# Fossil Fighters Champions: matching the Nintendo DS battle overlay

> Reconstructs Fossil Fighters Champions' Nintendo DS battle overlay as C compiled with the original mwccarm toolchain, retaining assembly for unmatched functions. The author reports 1,141 of 1,382 overlay functions build-verified, and the repository documents accuracy and damage behavior.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/arcnid/ffc-decomp>
- Primary source: <https://github.com/arcnid/ffc-decomp/blob/3c7a101eddf92f9976e6137872c258d56200c67f/README.md>
- Catalog page: <https://awesomerea.org/resources/fossil-fighters-champions-decomp-case/>
- Record JSON: <https://awesomerea.org/resources/fossil-fighters-champions-decomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/fossil-fighters-champions-decomp-case/index.md)

## Requirements & limits

- **Prerequisites:** A legally dumped USA Fossil Fighters Champions ROM is required.
- **Prerequisites:** macOS or Linux, make, clang, Python 3, wine, ndspy, Capstone, and mwccarm DSi 1.1 build 1018 are required.
- **Limits:** The author's reported 82.6% function match applies to overlay 2; the other modules are scaffolded.
- **License:** No licence file in the repository.

## Primary sources

1. <https://github.com/arcnid/ffc-decomp/blob/3c7a101eddf92f9976e6137872c258d56200c67f/README.md>
2. <https://github.com/arcnid/ffc-decomp/blob/3c7a101eddf92f9976e6137872c258d56200c67f/STATUS.md>

## More in Games

- [Four Swords Adventures: a byte-matching GameCube decompilation](https://awesomerea.org/resources/four-swords-adventures-decomp-case/index.md) · Case study
- [Freelancer: an in-progress Patch 1.1 decompilation](https://awesomerea.org/resources/freelancer-decomp-case/index.md) · Case study
- [Friends of Mineral Town: decompiling the US GBA release](https://awesomerea.org/resources/friends-of-mineral-town-decomp-case/index.md) · Case study
- [Frogger's Adventures: Temple of the Frog: a matching GBA decompilation](https://awesomerea.org/resources/frogger-adventures-temple-decomp-case/index.md) · Case study
- [FROGMAN: an annotated BBC Micro disassembly](https://awesomerea.org/resources/frogman-bbc-micro-case/index.md) · Case study
- [fzgx: a matching F-Zero GX decompilation](https://awesomerea.org/resources/fzgx-nkhoit-decomp-case/index.md) · Case study

## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.