Vault Journal · New Set Update · August 2026

Storm Emeralda: Eleven Years Since the Last Mega Rayquaza

A deliberate echo of the 2015 set that introduced the card, three Stadiums that each need two cards to work, and a roster pulled from the Mega Dimension DLC.

The Set

Seven Sets In

MEGA Expansion Pack Storm Emeralda (ストームエメラルダ, set code M6) released in Japan on 31 July 2026, with Traditional Chinese editions following in Taiwan and Hong Kong on 7 August. It runs to 113 cards - a 76-card main set numbered 001 to 076, then 37 secret rares from 077 to 113. Boxes hold 30 packs at five cards a pack. The English equivalent, Delta Reign, is scheduled for 6 November, an unusually long three-month gap caused by the global 30th Celebration release taking the September slot.

Four Mega Evolution ex cards anchor the set: Mega Golisopod ex at 009, Mega Golurk ex at 033, Mega Malamar ex at 048 and Mega Rayquaza ex at 058. Three of those four arrived in the Mega Dimension DLC that expanded Pokémon Legends: Z-A in December 2025, which makes Storm Emeralda the second MEGA set built from DLC material after Abyss Eye. That is a more useful way to read this block than release order, and we come back to it at the end.

The Return

Emerald Break, Eleven Years On

Rayquaza has been in this game a long time. It debuted in EX Dragon in 2003 and has appeared across more than twenty sets since, including the EX Deoxys Gold Star that remains the most valuable Rayquaza card ever printed. Mega Rayquaza is a different story. It arrived in the Japanese set Emerald Break in March 2015, reached English shelves as Roaring Skies that May, took a fourth and final artwork in Ancient Origins that August, and then stopped. Four cards in five months, all illustrated by 5ban Graphics, and nothing new for eleven years. The 2021 Celebrations Classic Collection reprinted one of them, but a reprint is not a return.

Which is what makes the naming here deliberate rather than coincidental. Emerald Break was built on Omega Ruby and Alpha Sapphire, and the set took its name from the attack printed on its mascot card - spelled out in Latin script across the artwork, in the bilingual convention we covered in the MEGA Dream ex piece, where Japanese cards carry English attack names and English cards carry Japanese ones. Storm Emeralda does exactly the same thing: the set is named after Mega Rayquaza's attack, and the trainer cast is Hoenn again - Zinnia, Aarune and Tate & Liza, where 2015 had Wally and Winona. The Kyogre and Groudon Art Rares at 080 and 084 complete the weather trio around it. Different characters, same source material, same naming convention, eleven years apart.

086/078 from Emerald Break, 2015, by 5ban Graphics. 110/076 from Storm Emeralda, 2026, by Kazuki Minami. Both Colourless, both counting attacks.

One note for anyone cross-referencing Japanese listings: the card at 111 reads ギリー (Gilly) in Japanese and Aarune in English. Same character, one card, not two.

The Mechanic

A Stadium Cut in Half

If the Rayquaza return is the headline, the split Stadium is the genuinely new thing. Three Stadiums occupy six numbered slots at the end of the main set, each printed as a left and right half sharing one continuous illustration. Neither half does anything alone. You hold both, play both, and they count as a single Stadium in play. It is a direct echo of the LEGEND cards from HeartGold & SoulSilver, and it is the first time since then that one game piece has needed two physical cards.

Each pair laid side by side as intended. Ocean Trench by danciao, Summit by nagimiso, Lava Cave by akagi - three pairs, three illustrators.

Stadium	Cards	Effect
Legendary Ocean Trench	071 / 072	All healing doubled, both players
Legendary Summit	073 / 074	Colourless Pokémon give up one less Prize when knocked out by an attack
Legendary Lava Cave	075 / 076	Evolution Pokémon lose their Abilities, both players

Names translated from the Japanese cards - 伝説の海溝, 伝説の山頂 and 伝説の溶岩洞. English coverage has been inconsistent here, with the 075/076 pair widely listed as Legendary Lava Lake; 溶岩洞 is a lava cave. Official English names arrive with Delta Reign in November.

What makes this collector-relevant rather than just player-relevant is the artwork. A split Stadium is a diptych with rules text attached - two cards that only resolve into a complete image when you own both and lay them side by side. We wrote about the same design instinct in the Gem Pack Vol. 4 deep dive, where Deerling and Sawsbuck were printed as a paired full art. The difference is that Storm Emeralda builds the pairing into the rules, so the game itself insists you collect both halves. Three panoramas at the bottom of a main set, at a rarity anyone can pull, is the quietest good idea in this release.

There's a knock-on effect worth spotting. Needing two specific cards in hand before you can play one Stadium is a real consistency problem, and the set answers it directly: Aarune at 111 searches your deck for up to three Supporter and Stadium cards at once - enough to assemble a complete Legendary Stadium and still have a card spare. That is why an obscure Secret Base character from Omega Ruby and Alpha Sapphire ended up with a Special Art Rare in a Rayquaza set. The card exists to make the mechanic work.

The Cover Card

Mega Rayquaza ex, Four Times

Mega Rayquaza ex appears four times: the base card at 058, a full art Super Rare at 095, the Special Art Rare at 110, and the gold-etched Mega Ultra Rare that closes the numbering at 113. These are four printings of one card, not four cards - identical rules text, different treatments. Worth stating plainly, because the SAR and the MUR are frequently written up as though they were separate releases.

Mechanically it is a Colourless Basic with 280 HP, Lightning weakness and Fighting resistance. The Ability, Champion's Roar, triggers once when you bench it from hand: look at the top four cards of your deck, attach one Basic Energy from among them, bottom the rest. The attack, Storm Emeralda, deals 50 damage for every Fire and Lightning Energy attached across your entire board - not just to Rayquaza. That last detail is the whole design. The deck wants Energy spread wide rather than stacked on the attacker.

The Colourless typing looks wrong at first glance for a Dragon, but it isn't new. The 2015 M Rayquaza-EX was Colourless as well, and its Emerald Break attack counted Benched Pokémon at 30 damage each. Storm Emeralda is the same idea scaled up - count something across your board, multiply. What has changed is that the set now builds around it: Legendary Summit hands Colourless Pokémon a Prize discount, so the card, the Energy engine and the Stadium arrive as one package.

The Chase

Six SARs, and the One That Isn't There

The secret block breaks into four clean tiers: twelve Art Rares (077 to 088), eighteen Super Rares (089 to 106), six Special Art Rares (107 to 112) and one Mega Ultra Rare at 113. The SAR pool is Mega Golisopod ex (107), Raikou ex (108), Mega Golurk ex (109), Mega Rayquaza ex (110), Aarune (111) and Zinnia's Trust (112).

Which means Mega Malamar ex is the only one of the set's four Mega ex without an SAR. It appears at 048 in the main set and at 094 as a Super Rare, and stops there. In a set presented as a four-Mega release, giving three of them the top treatment and leaving the fourth at SR is the one decision here we'd call a miss - the same kind of asymmetry we flagged in Gem Pack Vol. 3, where the top tier carried cards that didn't belong in it. It doesn't damage the set. It does mean the box art promises a roster the chase doesn't quite deliver.

The 110 Mega Rayquaza ex is the card everyone will photograph, and its backstory earns it. It's illustrated by Kazuki Minami, a winner of the 2024 Pokémon TCG Illustration Contest, and it is only their second card for the game - roughly two years between winning and this. Raikou ex at 108 is by Oku and is the set's sleeper, pulling interest from players and collectors at once. The rest: Mega Golisopod ex at 107 by nagimiso, Mega Golurk ex at 109 by Takeshi Nakamura, Aarune at 111 by Shimaris Yukichi, Zinnia's Trust at 112 by Teeziro, and the gold MUR at 113 by takuyoa.

One name appears twice. nagimiso illustrated both the Legendary Summit pair and the Mega Golisopod ex SAR, the only artist with work in the Stadium panoramas and the top rarity tier. Worth knowing if you're building by illustrator rather than by rarity. And for anyone cross-referencing Japanese listings, Zinnia is printed as ヒガナ (Higana) - the same naming gap as Aarune and ギリー.

113 / 076 MUR, by takuyoa. The card that closes the set.

The Odds

What Nobody Can Actually Tell You

The Pokémon Company does not publish pull rates for Japanese sets. Worth stating plainly, because a lot of coverage presents estimates as though they were official. When we broke down the Gem Pack Vol. 4 odds we worked from a published production ratio graphic and the maths was verifiable. Nothing equivalent exists here. Every number below is aggregated from community opening data on comparable MEGA sets and should be read as directional.

The shape matters more than the digits. A box reliably gives you a dozen or so cards with real secondary value. An SAR is roughly a coin flip per box, but with six in the pool, which one you hit is a bigger swing than whether you hit one at all. The MUR sits at case-level odds - a sealed case is twelve boxes, and most people who open one will not see it. Anyone framing a Storm Emeralda box as a route to the gold Rayquaza is selling a lottery ticket and calling it a plan.

Series Context

Three Phases of the MEGA Series

The MEGA Series is usually described as one continuous block. It isn't. Read it by where each set's Mega Evolutions come from and it falls into three clear phases.

Set	Japan	Mascot	Source	Cards
M1L Mega Brave	1 Aug 2025	Mega Lucario ex	XY-era classic	92
M1S Mega Symphonia	1 Aug 2025	Mega Gardevoir ex	XY-era classic	93
M2 Inferno X	26 Sep 2025	Mega Charizard X ex	XY-era classic	116
M2a MEGA Dream ex	28 Nov 2025	Mega Dragonite ex	Z-A base game	250
M3 Nihil Zero	23 Jan 2026	Mega Zygarde ex	Z-A base game	117
M4 Ninja Spinner	13 Mar 2026	Mega Greninja ex	Z-A base game	120
M5 Abyss Eye	22 May 2026	Mega Darkrai ex	Mega Dimension DLC	118
M6 Storm Emeralda	31 Jul 2026	Mega Rayquaza ex	Mega Dimension DLC	113

M2a is a High Class Pack rather than a main expansion, which is why its count sits so far outside the pattern. Read past it and the main line drifted upward - 92, 93, 116, 117, 120, 118 - before Storm Emeralda cut back to 113 with only six SARs in it. A smaller pool concentrates the chase. Compare MEGA Dream ex, where seventeen SARs across 250 cards meant a good box could still miss everything you wanted. M6 is the tighter proposition, even though it's the less generous set on paper.

The Verdict

Sealed or Singles

You want the Rayquaza SAR	Buy the single. One of six SARs at roughly one every two to three boxes is a long, expensive route to a specific card.
You want the Hoenn trio	Singles. Kyogre 080 and Groudon 084 are the two most affordable interesting cards in the set.
You want the split Stadiums complete	A box. Six low-rarity cards across 30 packs is exactly what sealed product is good at, and buying six halves individually is fiddly.
You want to open something	A box. The guaranteed AR and SR layer is genuinely dense in this set.
You're holding sealed	Set your entry price before you buy. M6 opened well above where recent MEGA sets launched, and nobody knows yet whether it settles the way they did.

Storm Emeralda isn't the most generous set in the MEGA Series and it isn't flawless - the missing Malamar SAR is a real gap. But it is the first one in the block with a design idea of its own, and the first to give a card its second season eleven years after the first ended. The split Stadium is a genuinely new object in this game, printed at a rarity anyone can afford, and it will be what collectors remember about M6 long after the gold Rayquaza has settled into whatever it's going to be worth.