How can you tell your card is this one?

Look at the bottom of your card: you should read 30C 148/128 there. Its illustration is signed GIDORA.

Which set does it come from?

It comes from the 30th Celebration set, released here on 16 September 2026.

30th Celebration

Greninja ex 30C 148/128

30CKOSpecial illustration rare

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Versions of this card

Check the number and illustration against the card you are looking for.

30C 2130th CelebrationDouble rareYou receive€0.05
30C 14830th CelebrationSpecial illustration rareSelected printingYou receiveYour price is waiting under another language.

What you might be wondering about this card

How can you tell your card is this one?: Look at the bottom of your card: you should read 30C 148/128 there. Its illustration is signed GIDORA.
Which set does it come from?: It comes from the 30th Celebration set, released here on 16 September 2026.

When it came out

30th Celebration landed here on 16 September 2026.

In Japan these cards were already in shops on 16 September 2026, under the code M6a. That is 0 days ahead of us.

Every set, with both of its dates

What the card itself says

Its characteristics and effects in play, with the original text when available.

HP: 300
Type: Water
Stage: Basic
Retreat cost: 1
Weakness: ×2
Regulation mark: J
Number: 148/128
Set: 30th Celebration30CSet guide
Illustrated by: GIDORA

The Korean text is not available yet. Text shown: English.

Its attacks

Stealthy Slash

This attack does 30 damage to 1 of your opponent's Pokémon for each damage counter on that Pokémon. <em>(Don't apply Weakness and Resistance for Benched Pokémon.)</em>

Aqua Edge

160

What to make of it

Have a look at what it does well, then at what will get in your way. After that you'll know whether it belongs in your deck.

A strength
300 HP. Only 1 cards in 30th Celebration carry more.
A strength
Retreat cost 1. One Energy to discard and it is back on the Bench, which matters a lot on the turn you need to swap attackers.
A strength
Mega Greninja ex runs it in 10 of the 65 lists we have read, seen across 10 different tournaments.
A strength
It is a Basic Pokémon. You can put it down on your very first turn, with nothing to evolve through.
A strength
Mark J. It is one of the marks currently accepted in Standard: H, I, and J.
Keep in mind
It is an ex card. The turn it goes down your opponent takes 2 Prizes instead of one, and games do turn on exactly that.
Keep in mind
Weakness Lightning ×2. Against a Lightning Pokémon, apply that to the damage it takes — it climbs fast. Of the 5,392 tournament lists we have read, 439 run at least one Pokémon of that type.

Standard format: source checked on September 27, 2026. TCGdex

Who plays it

Every printing of Greninja ex plays the same way at a tournament. So the decks below count them all together, and the last column shows the one players wrote on their list.

The decks that list this card, with how many lists and how many tournaments
Deck	Lists	Tournaments	Printing listed
Mega Greninja ex	10 of 65	10	30C 21
Greninja ex	4 of 68	3	30C 21