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87 lines
5.9 KiB
Markdown
87 lines
5.9 KiB
Markdown
# Switch Gift Data Manager
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## About
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This tool aims to bring back past Mystery Gift event content in all Pokémon games for Nintendo Switch.
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Since these games don't allow event injection in the save file, this tool creates a forged BCAT package, which can be injected using homebrew tools like [JKSV](https://github.com/J-D-K/JKSV/releases).
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This allows wondercards to be redeemed through the in-game Mystery Gift menu. The use of this tool does not involve hacking the game ROM or modifying the game save file.
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### Compatible files
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* Let's Go Pikachu and Let's Go Eevee wondercard full files (.wb7full)
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* Sword and Shield wondercard files (.wc8)
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* Brilliant Diamond and Shining Pearl wondercard files (.wb8)
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* Legends Arceus wondercard files (.wa8)
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* Scarlet & Violet wondercard files (.wc9)
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* Legends Z-A wondercard files (.wa9)
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* BCAT wondercard files, containing either multiple or single wondercards (no file format extension)
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### Compatible games
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* Pokémon Let's Go Pikachu and Eevee
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* Pokémon Sword and Shield
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* Pokémon Brilliant Diamond and Shining Pearl
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* Pokémon Legends Arceus
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* Pokémon Scarlet and Violet
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* Pokémon Legends Z-A
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## Disclosure
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Neither I nor the Project Pokémon staff take any responsibility for possible adverse outcomes or bans resulting from the use of this tool. Use it at your own discretion.
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**N.B.:** Some BCAT files contain sensitive console-specific information that you should keep secure. Do not share your BCAT with others!
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## Usage
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This section refers to the Windows Form app. The Command Line app usage is similar and should be fairly intuitive.
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* Ensure you have the required [.NET 9.0 Desktop Runtime](https://dotnet.microsoft.com/it-it/download/dotnet/9.0) installed correctly.
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* Dump your game's BCAT with [JKSV](https://github.com/J-D-K/JKSV/releases) and keep some copies in a safe place.
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* Open the tool and select your game of choice.
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* Import the wondercard files of your choice (by drag & drop or by clicking the `Open Files` button).
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* Optionally, edit the wondercard ID (WCID) if you have duplicate WCs, then click `Apply`.
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* Click the `Save as BCAT Package` button and browse to your dumped BCAT.
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* A folder called "Forged_BCAT_{Game}" should appear next to your dumped BCAT.
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* Restore the forged BCAT using JKSV.
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* To redeem the old event gifts, open your game -> Menu -> Mystery Gift -> Redeem via Internet.
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* When you're done, restore your original BCAT package with JKSV (not doing so may cause sync issues).
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**N.B.:** BCAT sync usually occurs between 12:00 AM (UTC) and 01:00 AM (UTC). I recommend avoiding this procedure during that timeframe to prevent desynchronization.
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If you experience a desync, follow one of these methods to resync:
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* Open JKSV, select BCAT, hover over your game, press X to open the menu, then click `Reset Save Data`.
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* Download the latest BCAT for your game from [citrusbolt](https://github.com/citrusbolt)'s [website](http://citrusbolt.net/bcat/) and add the missing files to your dumped BCAT, then restore it with JKSV.
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## Support/Troubleshooting
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If you find any bugs or need support, please post in the [relevant topic on the Project Pokémon forums](https://projectpokemon.org/home/forums/topic/62491-switch-gift-data-manager-import-wondercards-into-switch-games-by-faking-bcat-packages/).
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Alternatively, feel free to contact me on my [Discord server](https://discord.gg/yWveAjKbKt).
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[<img src="https://canary.discordapp.com/api/guilds/693083823197519873/widget.png?style=banner2">](https://discord.gg/yWveAjKbKt)
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## Building
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* All Switch Gift Data Manager projects require .NET 9.0.
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* `.WinForm` is a Windows Form application and can only be built on Windows operating systems.
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* `.Core` and `.CommandLine` can be built on any platform.
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* Use the Debug build configuration when editing or developing code related to the `.WinForm` project. Build as Release only once the code is finalized.
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* To build the projects, open the `.sln` file in the root directory with an IDE such as Visual Studio 2022, then click `Build` -> `Build Solution`.
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The `.CommandLine` project is currently just a simple script that calls the `.Core` functionalities and can run on any popular OS. Feel free to improve it and/or submit a pull request if you'd like :-)
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## Credits
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* [PNZeml](https://github.com/PNZeml) for the CRC-16/CCITT-FALSE with lookup table [implementation](https://gist.github.com/tijnkooijmans/10981093?permalink_comment_id=3996072#gistcomment-3996072).
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* [kwsch](https://github.com/kwsch), [sora10pls](https://github.com/sora10pls), and all the [PKHeX](https://github.com/kwsch/PKHeX) and [pkNX](https://github.com/kwsch/pkNX) developers and contributors for various offsets and resources.
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* [PP-theSLAYER](https://github.com/PP-theSLAYER) and [pasqualenardiello](https://github.com/pasqualenardiello) for their research on the Sword & Shield fashion block and the Scarlet & Violet fashion block, respectively.
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* All the Project Pokémon staff and the [Event Gallery](https://github.com/projectpokemon/EventsGallery) contributors for their archival efforts that made this project possible.
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## License
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Copyright © 2025 Manu098vm
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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