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[ARTICLE · art-156017] src=reversedwithai.com ↗ pub= topic=ai-tools verified=true sentiment=· neutral

Pokémon Sovereign Platinum: Pokémon Sovereign Platinum

A developer has released Pokémon Sovereign Platinum, a ROM hack of Pokémon Platinum rebuilt from the pret/pokeplatinum decompilation that expands the game to all 1025 Pokémon and adds Mega Evolution, Primal Reversion and battle rules from Pokémon Champions, with Claude Opus 5.5 credited as a co-author on engine and script contributions. The project uses a source-based workflow in which YAML/CSV design data generates engine tables and documentation, and is distributed as .xdelta patches for clean US Pokémon Platinum ROMs. Species expansion and quality-of-life features are built and verified in the emulator, while Mega Evolution and some story elements remain in planning or development, and no independent confirmation of the result was reported.

by read2 min views1 publishedOct 23, 2026
Pokémon Sovereign Platinum: Pokémon Sovereign Platinum
Image: Reversedwithai (auto-discovered)

Evidence at a glance #

Based on the linked sources. The author's reported result and independent confirmation are separate checks.

  • AI involvement
  • Reported models: Claude. Tools: pret/pokeplatinum, xdelta3, py-desmume. The writeup below describes the work attributed to AI.
  • Reported result
  • Research. This is the directory's source-based outcome classification.
  • Independent confirmation
  • Not reported.
  • Human work and limitations
  • The project is a work-in-progress decompilation-based ROM hack. It explicitly uses AI (Claude Opus 5.5) for co-authoring code, logic implementation, and documentation updates as evidenced by commit messages and the CLAUDE_STATUS log.

Original sources

What was done #

Pokémon Sovereign Platinum is a ROM hack of Pokémon Platinum rebuilt from the pret/pokeplatinum decompilation. It expands the game to include all 1025 Pokémon, new battle mechanics, and a custom story, with development tracked via engine-level documentation and logs.

Pokémon Sovereign Platinum is a ROM hack of Pokémon Platinum, developed by rebuilding the game from the pret/pokeplatinum decompilation. The project aims to integrate all 1025 Pokémon species, Mega Evolution, Primal Reversion, and updated battle rules from Pokémon Champions. While core features like species expansion and quality-of-life improvements are built and verified in the emulator, other components such as Mega Evolution and specific story elements remain in the planning or development stages. The repository utilizes a source-based workflow where design data in YAML/CSV formats is used to generate engine tables and documentation. The project credits Claude Opus 5.5 as a co-author for various engine and script contributions, including the implementation of Totem trials, Galactic gate logic, and move effects. Development progress, including findings from AI-assisted trainer AI reviews for doubles and Gen IX mechanics, is tracked in project-specific logs and changelogs. The project is distributed as .xdelta patches for clean US Pokémon Platinum ROMs.

Reproduce it #

Clone the repository and follow the build instructions in decomp/INSTALL.md to install dependencies (bison, flex, g++, gcc-arm-none-eabi, make, ninja-build, pkg-config, wget, python3, xz-utils, nasm, libc6:i386, libpng-dev). Run 'make -C decomp rom' to build the ROM from source.
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