Best Pokemon TCG Pocket Mega Altaria ex Decks and Card List

Last updated on September 8th, 2026 at 10:43 am

The “Mega Harmony” attack of Mega Altaria ex is 40 damage +30 for each Pokemon on your Bench (to a maximum of 130 damage with 3 Pokemon on your Bench) for only 2 Energy. This efficiency is exactly why it has always been a Tier 1 deck in the current meta and has made up roughly 11.5% of tracked decks since late July 2026.

The strongest build on the former wields Mega Altaria ex packed into Darkrai, Igglybuff, and Espeon. The trio all put the foe’s Active to Sleep, giving turns to Mega Altaria ex to deck out its Bench before it can hit, and Darkrai’s Bad Dreams can chip in, subtracting free damage every sleeping turn.

Includes that build in its entirety, plus the Greninja/Gourgeist variants that appear in guide overviews and tournament sets, a detailed guide on playing it turn-by-turn, real strengths and weaknesses, and the lists built to counter it.

Best Mega Altaria ex Deck

Mega Altaria ex Deck List

That’s 11 Pokemon and 9 Trainers, 20 cards altogether. All of the Energy is from the Psychic Energy Zone, because Mega Altaria ex uses all Psychic-type attack costs, despite its Fairy type in the wider game.

Why This Is the Best Mega Altaria ex Deck

Main Win Condition

Get Mega Altaria ex’s Bench to 3 Pokemon, then clear the way so it hits for the full 130 damage—all other parts of the deck aid in maintaining that window.

Why Mega Altaria ex Is the Main Attacker

No other card in the deck can match its damage/Energy rate. Two Energy to deal up to 130 damage is very cost-effective, and knocking out an opposing ex or Mega is goal-counting good.

Why the Supporting Pokemon Are Included

Igglybuff gets Sleep from turn one without Energy. Espeon (Paradox Drive) can also get Sleep from turn one, if it is evolved, by discarding the requisite card. If it is, Darkrai’s Bad Dreams makes that Sleep into free damage, chipping away at your opponent every turn they are Asleep. Chingling’s Jingly Noise prevents your opponent from drawing Item cards, while your setup progresses.

How the Deck Creates Its Damage

It’s a layered stall. Sleep effects are used to deny the opponent turns; Darkrai then converts the denied turns into damage, and Mega Altaria ex completes the ex coverage once the Bench is full enough to be relevant.

What Makes This Build Different

Most Mega Altaria ex lists include one enabler. This one combines three distinct Sleep-induced moves so that just defeating one of them (a Sabrina flip, a Stage exception) doesn’t ruin the entire strategy.

Key Cards in the Deck

Mega Altaria ex is the finisher; everything else only gives you the turns you need. Espeon and Igglybuff are the Sleep engine. Professor’s Research, Copycat, and Lisia are what get you there reliably; Sabrina and Cyrus are what manipulate the board once you’re there.

How to Play the Mega Altaria ex Deck

How to Set Up the Deck

Open by searching for Swablu with a Poké Ball, and bring a Sleep user (Igglybuff or an evolved Espeon) onto the field as quickly as you can.

Early-Game Strategy

Keep damage to a minimum if possible. Landing Igglybuff’s Sleepy Lullaby late in the game isn’t as crucial as being able to land it early, since doing so allows you to accelerate your game plan that much more.

Mid-Game Strategy

When Sleep goes active, use the free turns to fill your Bench with Chingling, Darkrai, or a second Espeon. Each Benched Pokemon is 20 damage next turn for Mega Altaria ex.

Late-Game Strategy

Attack with Mega Altaria ex when you have three Pokémon in the bench. Use Cyrus first for an easy KO if the opponent has a damaged Pokemon that can come active with ease.

How to Build Your Bench

Set aside sequence low-priority pieces. Those two don’t have to attack, so bench them early, and hold the Espeon until you need Sleep.

How to Manage Energy

Once your bench is ready for a real attack, attach to Mega Altaria ex. Don’t spread the Energy around to multiple attackers because it relies on one big swing rather than a bunch of little swings.

When to Attack With Mega Altaria ex

Only when your Bench is 3, although on a non-table game where a slightly smaller hit will win the game.

When to Retreat

Retreat a sleeping or low-HP Attacker instead of letting it take a hit you can’t respond to, but only if you have a safe Bench piece to switch to.

How to Recover After Losing a Pokemon

Don’t try to make Mega Altaria ex give up too early to make up for it. First, restore a Sleep lock; that’s a remade attack anyway.

Common Mistakes to Avoid

The three most common mistakes are: Attacking before the Bench is full, applying Sleep effects without a plan to further them, and failing to recall the fact that Sabrina can thus turn the opponent’s Active Pokemon out of a bad situation.

Mega Altaria ex Turn-by-Turn Example

Turn 1: Use Swablu, Igglybuff if you have it. Distribute Energy on the strongest Pokemon.

Turn 2: Get the final missing piece using Poké Ball/Professor‘s Research. If Igglybuff is out, Sleep is always on.

Turn 3: You need your board to have an active Swablu (or evolving line toward Mega Altaria ex), one active Sleep source, and at minimum two other Bench Pokémon.

Mid-Game: This is the time to transition to Mega Altaria ex and have three Pokémon on the Bench. Play a Cyrus if there is a damaged Pokémon on the opponent’s board for an easy KO.

End Game: Hit for 130 damage with a powered-up full Bench, preferably trying for a KO on ex or Mega Pokémon since they get you bonus points.

Best Pokemon to Pair With Mega Altaria ex

Mega Altaria ex + Espeon

Espeon’s Paradox Drive can hit sleep right at turn 1 if already evolved, which is the quickest sleep trigger available in the deck. Strength-Speed Weakness-Depends on drawing Eevee in time to evolve.

Mega Altaria ex + Darkrai

Darkrai’s Bad Dreams makes each Sleep turn generate 20 free damage, so it combines rather than conflicts with Igglybuff or Espeon, instead of replacing them. Plus side: turns stall into actual damage. Downside: has no effect unless a source of sleep preexists.

Mega Altaria ex + Greninja

Another, separately recorded and documented variation. Water Shuriken chips damage everywhere, so Mega Altaria ex can clean up with a KO rather than requiring the full 130-damage swing every time. Pro: less reliant on a fully packed Bench. Con: slower to get there against decks that remove the Greninja.

Mega Altaria ex + Gourgeist

Gourgeist and Mega Altaria ex both safely KO everything that does not resist, so this feels harder to lock down entirely. The usual utility slots for this build are Jirachi and Chingling, used for sniping and disruption rather than as attackers. Strength is also a double-edged sword here – single-answer removal is hard to pull off, but this setup is slower than the Sleep-lock build.

Best Mega Altaria ex Deck Variations

Mega Altaria ex and Espeon Deck

The main build discussed above Igglybuff, Espeon, and Darkrai sleep-lock with Mega Altaria ex- is what you should use in this situation.

Mega Altaria ex and Greninja Deck

Swaps Sleep for a Froakie-to-Greninja line using Lisia to grab low-HP Basics and Chingling’s Jingly Noise to lock out the enemy Item cards as a new board forms.

Darkrai and Mega Altaria ex Deck

A slightly more disruptive variant of the primary build, which relies more on Darkrai’s Bad Dreams to do the bulk of the damage, instead of a partial reliance upon attacking with Mega Altaria ex.

Mega Altaria ex and Baby Pokemon Deck

Runs Chingling, Elekid, and Furfrou, all obtainable through Lisia, with Furfrou used as a tank to take hits from other Baby Pokémon or Trick & Ex Pokémon into the Mega Altaria ex.

Mega Altaria ex Deck Strengths

Potential for damage: 130 damage for 2 Energy is among the most damaging attacks in the format.
Consistency: It also includes Pokémon Ball, Professor’s Investigation, Copycat, and Lisia for five options of fetching the main plays.
Bench scaling: Damage scales with bench size, meaning a completed board is an immediate offense.
Flexibility: The Sleep-lock, Greninja, and Gourgeist checks allow you to pivot around what you’re playing into without giving up Mega Altaria ex as your primary reward.

Mega Altaria ex Deck Weaknesses

Slow Setup

Mega Altaria ex requires Swablu, time to evolve, and a mature Bench before it can do anything. Speedy decks that can punch through Sleep enablers and knock out Swablu early put you in the hole before you’re actually able to get underway.

Bench Vulnerability

Because damage scales with Bench size, anything that removes Benched Pokemon reduces your damage ceiling, rather than costing you a card.

Difficult Matchups

Decks based on Oricorio’s Safeguard Ability can be a real concern. Safeguard completely negates damage from ex Pokémon, meaning Mega Altaria ex is unable to attack at all despite the size of your Bench. Mega Blaziken ex is also a concern, since it is specifically designed to take out large, bulky Mega Pokemon in one hit.

How to Beat Mega Altaria ex Decks

Best Counters

Running any deck with Oricorio for its Safeguard Ability immediately clears Mega Altaria ex’s attack (unsafe for it to work), as Safeguard prevents damage from ex Pokémon. Mega Blaziken ex is, of course, another great backup counter as it was designed to KO Mega Pokémon in one hit before it gets to attack.

How to Disrupt the Bench

Target Benched Pokemon early. As Mega Altaria ex’s damage relies on the number of Benched Pokemon, take out even one before Mega Altaria ex to lower its maximum potential directly.

How to Stop the Setup

Put pressure on Swablu before it evolves; the deck lacks an attacker at the Swablu stage. By attacking early, you can cut off the time to set up Sleep effects and the Bench pieces it needs.

How to Win the Matchup

Race before the Bench. 3 Pokémon or run Oricorio to cap the ex damage regardless of how developed your opponent’s board is.

Best Trainer Cards for Mega Altaria ex

Best Draw cards: Professor’s Research and Copycat provide your hand from a wide spread, as you need a few different cards in your deck (Sleep source, 2-4 Baseroos, Mega Altaria ex card itself), though not one specific combo card.

Best Search Cards: Poké Ball gets Swablu, fetches to the bench; Lisia gets some low-HP Basics, changes to empty.

Best Switching Cards: Sabrina makes the defending Active Pokémon switch, which is great for distributing your setup or avoiding deadly attacks.

Best Disruption Cards: Cyrus. Bringing a KO-ready opposing Pokémon into the Active spot makes executing the KO that much easier than trying to take down whatever they’ve left active.

Mega Altaria ex Energy Requirements

Energy Type

Mega Altaria ex has a Psychic energy symbol when it is played, not a Fairy.

Energy Management

Attach to Mega Altaria ex once your Bench has enough to threaten a reasonable attack. The Mega Harmony is only 2 Energy, so there isn’t really any need to load up more than that in a turn.

When to Attach Energy

Hold Energy until you are a turn or two away from attacking — between the time you attach early with an underdeveloped Bench, and the time you attack, you lose the deck’s core strength.

Mega Altaria ex Deck Card Replacements

Cards To Substitute: You may swap Chingling for another Espeon if you are short on the Baby Pokemon.
Budget Replacements: (Standard Supporters can substitute for Copycat if you don’t have it, but at some expense to consistency.)
Different supporting Pokemon: Greninja can completely substitute the Darkrai/Igglybuff Sleep package if you would rather play the damage-spread variation.
Cards to Include: When you have enough of a full suite of cards, adding another Chingling (or potentially a second one, assuming you can find room) and/or a dedicated Oricorio tech (to handle the alternate Safeguard matchup) greatly increases consistency.

Mega Altaria ex Matchups

Mega Altaria ex vs Oricorio Decks

Safeguard takes out Mega Altaria ex’s damage altogether, so this matchup relies on whether you can KO your opponent before his Oricorio is online.

Mega Altaria ex vs Mega Blaziken ex

Blaziken is designed to one-shot tanky Megas. Keeping your Bench safe and not attacking too early is more important in this matchup than in any other.

Mega Altaria ex Mirror Match

Anyway, both teams are rushing for the same Sleep-lock option with the same tactic, so whoever gets that Igglybuff/Espeon put to sleep first generally sets the game’s tempo.

Is Mega Altaria ex Worth Building?

Suitable for: Existing or playable-with-effort Espeon, Darkrai, and basic drawing Supporters players who like a Sleep tempo game (actually a tempo game) rather than an aggressive game.
Who should avoid it: Players facing large numbers of Oricorio or Mega Blaziken ex on their ladder, both of which are tough, well-documented counters.
Problem: Medium. The deck hinges on correctly sequencing Sleep effects (sometimes in a chain) more so than the power of individual cards.
Overall conclusion: Yes, it is viable Tier 1 at the moment, just not invincible, and it is more relevant to know its ‘counters’ than most other decks.

Mega Altaria ex Deck Tips

Tip 1: Always try to achieve a Sleep effect before turn three; it’s the most important element in how well the deck performs.

Tip 2: Don’t attack with Mega Altaria ex until your Bench is 3 Pokemon unless it ends the game immediately.

Tip 3: Before you go with Mega Altaria ex as the attacker (Mega Altaria is a very nice attacker), check if the Oricorio’s are on the other guy’s Bench – the attack will be useless even with 3 or 4 on the Bench.

Tip 4: Use Cyrus to drag hurt Pokemon into your Active spot before attacking instead of attacking whatever the hell the opposition has left up.

Tip 5: Insert Darkrai and Chingling into the bench early; they do not need to attack, so they’re safe to develop while you set up your Sleep lock.

Frequently Asked Questions About Mega Altaria ex.

What is the strongest Mega Altaria ex deck in Pokemon TCG Pocket?
Darkrai/Espeon/Igglybuff Sleep-lock build has the most tournament support at the moment, about 11.5% of decks tracked are a Tier 1 archetype.

Which Pokemon is the best partner for Mega Altaria ex?
Espeon and Igglybuff for Sleep, Darkrai for passive damage on top of that Sleep, and Greninja as an alternative damage-spreading partner.

How many Mega Altaria ex should I play?
Two copies is typical, which provides uniformity without dominating the Sleep-enabling side of support Pokemon.

What is Mega Altaria ex weak? (i.e. What types is Mega Altaria – in its ex form – weak against?)
Oricorio’s Safeguard Ability prevents it from taking damage; Mega Altaria ex is an ex Pokemon, and Mega Blaziken ex is designed to one-shot bulky Megas like it.

How do you get past Mega Altaria ex?
Use Run Oricorio for Safeguard, apply pressure prior to Swablu evolving, or work on Benched Pokemon directly to reduce its damage cap.

Is it worth building Mega Altaria ex?
Yes, if you have, or are willing to build into, Espeon and Darkrai. It is a Tier 1 deck now, though it is actually a deck with genuine, well-researched counters, so you should be aware of them before you invest in the deck.

Related Pokemon TCG Pocket Guides

• Pokemon TCG Pocket Top rating decks
• Mega Blaziken from ex Deck Guide
• Decidueye ex Deck Guide
• Pokemon TCG Pocket Deluxe Pack EX Card List

You can double-check the available data by monitoring the live decklist and meta share on Limitless TCG and Pokemon Zone, both reliable sources to compare against any info in this guide, as the format keeps changing.

Dileep

I’m a content writer passionate about games and strategy. I’m dedicated to creating engaging, informative content for today’s audience. I keep a close eye on the latest gaming and industry trends to deliver entertaining, informative articles. Whether it’s exploring new tools or analyzing the sport, I bring a new, accessible voice to each episode. Let us connect and enhance your content with knowledge and insight!