Case study

Wario Land 4: rebuilding US/EU and Japanese GBA ROMs

Wario Land 4 is an unfinished GBA decompilation that builds US/EU and Japanese ROM versions from source and assets extracted from the user's base ROM. Its build uses agbcc, ARM binutils and Python tooling, and reports a checksum result for the output.

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: 13
Last commit: 2026-07-17
Language: Assembly
License (GitHub): MIT

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: Provide the corresponding Wario Land 4 base ROM; the US build expects baserom_us.gba.
Prerequisites: Install binutils-arm-none-eabi, clang-format and Python 3, and initialize the agbcc submodule.
Limits: The decompilation is work in progress.
License: MIT License.

Cite

BibTeX

@misc{wario-land-4-decomp-case,
  title = {{Wario Land 4: rebuilding US/EU and Japanese GBA ROMs}},
  howpublished = {\url{https://github.com/lilDavid/warioland4}},
  url = {https://github.com/lilDavid/warioland4},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/wario-land-4-decomp-case/}}
}

Plain text

Wario Land 4: rebuilding US/EU and Japanese GBA ROMs. https://github.com/lilDavid/warioland4 (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/wario-land-4-decomp-case/

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About this entry

The description was reviewed against primary sources.

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Primary sources

README.md GitHub · lilDavid/warioland4 · Revision abb7800
Makefile GitHub · lilDavid/warioland4 · Revision abb7800
LICENSE GitHub · lilDavid/warioland4 · Revision abb7800