How can you tell your card is this one?

Look at the bottom of your card: you should read MEP 81 there. Its illustration is signed 5ban Graphics.

Which set does it come from?

It comes from the MEP Black Star Promos set, released here on 26 September 2025.

MEP Black Star Promos

Mega Greninja ex MEP 81

MEPJPPromo

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Versions of this card

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

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 MEP 81 there. Its illustration is signed 5ban Graphics.
Which set does it come from?: It comes from the MEP Black Star Promos set, released here on 26 September 2025.

When it came out

MEP Black Star Promos landed here on 26 September 2025.

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: 350
Type: Water
Stage: Stage 2
Retreat cost: 1
Weakness: ×2
Regulation mark: J
Number: 81
Set: MEP Black Star PromosMEPSet guide
Illustrated by: 5ban Graphics

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

Its Ability

Mortal Shuriken

Once during your turn, if this Pokémon is in the Active Spot, you may discard a Basic Energy card from your hand in order to use this Ability. Place 6 damage counters on 1 of your opponent's Pokémon.

Its attacks

Ninja Spinner

120+

You may put a Energy attached to this Pokémon into your hand and have this attack do 80 more damage.

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
350 HP, and nothing in Chaos Rising goes higher. That is the wall your opponent has to break through before taking a Prize.
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
It has an Ability, Mortal Shuriken. An Ability costs you no attack, so you can use it and still swing the same turn.
A strength
Mega Greninja ex runs it in 65 of the 65 lists we have read, seen across 60 different tournaments.
A strength
Mark J. It is one of the marks currently accepted in Standard: H, I, and J.
Keep in mind
It is a Mega Evolution ex, and that is the most expensive rule in the game. The turn it goes down your opponent takes 3 Prizes instead of one. They need six to win, so 2 knockouts on this card are enough. Send it out knowing that.
Keep in mind
It is a Stage 2. You have to come through Frogadier to get here, or find a Rare Candy to skip the middle step.
Keep in mind
Weakness Lightning ×2. Against a Lightning Pokémon, apply that to the damage it takes — it climbs fast. Of the 5,384 tournament lists we have read, 438 run at least one Pokémon of that type.

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

Who plays it

Every printing of Mega 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	65 of 65	60	CRI 22
Palafin ex	18 of 42	18	CRI 22
Greninja ex	14 of 67	14	CRI 22
Greninja ex / Blaziken ex	11 of 24	11	CRI 22
Cinderace ex	1 of 6	1	CRI 22
Hydreigon ex	1 of 65	1	CRI 22
Mega Charizard X ex	1 of 53	1	CRI 22
Wailord ex	1 of 33	1	CRI 22

The other cards of this Pokémon

Two cards of the same Pokémon can be worth wildly different amounts — it depends on the set, the rarity and the artwork. We put all 39 Greninja cards on one page, priciest first.

See every Greninja card and its price