Storm Emeralda vs Delta Reign is not really a contest between two sets. It is the same Mega Rayquaza ex expansion printed twice: once in Japanese, on sale since 31 July 2026, and once in English, arriving on 6 November 2026. The question for a UK collector is simpler than the search suggests. Do you want these cards now, in Japanese, or from 6 November, in English? The answer depends on what you plan to do with them, and the two prints differ in more than the language on the front.
Is Storm Emeralda the same set as Delta Reign?
Yes. Storm Emeralda (M6) is the Japanese expansion that becomes Delta Reign (ME06) in English. Both are built around Mega Rayquaza ex, both add Mega Golisopod ex, Mega Golurk ex and Mega Malamar ex, and both introduce the paired Legendary Stadium cards: one artwork split across two Stadiums that sit on the table together and count as a single Stadium in play. The Japanese print released first, so the full card gallery has been public since July and the Japanese singles market has already priced every chase.
The English set is bigger. Storm Emeralda runs to 76 cards in the main set and 113 with secret rares. Delta Reign is confirmed at more than 135 cards, because English sets fold in cards from Japanese promos and side products alongside the main expansion. If a card exists in Storm Emeralda it will exist in Delta Reign. The reverse is not quite true.
Storm Emeralda vs Delta Reign: what actually differs
Beyond the language, the products themselves are different objects. A Japanese booster box is a 30-pack display of five-card packs. An English booster box is 36 packs of ten cards plus an energy. That changes the maths on every hit.
| Storm Emeralda (Japanese) | Delta Reign (English) | |
|---|---|---|
| Release | 31 July 2026 | 6 November 2026 |
| Set size | 76 main, 113 with secret rares | 135+ cards |
| Pack | 5 cards | 10 cards plus energy |
| Booster box | 30 packs | 36 packs |
| Sealed lineup | Booster box and packs | Booster box, Elite Trainer Box, Pokémon Center ETB, booster bundle, blisters |
| Card text | Japanese | English |
Japanese packs are short but dense. Every five-card pack carries one slot that is Rare or better, which is why a Japanese box feels like it delivers hits at a steady rhythm rather than in bursts. English packs run more cards per pack and more packs per box, with the chase-tier odds spread across the larger set. If you want to feel the difference before you spend anything, our pack opening simulator already runs the Storm Emeralda pack structure with live card values, and the pull rate calculator covers the English Mega Evolution sets for comparison.
The Japanese Storm Emeralda booster box: 30 packs of five cards, sold as a display.
The chase cards are already priced
Because Japan has had the set since July, there is no guesswork about what matters. The Mega Rayquaza ex #113 (the gold Mega Ultra Rare) is the most valuable card in the set by a distance, with the Mega Rayquaza ex #110 Special Art Rare a clear second. After those two the curve drops hard: Raikou ex #108, the Mega Rayquaza ex #95 and the Zinnia's Trust special art each trade for a small fraction of either. That is one of the most top-heavy chase pools of the whole Mega Evolution era, and the English versions will inherit the same shape once Delta Reign lands. These are the five most valuable today, re-sorted daily:
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Mega Rayquaza ex
$747 ≈ £559
1 in 690-3,000 packsBox (30): 1.0-4.3%
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Mega Rayquaza ex
$272 ≈ £204
1 in 540-4,140 packsBox (30): 0.72-5.4%
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Raikou ex
$44 ≈ £33
1 in 540-4,140 packsBox (30): 0.72-5.4%
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Mega Rayquaza ex
$25 ≈ £19
1 in 180-270 packsBox (30): 11-15%
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Zinnia’s Trust
$21 ≈ £16
1 in 540-4,140 packsBox (30): 0.72-5.4%
Prices are ungraded TCGplayer market values for the Japanese cards, updated daily (last 23 Oct 2026); £ at today’s rate. Odds are for that exact card.
Japanese chase cards also grade well. Print quality is consistent, and PSA 10 multiples on the two big Rayquazas are already roughly double the raw price. If the plan is to pull, grade and hold the top card, the Japanese print gives you a head start on a card the English market has not yet seen. Our Delta Reign card list and set guide covers every card, the full chase list and the English product lineup in more depth.
Price and timing for UK collectors
Storm Emeralda booster boxes are stocked by the UK retailers that carry Japanese product. Buying direct from Japan looks cheaper on the listing and rarely is once it lands. A single box sits under the £135 goods-value threshold, so no customs duty is due, but 20% import VAT applies from the first pound on the goods plus shipping, and the courier adds a handling fee before the parcel is released. Order two boxes in one parcel and the consignment crosses £135, which adds 2% customs duty and pulls that duty into the VAT base as well. Run any Japanese listing through our import tax calculator before you decide, and read the UK customs guide if you have never imported before.
On the English side, the Pokémon Center Elite Trainer Box is the product that sells out first. Pokémon Center opened Delta Reign preorders on 30 September, 37 days before release, and its ETB has already sold out there. That is the format the Japanese set simply does not have: there is no Storm Emeralda ETB, no Pokémon Center exclusive promo, no bundle. If the PC ETB is what you collect, the only route is the English release, and the UK preorder guide explains how Pokémon Center allocation works.
The Delta Reign Pokémon Center Elite Trainer Box, the format Storm Emeralda never had.
What you can do with Japanese cards
Collect and grade them, freely. Play them in a UK event, no. Play! Pokémon rules only allow cards in the language of the region, so a Japanese Mega Rayquaza ex is a shelf piece here, not a deck piece. Japanese cards also sit in a separate market: they trade against other Japanese copies, not against the English print, so a Storm Emeralda Rayquaza does not become worth less when Delta Reign releases. The two markets move together but they do not merge.
One more practical point. Japanese set text, attack names and the paired Stadium instructions are all in Japanese. The cards are identical in function, but if you want to read what you pulled without a translation, wait for November.
Which one should you buy?
Buy Storm Emeralda now if you collect Rayquaza, you grade, or you simply want the set on your shelf before winter. The chase pool is known, and the Japanese print quality is a genuine advantage on the two cards that carry the value. Wait for Delta Reign if you play, you want the Pokémon Center Elite Trainer Box, or you want English text on more than 135 cards including the extras the Japanese set never printed.
Plenty of collectors will do both, and that is not indecision. It is the same set at two price points and two dates. Our Delta Reign collection is where the English release lists, alongside the rest of the Mega Evolution era and everything sealed in the vault. Drop Alert subscribers hear first when an allocation goes live, the same way they did for the 30th Celebration allocation.
