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## How to update
- If you haven't set up a remote, run the command `git remote add RHH https://github.com/rh-hideout/pokeemerald-expansion`.
- Once you have your remote set up, run the command `git pull RHH expansion/1.15.1
`.

🧬 General 🧬

Changed

  • Make trainerproc-generated files depend on trainerproc by @rayrobdod in #9414
  • Update event_objects.h hex values by @shachar700 in #9418
  • Remove need to run make clean when switching between frlg and emerald by @grintoul1 in #9406
  • Parallelize CI jobs and cache build tools by @TrevorEdris in #9528
  • fix(preproc): Remove unused private field m_scriptData by @lhearachel in #9581
  • fix(learnset_helpers): Harden regex-patterns for preproc directives by @lhearachel in #9582
  • Silence Makefile map_version message by @grintoul1 in #9590
  • docs: added note about BoxPokemon encryption works test by @pkmnsnfrn in #9619
  • Pret merge (29th of March, 2026) by @hedara90 in #9658

Fixed

  • Fix FRLG party menu Oak support message window by @montmoguri in #9412
  • Fix free match call compile fail by @FosterProgramming in #9416
  • Fix GetSpeciesPreEvolution triggering assertf with disabled species by @hedara90 in #9455
  • Adds missing include in intro_frlg.c by @grintoul1 in #9483
  • Fix battle type doubles for debug battle by @FosterProgramming in #9486
  • Fix trailing newline failing tests by @cawtds in #9495
  • Fix newlines not working with sprite printing by @hedara90 in #9502
  • Fix money amount printed on whiteout by @FosterProgramming in #9517
  • Fix assert hits when species are disabled by @cawtds in #9520
  • Fix Some HGSS Dex Visuals by @HashtagMarky in #9534
  • Fix assert failure on disabled species in Sprite Visualizer by @hedara90 in #9422
  • Fix FREE_ENIGMA_BERRY breaking GF Rom Header by @AsparagusEduardo in #9599
  • Fix tile allocation for unique egg and species sprite in PC by @hedara90 in #9613
  • Split region map layouts by map by @AsparagusEduardo in #9580
  • Fix flipped FakeRTC check by @hedara90 in #9597
  • Allow make release and check for FRLG by using the BUILD variable by @FosterProgramming in #9465
  • Fix dex absences for cross gen configs by @luuma in #9337
  • fix: set printer type for AddTextPrinterParameterized6 by @mudskipper13 in #9628
  • Fix all-contributors by @hedara90 in #9659

🗺️ Overworld 🗺️

Fixed

  • Fix tutor_moves.h files containing duplicates by @FosterProgramming in #9423
  • Version specific tweaks of post whiteout script by @FosterProgramming in #9521
  • Fix Berry Mutation Chance by @ghoulslash in #9530
  • Fixes debug menu Fly Flags toggle by @grintoul1 in #9607
  • Corrects music for FRLG maps and some functions by @grintoul1 in #9606
  • Fix fateful encounter starting battle with 0 hp by @FosterProgramming in #9621
  • Fix timing and structure of Apricorn Tree messages by @BluSunrize in #9650

🐉 Pokémon 🐉

Changed

  • Adds Cherrim Overworld sprite by @luuma in #9442

Fixed

  • Fix custom eggs displaying as regular eggs on Storage System by @AsparagusEduardo in #9603
  • Fix shininess of form changed battle mon after reshowing battle screen by @cawtds in #9524
  • Fixed Kanto dex cross-gen evolutions by @fdeblasio in #9617
  • Fix disabled species appearing in evolution struct by @hedara90 in #9574

⚔️ Battle General ⚔️

Changed

  • Clean unused function from header by @AsparagusEduardo in #9541
  • Fallthrough instead break after ordering by speed by @AlexOn1ine in #9633

Fixed

  • Fix ability reference in Steadfast message by @PhallenTree in #9389
  • Fixes U-turn not reseting targetsDone flag by @AlexOn1ine in #9411
  • Fix Unseen Fist triggering protection move side effects by @Cle-bit in #9428
  • Partial fix to incorrect Throat Spray behaviour, with a fix to summary_screen config that no longer works by @luuma in #9426
  • Fix ally targeting moves crashing in single battles by @PhallenTree in #9433
  • Fix weatherform change when primal weather leaves the field by @AlexOn1ine in #9424
  • Fixes Trump Card’s power calculation using its own PP when called by another move by @PhallenTree in #9445
  • Missing shouldAbilityTrigger by @AlexOn1ine in #9447
  • Fix Lightning Rod activation on fainted mon by @AlexOn1ine in #9434
  • Fixes abilities that grant type immunities not outputting battle messages by @LinathanZel in #9470
  • Fix order of failure for spread moves by @AlexOn1ine in #9472
  • Fixes Knock Off / Ogerpon behavior by @AlexOn1ine in #9478
  • Fixes Critical Hit message being printed on fixed damage moves by @AlexOn1ine in #9489
  • Fixes Secret Power Terrain effects not being applied by @PhallenTree in #9492
  • Fix various stuff not working when hitting substitutes by @hedara90 in #9487
  • Fix Magic Bounce reflecting Hazards from a semi-invulnerable position by @AlexOn1ine in #9501
  • Fixes Lock On by @AlexOn1ine in #9496
  • Fix Magic Coat activation if in Semi-Invulnerable state by @AlexOn1ine in #9503
  • Fixes Dancer original attacker/target being overwritten by @PhallenTree in #9515
  • Fix Magic Guard activation against Rough Skin by @AlexOn1ine in #9516
  • Fix visual glicth during critical capture by @FosterProgramming in #9538
  • Fix SafeguardProtected script by @AlexOn1ine in #9559
  • Fix duplicate Trick Room end message when used again by @Cle-bit in #9546
  • Fix Commander cleanup to only clear STATE_COMMANDER semi-invulnerability for partners by @Cle-bit in #9598
  • Fix Commander forced-switch blocking after swallowed Tatsugiri faints, plus Commander tests cleanup by @Cle-bit in #9609
  • Fix Mirror Move failing when the target is immune to the copied move by @Cle-bit in #9604
  • Fix Wind Power and Electromorphosis triggering before fainting and Tailwind absent-battler ability activation by @Cle-bit in #9635
  • Fixed Meteor Beam and Electro Shot being callable via Sleep Talk and Instruct by @LinathanZel in #9631
  • Fix ability history recording ownership for Infiltrator, Punk Rock, and Ice Scales by @Cle-bit in #9639
  • Fix Ability Shield interaction for Receiver and Power of Alchemy by @Cle-bit in #9649
  • Fix Gorilla Tactics Dynamax behavior by @Cle-bit in #9643

🧶 Items 🧶

Changed

  • Add better Strange Ball sprite by @kittenchilly in #9556

Fixed

  • Fix negative friendship modifiers not working properly by @FosterProgramming in #9622

🤖 Battle AI 🤖

Fixed

  • Fix missing AI handling for partnerProtecting and Well-Baked Body by @Cle-bit in #9385
  • Fix AI’s inability to use Acupressure on its ally by @Pawkkie in #9437
  • Fixes Bide’s AI scoring being boosted by being able to boost offensive stats by @PhallenTree in #9435
  • Fix for trap effect groundedness being seen incorrectly by @Meister-anon in #9396
  • Fix AI_CompareDamagingMoves reading incorrect move indexes by @Pawkkie in #9454
  • Rage fist fix by @MaximeGr00 in #9405
    • Rage Fist now sees stacks properly for switch logic.
  • Retaliate post ko bug fix by @MaximeGr00 in #9561
    • Retaliate damage is now seen correctly for both post-ko and on field damage calculations.
  • Fix AI debug timers by @Pawkkie in #9585
  • Fix AI using Yawn into Flame/Toxic Orb self-status targets by @Cle-bit in #9626

🧹 Other Cleanup 🧹

  • Update event_objects.h hex values by @shachar700 in #9418
  • Remove need to run make clean when switching between frlg and emerald by @grintoul1 in #9406
  • Clean unused function from header by @AsparagusEduardo in #9541
  • docs(tutorials): clean up mon_generation tutorial for readability by @kildemal in #9531
  • fix(preproc): Remove unused private field m_scriptData by @lhearachel in #9581
  • fix(learnset_helpers): Harden regex-patterns for preproc directives by @lhearachel in #9582
  • Silence Makefile map_version message by @grintoul1 in #9590
  • Fallthrough instead break after ordering by speed by @AlexOn1ine in #9633

🧪 Test Runner 🧪

Changed

  • Add tests for Taunt by @Cle-bit in #9386
  • PARAMETRIZE_LABEL now supports multiple args by @AsparagusEduardo in #9206
  • Parallelize CI jobs and cache build tools by @TrevorEdris in #9528
  • preproc: generate .size in script_data sections by @mrgriffin in #9233

Fixed

  • Fix partner difficulty and rework tests by @FosterProgramming in #9419
  • Fix Magic Guard activation against Rough Skin by @AlexOn1ine in #9516
  • Fix test ROM running out of space at 90%+ usage by @hedara90 in #9623
    • All mon cries in tests now use a single shared cry

📚 Documentation 📚

  • docs(tutorials): clean up mon_generation tutorial for readability by @kildemal in #9531
  • docs: added note about BoxPokemon encryption works test by @pkmnsnfrn in #9619

New Contributors

  • @TrevorEdris made their first contribution in #9528
  • @BluSunrize made their first contribution in #9650

Full Changelog: https://github.com/rh-hideout/pokeemerald-expansion/compare/expansion/1.15.0...expansion/1.15.1