scarf Latios is a good late-game cleaner which can come in after Hydreigon has weakened the opposition.
* Dragalge is a great teammate to deal with Fairy types while also providing Toxic Spikes which further increases Hydreigon's wallbreaking potential.
* Latias is a good teammate as it can provide hazard removal with Defog, take care of Fighting-types or provide Tailwind to make Hydreigon more threatening.
* Kyurem-B is a great mixed wallbreaker which can help Hydreigon deal with the few Specially Defensive walls it has trouble with.

[SET]
name: Choice Scarf (Dragon)
move 1: Dark Pulse
move 2: Draco Meteor
move 3: Fire Blast
move 4: U-turn
item: Choice Scarf
ability: Levitate
nature: Timid
evs: 252 SpA / 4 SpD / 252 Spe

[SET COMMENTS]
Moves
========

* Dark Pulse is stab, and is the move Hydreigon will use the most. It also has a nifty 20% chance to flinch the target.
* Draco Meteor is a strong nuke, capable of dealing tons of damage to non resistant foes but has the drawback of reducing Hydreigon's Special Attack by two stages.
* Fire Blast deals super effective damage to Bug- and Steel-types such as Heracross, Klefki, Excadrill, and Celesteela, while OHKOing Mega Scizor and Ferrothorn, and 2HKOes non Assault Vest variants of Magearna.
* U-turn brings momentum to the team.

Set Details
========

* Maximum investment in Special Attack allows Hydreigon to hit as hard as possible.
* Maximum investment in Speed with a Timid nature and Choice Scarf allows it to outspeed the majority of the metagame such as Scolipede, Choice Scarf Excadrill, and Cloyster at +2.
* Levitate is the only ability Hydreigon has, but it is useful for switching into Ground-type moves.

Usage Tips
========

* This set functions as a late-game cleaner when all of it's checks and counters have been sufficiently weakened.
* It also performs as a great revenge killer.
* Don't be intimidated to use U-turn, as a U-turn on a predicted switch to Chansey, Toxapex or Tyranitar will bring tons of momentum to the team.
* Use Hydreigons typing and ability to get a free switch in to Psychic and Ground-type attacks.
* Try to keep hazards on the opponent's side, as it will let Hydreigon achieve some crucial OHKOes, such as against Excadrill, Heracross, and Landorus.
* Hydreigon can also function as a good lead, as it can bring momentum with U-turn for its teammates.
* Be careful while using Draco Meteor, since Hydreigon can be setup bait due to the drop in Special Attack.
* Be careful to not take too much damage while switching in, as it can be difficult to clean late-game.

Team Options
========

* Hydreigon appreciates entry hazard support to ensure some OHKOes and 2HKOes. Garchomp can provide Stealth Rock while Dragalge provides Toxic Spikes.
* Strong Wallbreakers are appreciated to softening the opposition before cleaning with it. Choice Band Dragonite and Kyurem-B are notable. They also deal with Specially defensive walls which Hydreigon struggles to get past.
* Latios is capable of dealing with the Fighting types such as Keldeo which Hydreigon is weak to. Choice Scarf Latios also helps against opposing Dragon teams and pressures Choice Scarf Nihilego. Latias is also a good teammate as it can give hazard removal with Defog which helps Hydreigon a lot as it will be pivoting in and out.
* Hydreigon appreciates setup sweepers to weaken the opposing team before Hydreigon can clean. Dragon Dance Salamence is thus a great teammate.
* Dragalge is a great partner for Hydreigon as it somewhat mitigates Hydreigon's 4X weakness against Fairy types.


[STRATEGY COMMENTS]
Other Options
=============

Dragon
--------
* A stallbreaker set with Dark Pulse, Fire Blast, Roost, and Taunt could be used to deal with stall teams, but it still can't break through Porygon2, and is useless against Fairy and offense.
* Flash Cannon could be used to hit Fairy-type super effectively, but many of them are neutral to it and Hydreigon thus loses a more important coverage.

Checks and Counters
===================

Dragon
--------
**Chansey**: Chansey is the perfect counter to Hydreigon, as Hydreigon can't do anything to it due to its stellar Special bulk.

**Fairy-types**: Fairy-type Pokemons can capitalize on Hydreigon's 4X weakness to Fairy-type moves, but they do have to watch out for Flash Cannon. Azumarill and Tapu Fini stand out as Hydreigon can do little damage to them.

**Fighting-types**: Fighting-types can come in on a Choice locked Hydreigon. However, they get heavily damaged by Draco Meteor. Choice Scarf Terrakion can outspeed it and OHKO it with Close Combat.

**Bug-types**: Bug-types force Hydreigon out with their super effective stabs. They do have to watch out for Fire Blast though. Araquanid can easily take any of it's move and recover through Leech Life.

**Revenge Killers**: Hydreigon can be revenge killed by faster threats like Mega Alakazam, Greninja, Garchomp, Mega Charizard-X and other Choice Scarf users such as Kyurem-B, although they cannot switch in on Hydreigon. Hydreigon is also weak to common forms of priority such as Mach Punch from Breloom , Ice Shard from Mamoswine etc. Hydreigon is not weak to Extreme Speed, but Extreme Speed from Choice Band Dragonite can KO it with some prior damage.