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Pokémon Romhack Base, based off pret's pokeemerald decompilation. See the wiki for more info.
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Alex 073fe375a3
 Tests for Max Moves already exist (#8314)
2025-11-21 22:13:54 -08:00
.github Adjust label workflow to only run if PR is approved (#8183) 2025-11-09 22:21:55 +01:00
asm Fixes Neutralizing Gas displaying message when exiting with multiple users (#8318) 2025-11-21 19:58:02 +01:00
constants Arbitrary trainer scripts + map script/trigger softlock prevention (#5033) 2025-01-08 10:27:00 +00:00
data Fixes Neutralizing Gas displaying message when exiting with multiple users (#8318) 2025-11-21 19:58:02 +01:00
dev_scripts Renamed folders and symbols to match species defines (#5581) 2024-10-27 20:15:11 +01:00
docs Fix wrongly renamed logs (#8264) 2025-11-16 14:08:00 +01:00
graphics Make rainbow effect anim change based on side (#8269) 2025-11-18 23:31:47 +01:00
include Fix tossing items applying to the wrong stack (#8282) 2025-11-21 22:13:15 -08:00
libagbsyscall Fix $(AR) define, remove \u warns on macOS. 2021-01-04 11:35:59 -05:00
migration_scripts Adds conversion script for trainers.h (#7663) 2025-09-30 17:48:23 +02:00
sound pret merge 2025-11-16 12:01:13 +01:00
src Fix tossing items applying to the wrong stack (#8282) 2025-11-21 22:13:15 -08:00
test Tests for Max Moves already exist (#8314) 2025-11-21 22:13:54 -08:00
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asmdiff.ps1 Remove debug printing 2019-04-07 19:18:42 -05:00
asmdiff.sh Pret merge (20th of June) (#4845) 2024-06-21 12:21:29 +02:00
audio_rules.mk Low Health Beeps Configuration (#6328) 2025-03-15 22:02:48 -07:00
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CHANGELOG.md Version 1.10.2 (#6144) 2025-01-30 18:38:28 -03:00
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check_history.sh feat: check if inside of git repository before building (#4363) 2024-04-07 10:43:04 -04:00
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CREDITS.md add leo60228 as a contributor for doc, and data (#8238) 2025-11-12 13:45:36 -08:00
FEATURES.md Spruce up FEATURES.md (#7159) 2025-06-20 05:44:55 -07:00
graphics_file_rules.mk Fix spritesheet rules for rayquaza sprite in cutscene (#7985) 2025-10-20 15:56:55 +02:00
INSTALL.md Update INSTALL.md (#7852) 2025-10-06 17:05:46 -07:00
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ld_script_modern.ld Keep removed headers (#7261) 2025-07-02 09:06:23 +02:00
ld_script_test.ld Fix EWRAM_INIT in tests and add a default state to test runner main loop 2025-09-06 18:20:45 +02:00
make_tools.mk 11/08/25 Master to upcoming merge 2025-08-11 08:31:12 +02:00
Makefile Adds an auto-generated include file of script commands (#8156) 2025-11-06 21:10:42 -08:00
map_data_rules.mk Merge commit '07c897a' into pret-merge 2025-05-27 19:46:13 +02:00
README.md 1.13.3 release version 2025-11-01 21:51:06 +01:00
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spritesheet_rules.mk Merge commit 'd1d5435487' into pret-merge 2025-11-01 15:13:16 +01:00
trainer_rules.mk Remove competitive syntax config (#7154) 2025-07-12 13:03:36 -07:00

README.md

About pokeemerald-expansion

Gif that shows debugging functionality that is unique to pokeemerald-expansion such as rerolling Trainer ID, Cheat Start, PC from Debug Menu, Debug PC Fill, Pokémon Sprite Visualizer, Debug Warp to Map, and Battle Debug Menu Gif that shows overworld functionality that is unique to pokeemerald-expansion such as indoor running, BW2 style map popups, overworld followers, DNA Splicers, Gen 1 style fishing, OW Item descriptions, Quick Run from Battle, Use Last Ball, Wild Double Battles, and Catch from EXP Gif that shows off a number of modern Pokémon battle mechanics happening in the pokeemerald-expansion engine: 2 vs 1 battles, modern Pokémon, items, moves, abilities, fully customizable opponents and partners, Trainer Slides, and generational gimmicks

pokeemerald-expansion is a GBA ROM hack base that equips developers with a comprehensive toolkit for creating Pokémon ROM hacks. pokeemerald-expansion is built on top of pret's pokeemerald decompilation project. It is not a playable Pokémon game on its own.

Features

pokeemerald-expansion offers hundreds of features from various core series Pokémon games, along with popular quality-of-life enhancements designed to streamline development and improve the player experience. A full list of those features can be found in FEATURES.md.

Credits

If you use pokeemerald-expansion, please credit RHH (Rom Hacking Hideout). Optionally, include the version number for clarity.

Based off RHH's pokeemerald-expansion 1.13.3 https://github.com/rh-hideout/pokeemerald-expansion/

Please consider crediting all contributors involved in the project!

Choosing pokeemerald or pokeemerald-expansion

  • pokeemerald-expansion supports multiplayer functionality with other games built on pokeemerald-expansion. It is not compatible with official Pokémon games.
  • If compatibility with official games is important, use pokeemerald. Otherwise, we recommend using pokeemerald-expansion.
  • pokeemerald-expansion incorporates regular updates from pokeemerald, including bug fixes and documentation improvements.

Getting Started

❗❗ Important: Do not use GitHub's "Download Zip" option as it will not include commit history. This is necessary if you want to update or merge other feature branches.

If you're new to git and GitHub, Team Aqua's Asset Repo has a guide to forking and cloning the repository. Then you can follow one of the following guides:

📥 Installing pokeemerald-expansion

🏗️ Building pokeemerald-expansion

🚚 Migrating from pokeemerald

🚀 Updating pokeemerald-expansion

Documentation

For detailed documentation, visit the pokeemerald-expansion documentation page.

Contributions

If you are looking to report a bug, open a pull request, or request a feature, our CONTRIBUTING.md has guides for each.

Community

Our community uses the ROM Hacking Hideout (RHH) Discord server to communicate and organize. Most of our discussions take place there, and we welcome anybody to join us!