Case study

Sonic Battle: a matching GBA decompilation

Sonic Battle decomp reconstructs the USA Rev 0 Game Boy Advance game as matching C and assembly. Its build checks the user's ROM hash, compiles recovered code with agbcc and compares a linked whole-ROM image with the original. The author reports 51.81% of executable text decompiled to C; handwritten assembly accounts for additional reproduced bytes.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C2 code & docs, no demo or download

Stars: 0
Last commit: 2026-08-23
Language: C

GitHub data as of 2026-11-10

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Evidence

Observed: Code and documentation observed; no download method or demo found.
Checked: 2026-11-09

How evidence classes are assigned

Requirements & limits

Prerequisites: A USA Rev 0 Sonic Battle ROM matching the documented SHA-1 is required.
Prerequisites: Python 3, ARM binutils and the pinned agbcc toolchain are required.
Limits: The author estimates that some executable code cannot be matched as C.
License: No licence file in the repository.

Cite

BibTeX

@misc{sonic-battle-decomp-case,
  title = {{Sonic Battle: a matching GBA decompilation}},
  howpublished = {\url{https://github.com/nicklesimba/sonic-battle-decomp}},
  url = {https://github.com/nicklesimba/sonic-battle-decomp},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/sonic-battle-decomp-case/}}
}

Plain text

Sonic Battle: a matching GBA decompilation. https://github.com/nicklesimba/sonic-battle-decomp (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/sonic-battle-decomp-case/

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Primary sources

README.md GitHub · nicklesimba/sonic-battle-decomp · Revision d150f0d
decomp/README.md GitHub · nicklesimba/sonic-battle-decomp · Revision d150f0d