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Pokémon Emerald: Johto Edition
By riddley
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Authorriddley
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Game Description
A complete Emerald ROM hack based on the pokeemerald-expansion decompilation, where original game Pokémon have been replaced with those from the Johto region (Generations 1 and 2) alongside their cross-generational evolutions, creating a refreshed experience while maintaining the core feel and difficulty curve of a mainline Gen 3 game.
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Original Creator
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https://www.pokecommunity.com/threads/pokemon-emerald-johto-edition-version-1-1.527870/
Project Version 1.1 (23/07/2026) - Complete full-game release covering the entire Emerald storyline, Hoenn League, updated Battle Frontier, and post-game content.
Key Features
Johto Pokedex replacementAll non-legendary Pokémon from Gen 1 and 2 (Bulbasaur to Celebi) replace Hoenn Pokémon, along with cross-generational evolutions and pre-evolutions added in Gen 3 through Gen 9 (e.g., Leafeon, Magnezone, Kleavor).
Thoughtful habitat placementPokémon are placed in wild encounters and trainer battles according to logic, flavor, and difficulty progression.
Story legendary retentionKyogre, Groudon, Rayquaza, and the Regi-trio retain their roles in the storyline in place of Gen 1 and 2 legendaries.
Updated battle mechanicsFeatures the Physical/Special split, Fairy type, updated damage calculations, and Generation 9 learnsets with updated typings.
Full day and night cycleVisible in the overworld, with different wild Pokémon encounters appearing depending on whether it is day or night.
HM move combat rebalancesCut is now a 40 BP Bug move; Flash is a 65 BP Fairy move; Rock Smash is a 40 BP Fighting move; Strength is a 40 BP move that raises Attack.
PokéCenter HM move deletersAn HM move deleter is present in every PokéCenter next to the PC for easy move management.
Trade evolution itemsTrade evolutions can be triggered using the Linking Cord, and trade-evolution items (like Metal Coat) can be used directly from the bag like evolution stones.
Reusable TMs and extra TMsTMs are fully reusable, and 3 additional TMs for Ice Punch, Thunder Punch, and Fire Punch are available at the Mauville Game Corner.
Reusable move tutorsMove tutors can be reused for a fee after the initial free visit.
Starter Pokémon movepool tweaksCustomized starter learnsets, such as the Totodile line learning Aqua Jet, Aqua Cutter, and Wave Crash, and Chikorita learning Growth.
Badge-scaled move relearnerThe move relearner adjusts available moves to teach based on your current badge count to complement Gen 9 learnsets.
Optional Johto Gym Leader battlesTake on optional battles against Johto Gym Leaders (unlocked by defeating Bugsy in Petalburg Woods) for extra challenge.
Post-game regional formesRegional formes of Gen 1 and Gen 2 Pokémon become available during the post-game.
Updated Battle Frontier and TentsBattle Tents and Battle Frontier facilities are updated to utilize valid Gen 1 and Gen 2 Pokémon.
Ability-changing itemsAbility Capsules (2 total) and Ability Patches (2 total) are obtainable via in-game puzzles and challenges.
Quality-of-life enhancementsIncludes an HGSS-style Pokédex, nature colors, Gen 5+ Repel system, updated overworld sprites, and running indoors.
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