Storm Emeralda M6: The Complete Guide to All 113 Cards

Storm Emeralda is the sixth MEGA Expansion Pack in the Japanese Pokemon TCG, and it landed on 31 July 2026 with the single most expensive card the Mega Evolution era has produced so far. If you have been watching Japanese boxes and wondering whether this is the one worth importing, this guide covers the full 113-card list, what a box actually costs per pack, how the secret rares are distributed, and what happens when the set crosses into English later this year.

What Storm Emeralda is and where it sits in the Japanese release order

Japanese Pokemon sets do not map one-to-one onto English ones. Japan releases smaller expansions more often, and the English side later bundles two or three of them into a single larger set. Storm Emeralda carries the set code M6, which places it as the sixth expansion in the MEGA Evolution block that began in 2025. The block so far has run: the opening MEGA sets, then Abyss Eye (M5) on 22 May 2026 with Mega Darkrai ex as its headline card, and now Storm Emeralda on 31 July 2026. Alongside it Japan also received the M6a 30th Celebration display, which is a separate anniversary product rather than part of the numbered block. That ordering matters for two practical reasons. First, it tells you which English set Storm Emeralda will feed into. Second, it tells you what the print run is likely to look like: Japanese main-block expansions are printed heavily and reprinted on demand, which is why Japanese sealed product almost never behaves like English sealed product on the secondary market.

Storm Emeralda release date, price and box contents

Storm Emeralda released in Japan on 31 July 2026, and the set list is published on the official Japanese Pokemon Card website. The core sealed product is the booster box, and the numbers are refreshingly simple compared with the English side:

• Packs per box: 30
• Cards per pack: 5
• Japanese retail price: 200 yen per pack
• Cards per box: 150

At 200 yen a pack, a Storm Emeralda box carries a Japanese MSRP of 6,000 yen. That is the number to keep in your head when you see import listings, because the gap between that figure and what a European retailer charges is shipping, import duty, and the fact that Japanese distribution allocates boxes rather than selling them freely. There is no elite trainer box equivalent in the Japanese line. Japan sells the booster box, the starter sets, and accessory products such as the Collection File Premium. If you are used to English releases where a set arrives in eight different configurations, the Japanese approach is deliberately narrower.

The full Storm Emeralda card breakdown: 113 cards

Storm Emeralda contains 113 cards in total. That splits into a 76-card main set and 37 cards that sit beyond the main numbering — what Japanese collectors call the secret rares. The secret rare distribution is where the set gets interesting:

• 12 AR (Art Rare) — full-art illustrations of common and uncommon Pokemon, the most obtainable of the chase tiers
• 18 SR (Super Rare) — gold-bordered full-art trainers and Pokemon ex
• 6 SAR (Special Art Rare) — the extended-artwork cards that drive most of the set’s value
• 1 MUR (Mega Ultra Rare) — a single card, and the reason people are opening this set

The 12 AR cards are the ones a casual opener will actually see. They appear frequently enough that a box will normally produce several, and they are the cheapest way into the set’s artwork if you are collecting rather than gambling. The 18 SR cards sit a tier above and include the full-art trainer cards that competitive players want. The 6 SAR cards are where a box either pays for itself or does not. And then there is the single MUR.

Mega Rayquaza ex: the Storm Emeralda chase card

The one MUR in Storm Emeralda is Mega Rayquaza ex, and it is the card that put this set on every collector’s radar. Early copies traded around 298,000 yen shortly after release — roughly the price of a used car in some markets, for a single piece of cardboard. Two things drive that number. Rayquaza is one of the most consistently valuable Pokemon in the entire TCG, with a track record going back to the original ex era. And MUR is a genuinely scarce rarity tier — one card across 113, pulled at a rate that means most people opening a Storm Emeralda box will never see one. A word of caution that applies to every hyped chase card: the 298,000 yen figure is an early-market number, set when supply was thinnest and demand loudest. Japanese sets get reprinted. Prices on Japanese chase cards typically soften over the first three to six months as more product reaches the market. If you are buying the single rather than the sealed box, patience has historically been rewarded.

The three MEGA Starter Sets and the Collection File Premium

Storm Emeralda did not launch alone. Japan released three MEGA Starter Sets alongside it, each a ready-to-play 60-card deck built around a Mega Evolution line. Starter sets are the cheapest legitimate route into the Japanese format: they are constructed decks, not booster products, so there is no randomness and no chase. They are worth considering for a specific reason. If you want to play the Japanese format rather than collect it, a starter set plus a handful of singles will get you a functional deck for a fraction of what opening Storm Emeralda boxes would cost. Sealed product is for collectors and gamblers; starter sets are for players. The Collection File Premium is a binder product — a storage accessory rather than a card product, aimed at people who intend to keep the set’s artwork rather than sleeve it into a deck.

What Storm Emeralda pull rates actually look like

Nobody publishes official pull rates for Japanese Pokemon sets, so anything you read is community data. That said, the structure of the set tells you a lot before a single box is opened. A box gives you 150 cards across 30 packs. With 12 AR cards in the set, seeing several ARs per box is normal. With 18 SR cards, one or two per box is a reasonable expectation. With 6 SAR cards, a box that produces one is doing well. And with a single MUR across the entire set, the honest framing is that a Mega Rayquaza ex is not something you plan around — it is something that occasionally happens to somebody. This is the argument against treating these boxes as an investment. The expected value of a box is dominated by a card most boxes will not contain. If you want a specific card from the set, buying the single is almost always cheaper than opening boxes until it appears. If you want the experience of opening, that is a legitimate reason to buy a box — just price it as entertainment rather than as an asset.

Japanese boxes versus English boxes: the maths

The comparison people usually get wrong is packs-to-cards. A Storm Emeralda pack contains 5 cards for 200 yen. An English booster pack contains more cards at a higher price. On a per-card basis Japanese product looks cheap, but the two are not equivalent products:

• Japanese packs are smaller but denser. Fewer filler commons per pack, and the hit distribution is compressed into 5 cards.
• Japanese print runs are larger and ongoing. Sealed Japanese product rarely appreciates the way sealed English product sometimes does.
• Japanese card stock and centring are generally better. This is why Japanese cards dominate high-grade population reports.
• Japanese cards are not tournament-legal outside Japan unless your event explicitly allows them.

That last point is the one that catches people out. If you are buying Storm Emeralda to play at a local league in Europe, check the rules for your event first. Most organised play requires cards in the language of the region, or at least a translation card.

What Storm Emeralda becomes in English: Delta Reign (ME06)

Storm Emeralda feeds the English set Delta Reign, set code ME06, scheduled for 6 November 2026. As is normal, the English release is not a straight translation — English sets combine material from more than one Japanese expansion and reshuffle the secret rare numbering. Practically, that means most of the Storm Emeralda cards you care about will appear in English within a few months, in English packaging, at English pack sizes. Whether you should wait depends on what you want:

• You want to play in English organised play: wait for Delta Reign.
• You want the Japanese artwork treatment or the better card stock for grading: buy Storm Emeralda.
• You want the cheapest route to a specific card: compare the Japanese single against the eventual English single — they often diverge sharply.

Storm Emeralda versus Abyss Eye (M5): which Japanese box is the better buy

The set immediately before Storm Emeralda is Abyss Eye (M5), released 22 May 2026 with Mega Darkrai ex as its headline. We stock the Japanese Abyss Eye M5 booster box, and it is a useful comparison point. Abyss Eye has had two extra months on the market, which means its chase card has already been through the early price spike and the subsequent correction. M6 has not. If you are buying sealed to open, that difference is mostly irrelevant. If you are buying sealed to hold, an older Japanese set with a settled market is usually the more predictable purchase. There is also a straightforward collector argument for buying both: Abyss Eye and M6 are consecutive expansions in the same block, and block-complete Japanese collections hold together better than scattered singles.

Should you buy Storm Emeralda sealed or wait for singles?

Here is the honest breakdown, without the hype:

• Buy a sealed Storm Emeralda box if you enjoy opening packs, you want a spread of AR cards for a binder, or you want Japanese-stock cards to submit for grading.
• Buy singles if you want a specific card. The maths is not close — a targeted single beats box-opening in almost every case.
• Wait if you are price-sensitive. Japanese sets are reprinted, and the first eight weeks after release are consistently the worst time to buy both sealed product and chase singles.

The one scenario where buying Storm Emeralda immediately makes sense is if you intend to open it now, while the set is current and the cards are in demand for the Japanese format. Sealed product bought to open has no reason to sit in a cupboard.

Buying Japanese Pokemon products from Europe

A few practical notes if you are importing rather than buying locally. Japanese product reaches Europe through allocation, so availability is genuinely lumpy — a set can be in stock, gone for three weeks, then back. Prices move with the yen, which has made Japanese product noticeably cheaper for European buyers over the last few years. Check whether a listing is for a sealed box or a loose pack lot. Loose packs from a box that has already been searched are a real problem in the import market, and a sealed box with intact factory shrink is the only reliable protection against it. You can browse our full Pokemon TCG range for what is currently in stock, including the Japanese 30th Celebration M6a display that released alongside Storm Emeralda.

Protecting Japanese cards: sleeve sizing matters less than you think

A persistent myth says Japanese Pokemon cards need special sleeves. They do not. Japanese Pokemon cards are 63 by 88 millimetres — exactly the same as English cards. Standard-size sleeves fit both. What does differ is condition sensitivity. Japanese cards have a reputation for better centring and a cleaner finish, which is why they show up disproportionately in high-grade population reports. That reputation only holds if the cards are handled properly from the moment the pack is opened. If you are opening packs with grading in mind, sleeve the hits immediately, and use a double-sleeve setup for anything going into a submission. Matte sleeves are the usual recommendation for cards you intend to keep, because the textured back resists the surface scuffing that clear sleeves transfer over time. Our card sleeve range covers the standard sizes that Japanese and English cards share.

Set legality and what happens next

The set is legal in the Japanese format from release. Outside Japan, Japanese-language cards are not legal in most organised play unless the event rules specifically permit them, and even then a translation is usually required. Once Delta Reign arrives in English on 6 November 2026, the cards that carry over become legal in English-language events in their English printings. Longer term, expect the market to follow the standard Japanese pattern: a sharp early spike on the MUR, a gradual softening over the first few months as reprints reach shelves, and a slow floor forming once the set rotates out of active printing.

Frequently asked questions

When did Storm Emeralda release?

Storm Emeralda released in Japan on 31 July 2026. The English set it feeds into, Delta Reign (ME06), is scheduled for 6 November 2026.

How many cards are in a Storm Emeralda booster pack?

Five. A Storm Emeralda booster box contains 30 packs, so 150 cards per box, at a Japanese retail price of 200 yen per pack.

What is the most valuable card in Storm Emeralda?

Mega Rayquaza ex, the set’s single MUR (Mega Ultra Rare). Early copies traded around 298,000 yen after release, though Japanese chase cards typically soften over the following months.

How many cards are in the Storm Emeralda set?

113 in total: 76 main-set cards plus 37 secret rares, split into 12 AR, 18 SR, 6 SAR and 1 MUR.

Can I use Storm Emeralda cards in tournaments outside Japan?

Generally no. Japanese-language cards are not legal in most organised play outside Japan. Check your specific event’s rules, and wait for the English Delta Reign printings if you intend to compete.

The short version

Storm Emeralda is a well-built Japanese expansion with a genuinely scarce chase card and a sensible price per pack. It is a good set to open and a poor set to hoard, because Japanese print runs are large and ongoing. If you want Mega Rayquaza ex, buy the single rather than the boxes. If you want the artwork, the AR tier gives you twelve cards at a fraction of the cost. And if you only want to play, the MEGA Starter Sets or the English Delta Reign release on 6 November 2026 will serve you better than any amount of sealed Storm Emeralda product.