# Wario Land 4: a matching US/EU and Japanese GBA decompilation

> Wario Land 4 reconstructs source for the US/EU and Japanese GBA releases and builds ROMs from user-supplied originals. The author reports C equivalents for all functions while some assembly sites remain; the build uses agbcc and checks its output against version-specific MD5 hashes.

- 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/TsilaAllaoui/warioland4>
- Primary source: <https://github.com/TsilaAllaoui/warioland4/blob/a8f2557af5dd07e8fb2bed9d6e09254d66a13690/README.md>
- Catalog page: <https://awesomerea.org/resources/tsilaallaoui-warioland4-case/>
- Record JSON: <https://awesomerea.org/resources/tsilaallaoui-warioland4-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/tsilaallaoui-warioland4-case/index.md)

## Requirements & limits

- **Prerequisites:** A matching US/EU or Japanese Wario Land 4 ROM for asset extraction.
- **Prerequisites:** binutils-arm-none-eabi, clang-format, Python 3 and the agbcc submodule.
- **Limits:** Some assembly sites remain despite the author's reported complete function-level C coverage.
- **License:** No licence file in the repository.

## Primary sources

1. <https://github.com/TsilaAllaoui/warioland4/blob/a8f2557af5dd07e8fb2bed9d6e09254d66a13690/README.md>
2. <https://github.com/TsilaAllaoui/warioland4/blob/a8f2557af5dd07e8fb2bed9d6e09254d66a13690/Makefile>

## More in Games

- [Wario Land 4: rebuilding US/EU and Japanese GBA ROMs](https://awesomerea.org/resources/wario-land-4-decomp-case/index.md) · Case study
- [wc2-re: a matching Wing Commander II reconstruction and SDL2 port](https://awesomerea.org/resources/wc2-re-case/index.md) · Case study
- [WCW Nitro: a checksum-checked PlayStation decompilation](https://awesomerea.org/resources/wcw-nitro-decomp-case/index.md) · Case study
- [Whippy: matching decompilation of Kirby's Return to Dream Land](https://awesomerea.org/resources/whippy-kirby-return-to-dream-land-case/index.md) · Case study
- [wii-ipl: a decompilation of the Wii Menu (System Menu 4.3)](https://awesomerea.org/resources/wii-menu-ipl-decomp-case/index.md) · Case study
- [Winning Eleven 3 Final Ver.: a matching PlayStation reconstruction](https://awesomerea.org/resources/winning-eleven-3-final-ver-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.