A prerelease is a store event held before a new set reaches shelves. You get a box of the new cards, build a deck from it, and play a few casual games. Everyone starts on the same footing, which makes it one of the friendliest events in the game for new players.
The current one: Mega Evolution: Delta Reign
The official Pokémon TCG site lists Mega Evolution: Delta Reign for November 6, 2026. Its expansion page says Build & Battle Boxes are available at Play! Pokémon store prerelease events starting October 24, 2026.
Prerelease events run at individual stores on their own schedules and with their own entry fees. Find them on the official Event Locator, then call or check the store to sign up. They can fill up.
What is in the box?
The prerelease product is the Build & Battle Box. The official product guide describes its core as a smaller 40-card deck you can customize for quick games, and recent expansion pages list it as a 40-card deck plus 4 booster packs of the new set.
So at the event you have two piles: a ready-to-play deck, and four packs of fresh cards.
How is a prerelease game different?
A prerelease uses Limited rules: you play with only the cards from your box, plus Basic Energy. The decks are 40 cards, not 60. The basic turn is the same game you learned in how a turn works.
The Play! Pokémon Tournament Rules Handbook sets Limited games at 4 Prize cards instead of 6, which keeps them quick, and it drops the usual limit of 4 copies of a card, unless a card’s own text sets a limit. The organizer will confirm the details at the start.
Building your deck in under half an hour
The safest method for new players: start from the 40-card deck in the box, and swap.
- Open your packs and sort them. Pokémon by type, then Trainers, then Energy.
- Look for Evolution lines. A Basic with its Stage 1 is worth far more than either alone. A full line in one type is the best thing your packs can give you.
- Pick your types. Stay with the box deck’s type, or switch to one if your packs gave you a strong line in it. One type is easiest; two at most.
- Swap one for one. For every card you add, take one out. The deck must stay at exactly 40.
- Cut first: off-type Pokémon, single Stage 2 cards without their earlier steps, and attacks that need Energy you are not playing.
- Keep the Trainers that find cards. Search and draw Trainers matter even more in a small deck.
- Check your Energy count against the box deck’s. If you changed type, change the Energy with it.
Done is better than perfect. A sensible deck built in twenty minutes beats a clever one finished as round one starts.
During the games
- Read every new card out loud the first time it is played. Nobody knows the set yet, including your opponent.
- Ask questions. Prerelease is relaxed, and players expect to look things up.
- Fill your Bench. With fewer Prize cards, one Knock Out matters more, and an empty Bench loses games fast.
- Trade after, not during. Many players trade the cards they did not use.
What to bring
- Card sleeves for 40 cards, plus a few spares.
- Damage counters and a coin.
- A pen, and a Player ID if you have one.
- A bag to carry home the box and the cards you did not play.
After the prerelease
Keep the deck together for a week and play it at League. A 40-card deck is a great teaching deck for a younger sibling, and the cards you opened become your first collection from the new set.
Next lesson
Pokémon TCG Odds: Opening Hands, Mulligans, and Prized Cards
Level 3 begins next: the odds behind your opening hand, mulligans, and Prize cards, worked out from the real numbers in a 60-card deck.
Want the course by email?
Pick the right first product, learn how a turn works, read any card, then build decks, win the Prize trade, and walk into League night, a prerelease, and a tournament ready to play. Free, one short lesson at a time.
Unofficial. Not affiliated with or endorsed by The Pokémon Company International, Nintendo, Creatures, or GAME FREAK. Pokémon is a trademark of Nintendo.