Spinda Pattern Plugin for PKHeX

A PKHeX plugin that provides an advanced editor for Spinda spot patterns with proper support for BDSP endianness handling.

About

The different spot patterns are generated based on Spinda's personality value, a hidden statistic in the Pokémon games. This value is a 32-bit number, which results in the possibility of 4,294,967,296 unique patterns (doubled if you consider also its shiny variant). So, every time you encounter a Spinda, you're meeting a truly unique Pokémon!

Features

• Visual Spinda pattern editor with real-time preview
• Support for all Pokémon generations (Gen 3+)
• BDSP Endianness Fix: Correctly handles the byte-order bug in Brilliant Diamond/Shining Pearl where Encryption Constants are read as big-endian instead of little-endian
• Shiny pattern preview
• Randomize patterns with shiny support

Screenshots

Installation

1. Download the latest SpindaPatternPlugin.dll from the Releases page
2. Place the DLL file in your PKHeX plugins folder
3. Restart PKHeX

Usage

1. Load a save file in PKHeX
2. Select a Pokémon (or an empty slot)
3. Go to Tools → Spinda Pattern Editor (or press Ctrl+Shift+S)
4. Edit the pattern using the hex input or randomize button
5. Click Apply to save changes

BDSP Bug Information

In Pokémon Brilliant Diamond and Shining Pearl, there's a bug where the game reads Spinda's Encryption Constant in reverse byte order (big-endian instead of little-endian). This plugin automatically detects BDSP Pokémon and applies the correct byte swapping to ensure patterns display correctly.

For example:

• Normal EC: 0x12345678 displays pattern based on bytes 12 34 56 78
• BDSP EC: 0x12345678 displays pattern based on bytes 78 56 34 12

Building from Source

Requirements:

• .NET 9.0 SDK
• Windows Forms support
• PKHeX.Core.dll reference

git clone https://github.com/yourusername/SpindaPatternPlugin.git
cd SpindaPatternPlugin
dotnet build -c Release

Version Compatibility

This plugin includes automatic version detection and will warn if there's a mismatch between the plugin version and your PKHeX version. The plugin is built against the PKHeX.Core.dll included in the repository.

Credits

• Pokeos for the images and positioning logic
• PKHeX developers for the plugin API
• Pokémon community (@Atrius97) for documenting the BDSP Spinda bug

License

This project is licensed under the MIT License - see the LICENSE file for details.