Pokémon Romhack Base, based off pret's pokeemerald decompilation. See the wiki for more info.
Go to file
2025-07-07 10:24:45 -10:00
.github master to upcoming merge 2025-07-02 10:05:31 +02:00
asm Refactor move Synchronise (#7271) 2025-07-07 13:36:21 -04:00
constants Arbitrary trainer scripts + map script/trigger softlock prevention (#5033) 2025-01-08 10:27:00 +00:00
data Refactor move Synchronise (#7271) 2025-07-07 13:36:21 -04:00
dev_scripts Renamed folders and symbols to match species defines (#5581) 2024-10-27 20:15:11 +01:00
docs master to upcoming merge 2025-07-02 10:05:31 +02:00
graphics added Ash Greninja overworld sprites (#6976) 2025-06-07 09:57:43 +02:00
include Add making release build 2025-07-07 10:24:45 -10:00
libagbsyscall Fix $(AR) define, remove \u warns on macOS. 2021-01-04 11:35:59 -05:00
migration_scripts New sprite compressor (#5627) 2025-05-30 23:10:54 +02:00
sound Add config options for removing bard phoneme audio to save ROM space (#7155) 2025-06-18 20:16:25 -07:00
src Refactor move Synchronise (#7271) 2025-07-07 13:36:21 -04:00
test Refactor move Synchronise (#7271) 2025-07-07 13:36:21 -04:00
tools Improve smol compressor (#7073) 2025-06-09 18:28:00 +02:00
.all-contributorsrc add pablopenna as a contributor for code (#7202) 2025-06-23 19:13:50 -07:00
.gitattributes Add missing files to .gitattributes. 2020-11-08 20:13:21 -05:00
.gitignore Update .gitignore to add heal locations (#7050) 2025-06-25 20:13:29 +02:00
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
build_tools.sh Update deprecated build_tools script 2019-08-27 09:15:44 -04:00
CHANGELOG.md Version 1.10.2 (#6144) 2025-01-30 18:38:28 -03:00
charmap.txt Fixes instances of battler mutation for abilities (#7250) 2025-07-01 19:48:12 +02:00
check_history.sh feat: check if inside of git repository before building (#4363) 2024-04-07 10:43:04 -04:00
config.mk Add making release build 2025-07-07 10:24:45 -10:00
CONTRIBUTING.md Updated CONTRIBUTING.md and Merge Freeze definition (#6952) 2025-05-22 09:29:13 +02:00
CREDITS.md add pablopenna as a contributor for code (#7202) 2025-06-23 19:13:50 -07:00
FEATURES.md Spruce up FEATURES.md (#7159) 2025-06-20 05:44:55 -07:00
graphics_file_rules.mk Merge remote-tracking branch 'pret/master' into new-pret-merge 2025-04-29 20:27:33 +02:00
INSTALL.md Fix typo in INSTALL.md (#7116) 2025-06-14 14:29:09 +02:00
json_data_rules.mk Merge branch 'master' into master-to-upcoming 2025-05-28 14:26:15 +02:00
ld_script_modern.ld Keep removed headers (#7261) 2025-07-02 09:06:23 +02:00
ld_script_test.ld Keep removed headers (#7261) 2025-07-02 09:06:23 +02:00
make_tools.mk New sprite compressor (#5627) 2025-05-30 23:10:54 +02:00
Makefile Add making release build 2025-07-07 10:24:45 -10:00
map_data_rules.mk Merge commit '07c897a' into pret-merge 2025-05-27 19:46:13 +02:00
README.md 1.12.1 Release commit 2025-06-30 11:01:13 +02:00
remove_terrain.log Fixes Ice Spinner and Steel Roller (#7259) 2025-07-01 15:39:22 +01:00
rom.sha1 Make rom.sha1 lowercase to fix erroneous comparison results on *nix 2017-09-06 09:20:49 -04:00
spritesheet_rules.mk added Ash Greninja overworld sprites (#6976) 2025-06-07 09:57:43 +02:00

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, Pokemon 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 Pokemon battle mechanics happening in the pokeemerald-expansion engine: 2 vs 1 battles, modern Pokemon, 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 featues 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 1.12.1 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 on 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!