Guaranteed Pokémon, Random Booster Cards
The 30th Celebration Pokémon ex Boxes—Sylveon ex and Greninja ex launched on 16 September 2026, according to Pokémon’s official September roundup. Each version contains a foil promo of its featured Pokémon in regular playable size and oversize format, plus four 30th Celebration booster packs.
These boxes suit collectors who want a specific Pokémon alongside some pack opening. The promo is the predictable part; the cards inside the boosters remain random.
Choose the Promo You Want to Keep
If you collect Eevee’s Evolutions, Sylveon ex may fit your binder. A Greninja-focused collection may make the other box more appealing. Inspect the official artwork rather than assuming a product featuring a popular Pokémon must be the better financial purchase.
Neither the character’s popularity nor the oversize card establishes a future price. This guide makes no claim that one box has better pull rates or a scarcer guaranteed promo.
Treat the Two Card Sizes Separately
The oversize card is a different format from the normal-size TCG card. It will not fit a standard binder pocket or sleeve. Plan an appropriately sized storage solution before opening if you intend to keep it in good condition.
When buying singles online, check which size is offered. A photograph without scale can cause confusion, and listings may use the same Pokémon name for either item. Ask the seller to confirm normal-size versus oversize when the description is unclear.
Compare the Box with Buying Singles
Calculate the delivered cost of the complete box, then compare it with the actual price of the promo you want and another source of anniversary packs. Do not subtract an imagined resale amount for an accessory you have no intention of selling.
If you are buying an opened collection, confirm all contents individually. The outer box and oversize card do not prove that the four boosters remain sealed or that the regular-size promo is included.
Inspect Promos Before Assuming They Are Mint
Remove the card carefully without pushing its edges against packaging. Check front-and-back centering, corner whitening, surface marks, and dents. Being newly opened is not a guarantee of a top professional grade.
Use an appropriate sleeve before moving the normal-size card into storage. Keep the oversized version flat and away from humidity. Record its exact promo identifier separately from any booster card featuring the same Pokémon.
Bottom Line
These are character-led four-pack products. Buy for the confirmed contents and the artwork you enjoy, not an unsupported profit forecast.
Official Source
Pokémon’s September 2026 product release roundup, checked 13 October 2026.