If you are trying to apply a patch to a Japanese ROM, you are likely looking for the work by translation groups (often associated with the "ZEXAL World Duel Carnival Translation Project").
Restoring the Carnival: The Yu-Gi-Oh! Zexal World Duel Carnival English Patch If you ever played the official English release of Yu-Gi-Oh! Zexal World Duel Carnival yugioh zexal world duel carnival english patch work
The Yu-Gi-Oh! ZEXAL World Duel Carnival is an exciting and memorable part of the series, and English patch work has made it possible for fans worldwide to experience the thrill of the tournament. While there are challenges and limitations to consider, the benefits of English patch work far outweigh the drawbacks. Whether you're a seasoned duelist or a newcomer to the series, the World Duel Carnival is an unforgettable experience that is sure to captivate and inspire. So, gather your cards, prepare your deck, and get ready to duel your way to victory in the Yu-Gi-Oh! ZEXAL World Duel Carnival! If you are trying to apply a patch
Since the game stopped receiving updates in 2014, it only covers cards up to the Primal Origin set. Zexal World Duel Carnival The Yu-Gi-Oh
Applying the patch (typically via LayeredFS or a prepatched CIA) is straightforward if you have a modded 3DS or Citra emulator. The translation covers virtually everything : menus, card names and descriptions, dialogue, duel tutorials, and even the post-duel banter. I didn’t run into any untranslated text or crashes during my 20+ hours of play. The grammar is clean, the font fits the 3DS screen well, and the terminology matches the official TCG/English anime (e.g., “Xyz Summon” not “Overlay Summon”).