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This guide will show you how to build some of the strongest Hydreigon Decks. We'll cover the best Hydreigon Deck builds, how to use them, as well how to beat Hydreigon Decks, and more!
| The decks on this page reflect the meta around the Ruler of the Skies Expansion. |
List of Contents
| Hydreigon Deck Variants | Strengths and Weaknesses |
|---|---|
Hoopa ex and Hydreigon Deck
[★ New ★] |
Strengths:
• Hoopa ex has a low-cost Shadow Bullet that can immediately apply offensive pressure for only one Energy. • Hydreigon's Roar in Unison allows it to set up an attack in a single turn. Weaknesses: • Besides Hydreigon, the deck may find it difficult to deal burst damage. • Hydreigon is a Stage 2, which requires some effort and resources to set up. |
Mega Absol ex and Hydreigon Deck
|
Strengths:
• Inexpensive Attack in Darkness Claw, which can 2HKO most ex Pokemon. • Darkness Claw can be disruptive if it can discard a Supporter card from your opponent's hand. • Hydreigon's massive damage output can make up for Mega Absol ex's relatively low attack power. Weaknesses: • Mega Absol ex has low HP compared to other Mega ex Pokemon. |
Hydreigon Deck
|
Strengths:
• Can set itself up to Attack with its Roar in Unison Ability. • Can attack on consecutive turns, despite Hyper Ray's discard condition. Weaknesses: • Roar in Unison puts damage on Hydreigon, making it easier to KO. • Hydreigon is a Stage 2, which requires some effort and resources to set up. |
Mega Absol ex and Nihilego Deck
|
Strengths:
• Poison Barb and Nihilego's More Poison Ability can deal additional damage to the opponent's Active Pokemon. • This deck focuses on disruption using Mega Absol ex's Darkness Claw. Weaknesses: • Mega Absol ex has low HP compared to other Mega ex Pokemon. • This deck has no recovery options. |
Tauros ex and Hydreigon Deck
|
Strengths:
• Tauros ex can dominate in the early game, since it's very easy to set up. • Hydreigon can make up for Tauros ex's middling damage output in the late game. Weaknesses: • Tauros ex and Hydreigon can both damage themselves. • Hydreigon can make up for Tauros ex's middling damage output in the late game. |
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| Energy Used |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Hoopa ex can naturally be played in a deck with Hydreigon because both are Dark-types. Hydreigon can also help with Hoopa ex's weakness of being unable to deal burst damage by itself.
Deceptive Needle is a handy new Pokemon Tool that deals 10 damage to the opponent's Active Pokemon at the end of your turn. Attaching this to Hoopa ex lets you add more damage to the board.
| Expansions | Cards to Get and Packs to Open |
|---|---|
| Genetic Apex (A1) | No cards needed from this expansion. |
| Mythical Island (A1a) | No cards needed from this expansion. |
| Spacetime Smackdown (A2) | Giant Cape x 1 (Dialga Pack) |
| Triumphant Light (A2a) | No cards needed from this expansion. |
| Shining Revelry (A2b) | No cards needed from this expansion. |
| Celestial Guardians | Rare Candy x 2 (Any Pack) |
| Extradimensional Crisis | No cards needed from this expansion. |
| Eevee Grove | No cards needed from this expansion. |
| Wisdom of Sky and Sea | No cards needed from this expansion. |
| Secluded Springs | No cards needed from this expansion. |
| Mega Rising | Deino x 2 (Mega Gyarados Pack) Hydreigon x 2 (Mega Gyarados Pack) Copycat x 2 (Mega Gyarados Pack) |
| Crimson Blaze | No cards needed from this expansion. |
| Fantastical Parade | Lucky Ice Pop x 1 (Mega Gardevoir Pack) |
| Paldean Wonders | No cards needed from this expansion. |
| Mega Shine | No cards needed from this expansion. |
| Pulsing Aura | Bombirdier x 1 (Mega Lucario Pack) Field Blower x 1 (Mega Lucario Pack) |
| Paradox Drive | No cards needed from this expansion. |
| Everyday Wonders | No cards needed from this expansion. |
| Ruler of the Skies | Hoopa ex x 2 (Mega Rayquaza Pack) Deceptive Needle x 2 (Mega Rayquaza Pack) |
| Team Rocket's Ambition | No cards needed from this expansion. |
| Promo-A | Poke Ball x 2 (Promo-A Pack) Professor's Research x 2 (Promo-A Pack) |
| Promo-B | No cards needed from this expansion. |
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| Energy Used |
Scan Code Save image to scan in-game. |
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Although Mega Absol ex's Darkness Claw has a great disruptive effect, it lacks the power you may want in the late game. Hydreigon is here to make up for Mega Absol ex's damage output. Switch it in if you need to deal with high HP Pokemon or if you need to go up against Pom-Pom Oricorio.
A copy of Lucky Ice Pop are slotted in to mitigate Hydreigon's damage from Roar in Unison.
| Expansions | Cards to Get and Packs to Open |
|---|---|
| Genetic Apex (A1) | No cards needed from this expansion. |
| Mythical Island (A1a) | No cards needed from this expansion. |
| Spacetime Smackdown (A2) | Cyrus x 1 (Palkia Pack) |
| Triumphant Light (A2a) | No cards needed from this expansion. |
| Shining Revelry (A2b) | Pokemon Center Lady x 1 (Shiny Charizard Pack) |
| Celestial Guardians | Rare Candy x 2 (Any Pack) |
| Extradimensional Crisis | No cards needed from this expansion. |
| Eevee Grove | No cards needed from this expansion. |
| Wisdom of Sky and Sea | No cards needed from this expansion. |
| Secluded Springs | No cards needed from this expansion. |
| Mega Rising | Mega Absol ex x 1 (Mega Gyarados Pack) Deino x 2 (Mega Gyarados Pack) Hydreigon x 2 (Mega Gyarados Pack) Copycat x 2 (Mega Gyarados Pack) |
| Crimson Blaze | No cards needed from this expansion. |
| Fantastical Parade | Lucky Ice Pop x 1 (Mega Gardevoir Pack) |
| Paldean Wonders | No cards needed from this expansion. |
| Mega Shine | No cards needed from this expansion. |
| Pulsing Aura | Bombirdier x 1 (Mega Lucario Pack) Field Blower x 1 (Mega Lucario Pack) |
| Paradox Drive | No cards needed from this expansion. |
| Everyday Wonders | No cards needed from this expansion. |
| Ruler of the Skies | Deceptive Needle x 2 (Mega Rayquaza Pack) |
| Team Rocket's Ambition | No cards needed from this expansion. |
| Promo-A | Poke Ball x 2 (Promo-A Pack) Professor's Research x 2 (Promo-A Pack) |
| Promo-B | No cards needed from this expansion. |
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| Energy Used |
Scan Code Save image to scan in-game. |
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Hydreigon boasts a number of powerful attributes. being a non-ex, single-point Pokemon that can deal high damage and accelerate Energy onto itself.
Being a Stage 2, however comes with the limitation of being difficult to set up and being reliant on multiple turns and finding Rare Candy.
This deck also runs non-ex Absol, whose Leap Over Attack can outright KO Mantyke and Magikarp.
| Expansions | Cards to Get and Packs to Open |
|---|---|
| Genetic Apex (A1) | Sabrina x 1 (Charizard Pack) |
| Mythical Island (A1a) | No cards needed from this expansion. |
| Spacetime Smackdown (A2) | Giant Cape x 1 (Dialga Pack) Cyrus x 1 (Palkia Pack) |
| Triumphant Light (A2a) | No cards needed from this expansion. |
| Shining Revelry (A2b) | Red x 1 (Shiny Charizard Pack) |
| Celestial Guardians | Rare Candy x 2 (Any Pack) Lillie x 1 (Solgaleo Pack) |
| Extradimensional Crisis | No cards needed from this expansion. |
| Eevee Grove | No cards needed from this expansion. |
| Wisdom of Sky and Sea | Absol x 2 (Any Pack) |
| Secluded Springs | No cards needed from this expansion. |
| Mega Rising | Deino x 2 (Mega Gyarados Pack) Zweilous x 1 (Mega Gyarados Pack) Hydreigon x 2 (Mega Gyarados Pack) May x 1 (Mega Blaziken Pack) |
| Crimson Blaze | No cards needed from this expansion. |
| Fantastical Parade | No cards needed from this expansion. |
| Paldean Wonders | No cards needed from this expansion. |
| Mega Shine | No cards needed from this expansion. |
| Pulsing Aura | No cards needed from this expansion. |
| Paradox Drive | No cards needed from this expansion. |
| Everyday Wonders | No cards needed from this expansion. |
| Ruler of the Skies | No cards needed from this expansion. |
| Team Rocket's Ambition | No cards needed from this expansion. |
| Promo-A | Poke Ball x 2 (Promo-A Pack) Red Card x 1 (Promo-A Pack) Professor's Research x 2 (Promo-A Pack) |
| Promo-B | No cards needed from this expansion. |
| Alternate Cards | Possible Cuts |
|---|---|
![]() Mars (A2 155) |
![]() ![]() ・You can slot in Mars instead of Red Card if you prefer. |
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| Energy Used |
Scan Code Save image to scan in-game. |
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This deck allows you to inflict Poison on your opponent in order to make up for Mega Absol ex's relatively low damage output. You can attach Poison Barb to Mega Absol ex in the Active Spot, then have Nihilego on your Bench to increase the Poison damage every turn.
Since you can use Mega Absol ex's Darkness Claw to get rid of some of your opponent's recovery options, this is a good way to deal damage over time. However, if you're in need of a large amount of damage in one move, you can attack with Hydreigon.
| Expansions | Cards to Get and Packs to Open |
|---|---|
| Genetic Apex (A1) | No cards needed from this expansion. |
| Mythical Island (A1a) | No cards needed from this expansion. |
| Spacetime Smackdown (A2) | Cyrus x 1 (Palkia Pack) |
| Triumphant Light (A2a) | No cards needed from this expansion. |
| Shining Revelry (A2b) | No cards needed from this expansion. |
| Celestial Guardians | Rare Candy x 2 (Any Pack) Poison Barb x 2 (Lunala Pack) |
| Extradimensional Crisis | Nihilego x 2 (Buzzwole Pack) |
| Eevee Grove | No cards needed from this expansion. |
| Wisdom of Sky and Sea | No cards needed from this expansion. |
| Secluded Springs | No cards needed from this expansion. |
| Mega Rising | Mega Absol ex x 2 (Mega Gyarados Pack) Deino x 2 (Mega Gyarados Pack) Hydreigon x 2 (Mega Gyarados Pack) May x 1 (Mega Blaziken Pack) |
| Crimson Blaze | No cards needed from this expansion. |
| Fantastical Parade | No cards needed from this expansion. |
| Paldean Wonders | No cards needed from this expansion. |
| Mega Shine | No cards needed from this expansion. |
| Pulsing Aura | No cards needed from this expansion. |
| Paradox Drive | No cards needed from this expansion. |
| Everyday Wonders | No cards needed from this expansion. |
| Ruler of the Skies | No cards needed from this expansion. |
| Team Rocket's Ambition | No cards needed from this expansion. |
| Promo-A | Poke Ball x 2 (Promo-A Pack) Red Card x 2 (Promo-A Pack) Professor's Research x 2 (Promo-A Pack) |
| Promo-B | No cards needed from this expansion. |
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| Energy Used |
Scan Code Save image to scan in-game. |
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It's ideal to have Tauros ex in your Active Spot as soon as possible in order to quickly knock out your opponent's Pokemon before they can set up. Darkrai ex is best used to support it from the Bench, and Hydreigon can be set up on the Bench to come in and clean up in the late game.
Once Tauros ex is all set up, it's best to attach your Energy onto Darkrai, and use Hydreigon's Ability to generate Energy for itself. However, this can make it vulnerable to being switched into the Active Spot with an opposing Cyrus, so it's recommended to only use its Ability when you're ready to swap it in yourself.
To prevent your Tauros ex from inflicting damage on itself, you can use Will to make sure the coin flip is in your favor.
| Expansions | Cards to Get and Packs to Open |
|---|---|
| Genetic Apex (A1) | Sabrina x 1 (Charizard Pack) |
| Mythical Island (A1a) | No cards needed from this expansion. |
| Spacetime Smackdown (A2) | Darkrai ex x 1 (Dialga Pack) Cyrus x 1 (Palkia Pack) Mars x 1 (Palkia Pack) |
| Triumphant Light (A2a) | No cards needed from this expansion. |
| Shining Revelry (A2b) | No cards needed from this expansion. |
| Celestial Guardians | Rare Candy x 2 (Any Pack) |
| Extradimensional Crisis | No cards needed from this expansion. |
| Eevee Grove | No cards needed from this expansion. |
| Wisdom of Sky and Sea | Will x 2 (Lugia Pack) |
| Secluded Springs | No cards needed from this expansion. |
| Mega Rising | Deino x 2 (Mega Gyarados Pack) Zweilous x 1 (Mega Gyarados Pack) Hydreigon x 2 (Mega Gyarados Pack) Tauros ex x 2 (Mega Altaria Pack) May x 1 (Mega Blaziken Pack) |
| Crimson Blaze | No cards needed from this expansion. |
| Fantastical Parade | No cards needed from this expansion. |
| Paldean Wonders | No cards needed from this expansion. |
| Mega Shine | No cards needed from this expansion. |
| Pulsing Aura | No cards needed from this expansion. |
| Paradox Drive | No cards needed from this expansion. |
| Everyday Wonders | No cards needed from this expansion. |
| Ruler of the Skies | No cards needed from this expansion. |
| Team Rocket's Ambition | No cards needed from this expansion. |
| Promo-A | Poke Ball x 2 (Promo-A Pack) Professor's Research x 2 (Promo-A Pack) |
| Promo-B | No cards needed from this expansion. |
| Alternate Cards | Possible Cuts |
|---|---|
![]() Rocky Helmet (A2 148) |
![]() ![]() ・You can swap Will with a Rocky Helmet if you're willing to trade potential chip damage on Tauros ex for more damage onto the opponent. |

Hydreigon can accelerate Energy onto itself with Roar in Unison. Once set up, it can use Hyper Ray to deal a massive 130 damage, with the minor downside of discarding Energy, which it can get back the following turn.

Cleffa can search for Pokemon with Twinkly Call, increasing the deck's consistency. This becomes even more effective after you have used your Poke Balls, because it ensures that you will only find evolution cards with Twinkly Call.
Because evolving into Hydreigon is the deck's core strategy, Cleffa's setup is a valuable tool in the deck's arsenal.


Non-ex Absol is a great option against low-HP Pokemon, particularly Mantyke and Magikarp. The option to KO these two Pokemon make the Absol a worthy inclusion to the deck.

Hydreigon with Mega Absol ex is also a strong combination. Mega Absol ex can discard your opponent's Supporter cards, severely limiting their options and disrupting their setup. Simply retreat Mega Absol ex into Hydreigon and score a KO to take your remaining points.
Best Mega Absol ex Decks and Card List


Because Hydreigon's Roar in Unison causes it to damage itself, it becomes easier to KO. Attack an Active Hydreigon for KO or gust out a damaged one from the Bench using Cyrus.

TR Articuno ex |
TR Zapdos ex |
TR Weezing ex |
TR Slowking ex |
TR Raticate ex |
TRA Garchomp |
TR Moltres ex |
TR Wobbuffet |
Mega Garchomp ex |
- | - | - |
Best Hydreigon Decks and Card List

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