For the technically curious, here is exactly what the does to the game file.
The ability to listen to the game's soundtrack was deleted.
A popular 3DS emulator that allows for upscaled graphics and quick saves. Conclusion
Features like Duelist Profiles, ending pictures, and photos were removed. Voice Acting:
: While much of the game is playable, some finer details—such as specific duelist profiles and deep flavor text—are still undergoing refinement by various translation teams. Release Forecast
But thanks to recent fan translation efforts, we can finally experience the game as it was meant to be. Here is the lowdown on the current English patch work that is restoring this lost content. What the English Patch Restores
Some title cards or specific Japanese-textured assets may remain in Japanese.
Unlockable character galleries, ending illustrations, and custom device backgrounds were removed.
: Test your patch thoroughly to ensure there are no errors, such as incorrect character display, wrong card effects, or game crashes.