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Pokémon Romhack Base, based off pret's pokeemerald decompilation. See the wiki for more info.
17,935 Commits 10 Branches 64 Tags 1 GiB
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Assembly 14.7%
C++ 2.3%
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Replace all usages of lz compression with smol (#7032) 
Co-authored-by: Hedara <hedara90@gmail.com>
2025-05-31 19:47:54 +02:00
.github Expansion 1.12.0 2025-05-30 20:53:32 +02:00
asm Refactors Final Gambit + Tests (#7005) 2025-05-31 15:52:53 +02:00
constants Arbitrary trainer scripts + map script/trigger softlock prevention (#5033) 2025-01-08 10:27:00 +00:00
data Refactors Final Gambit + Tests (#7005) 2025-05-31 15:52:53 +02:00
dev_scripts Renamed folders and symbols to match species defines (#5581) 2024-10-27 20:15:11 +01:00
docs AI: Add AI_SMART_TERA flag to make smarter decisions about when to terastalize. (#6705) 2025-05-31 09:47:25 +02:00
graphics Merge branch 'master' into master-upcoming 2025-05-22 15:41:08 +02:00
include Refactors Final Gambit + Tests (#7005) 2025-05-31 15:52:53 +02:00
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 Merge branch 'master' of https://github.com/pret/pokeemerald into pretmerge10apr 2025-04-10 23:57:57 +02:00
src Replace all usages of lz compression with smol (#7032) 2025-05-31 19:47:54 +02:00
test Refactors Final Gambit + Tests (#7005) 2025-05-31 15:52:53 +02:00
tools Replace all usages of lz compression with smol (#7032) 2025-05-31 19:47:54 +02:00
.all-contributorsrc add surskitty as a contributor for code (#6924) 2025-05-20 06:25:26 -07:00
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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
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
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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
CONTRIBUTING.md Updated CONTRIBUTING.md and Merge Freeze definition (#6952) 2025-05-22 09:29:13 +02:00
CREDITS.md add surskitty as a contributor for code (#6924) 2025-05-20 06:25:26 -07:00
FEATURES.md Add CREDITS.md & FEATURES.md, rewrite README.md & INSTALL.md (#6700) 2025-05-17 19:33:22 +02:00
graphics_file_rules.mk Merge remote-tracking branch 'pret/master' into new-pret-merge 2025-04-29 20:27:33 +02:00
INSTALL.md Add CREDITS.md & FEATURES.md, rewrite README.md & INSTALL.md (#6700) 2025-05-17 19:33:22 +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 Removed all instances of gflib from ld_scripts 2024-10-16 09:44:48 -03:00
ld_script_test.ld Initialize m4a and IRQ handler in a loaded section (#5912) 2025-01-02 15:11:32 +01:00
make_tools.mk New sprite compressor (#5627) 2025-05-30 23:10:54 +02:00
Makefile New sprite compressor (#5627) 2025-05-30 23:10:54 +02:00
map_data_rules.mk Merge commit '07c897a' into pret-merge 2025-05-27 19:46:13 +02:00
README.md Expansion 1.12.0 2025-05-30 20:53:32 +02:00
rom.sha1 Make rom.sha1 lowercase to fix erroneous comparison results on *nix 2017-09-06 09:20:49 -04:00
spritesheet_rules.mk Add Mega Evo, Primal Reversion, and Ultra Necrozma OW sprites (#5874) 2025-01-30 22:29:20 -03:00

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, 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 1.12.0 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!