Diancie's attack was corrected right before the World Championships
The Pokemon Company International has changed how Diancie's Diffuse Reflection attack works. The new wording counts Special Energy on your opponent's Pokemon, and it is in effect now.
The Pokemon Company International has corrected a card eight days before the world championship. The card is Diancie from the Stellar Crown set, and its attack now does something different from what is printed on it.
The new text for the Diffuse Reflection attack reads: "This attack does 40 damage for each Special Energy card attached to all of your opponent's Pokemon." That wording is in effect immediately. PokeBeach reports the printed card did not match what the designers meant, and that the attack was always supposed to count the Special Energy on your opponent's side.
What an errata is
An errata is an official correction to a card that has already been printed. The Pokemon Company International publishes the right wording instead of reprinting the card, and judges at official events treat the new wording as the real rule.
You do not need to throw your copy away or buy a new one. The card in your binder is still legal. It simply does what the correction says, not what the picture says. If you play at a shop or a tournament, keep a note of the new text on your phone. It saves an argument.
Special Energy, in plain English
Energy cards pay for attacks. Most are Basic Energy, which do nothing except pay that cost. Special Energy cards do a second job on top: extra damage, a cheaper retreat, protection from an effect. Most strong decks run a few of them.
Diffuse Reflection punishes exactly that. It looks at the Special Energy your opponent has in play and hits for 40 damage per card. Two of them is 80 damage. Four is 160, which knocks out a lot of Pokemon in one go.
So Diancie is a counter card. It is not something you build a deck around. It is something you keep in the back pocket because a popular deck across the table is stacking Special Energy and cannot stop doing it.
Why the timing matters
The 2026 Pokemon World Championships run August 28 to 30 in San Francisco. Players lock in their decks after weeks of testing. A card changing its text this close to the tournament is not a quiet housekeeping note for them.
Two groups care. Anyone planning to bring Diancie now knows precisely what it counts, which removes a judge call they might have lost. Anyone building a deck that leans on Special Energy has one more reason to check how much of it they leave sitting on the board.
Getting the correction out before the event is the right call, and it is why it landed now rather than in September. A rules question settled in advance is a question nobody has to settle mid-match with a title on the line.
What we do not know
The report we have does not spell out the old wording in full, so we are not going to guess at it. The useful part is the new text, and that is above, word for word.
We also do not know whether this changes anything about which decks people bring. Deck lists from the top tables usually surface within hours of the tournament ending, and that is when the answer arrives. Until then, treat any claim about Diancie showing up at Worlds as a guess.
One thing worth remembering as a general rule: a card's current text always beats the text on the cardboard. Errata are rare, but they stick, and the official card database is the place they get recorded.