Pokemon TCG: Mega Evolution — Storm Emeralda (Japanese set code: M6) is the newest Mega Evolution era booster set from The Pokémon Company, released in Japan on July 31, 2026. It is the Japanese source set for the upcoming English Mega Evolution set Delta Reign, which follows on November 6, 2026.
The set is headlined by Mega Rayquaza ex, marking the Sky High Pokémon's first Mega Evolution card of the modern era and its first new TCG artwork since the XY era. The lineup also includes Mega Malamar ex, Mega Golisopod ex, Mega Golurk ex, Wishiwashi ex and Talonflame ex, alongside a connected Mega Gallade ex promo card. Storm Emeralda also debuts the split Stadium mechanic with Legendary Summit and Legendary Trench — each spread across two cards that must be combined from hand to be played as a single Stadium, a first for the Pokémon TCG.
The full set runs 113 cards — a 76-card main set plus 37 secret rares: 12 Art Rares, 18 Super Rares, 6 Special Art Rares and a single top-slot chase. A run of Zinnia-themed Trainer cards ties the set's story to the Draconid lore that first introduced Mega Rayquaza in the core games, with the Mega Rayquaza ex and Zinnia high-rarity cards drawing the strongest early collector attention. Read our full Storm Emeralda set guide for the chase cards and the Japanese-vs-Delta-Reign decision.
Box contents: 30 booster packs per box. 5 cards per pack. 150 total cards per box (standard Japanese booster format). Language: Japanese. All card text is in Japanese. Condition: Factory sealed.
Ideal for Mega Rayquaza collectors, Draconid and Zinnia lore fans, and anyone who wants the Japanese originals of one of the Mega Evolution era's biggest 2026 releases ahead of the English Delta Reign set. Cards are randomised and specific pulls are not guaranteed. Recommended for ages 6 and up.