Pokemon Mystique

“Pokemon Mystique” is a GBA Rom Hack made by mils. Investigate strange weather, battle wild Pokemon, and uncover a mystery in this short, story-driven fan game.

Pokemon Mystique GBA Rom Hack

• Creator: mils
• Base ROM: Emerald
• Language: English
• Released on: August 11, 2025
• Latest Version: v1.1
• Last Updated on: August 18, 2025
• Status: In Development

Also Check Out: Pokemon Voyager Battle Frontier

Description

You’re a Weather Institute member sent to the Eienn region, where the weather’s been acting really strange. Your job? Figure out what’s going on, fight off wild Pokemon going crazy, solve the mystery, and try to fix things before it gets worse.

⚠️ Heads-up:
This game includes a story detail from the Pokemon Horizons anime. If you’re avoiding spoilers, wait until you’ve seen the Mega Voltage arc (the one with Ult and Lucario). That part hasn’t been dubbed yet.

Features

• A mix of Pokemon from all generations, with weather effects like harsh sunlight and hail fully shown off.
• Your boss gives you a bunch of starter Pokemon — check your PC box as soon as you can.
• Time-based evolutions don’t rely on real time anymore. Use a Sun Shard or Moon Shard to evolve Pokemon like Eevee into Espeon or Umbreon.
• Comes with a Gen 6–style EXP Share — it’s off by default, but can be toggled from the Key Items menu
• You can nickname any Pokemon straight from the party menu — even traded ones.
• Free move relearner and move deleter available in the very first town.
• All trade evolutions are now fully tradeless
• Specialty shops offer all Poke Balls, evolution stones, and berries for easy access.
• Includes most (if not all) of the comfort features from the Pokemon Emerald Expansion, like the physical/special split.

General Notes:

• Some trainers can be rebattled.
• They won’t walk up to you or notice you from a distance — line-of-sight is disabled on purpose to avoid bugs with regular trainer battles.

What’s new – Changelogs

Version 1.1 – Final Game Jam Build

• Consolidated the tileset, which fixed tileset animations and some graphical issues
• Tweaked the layout of Brume Parkway, including adjustments to hidden item areas
• Made a custom texture for the beach towels in Estiview
• Added some new trainers to Estiview Meadow
• You can no longer run from boss battles (fixes a related bug)
• Added a new cutscene trigger
• Note for old saves: If things look off after loading, try leaving and re-entering the area to refresh visuals

Version 1.0.2

• Fixed various bugs related to cutscenes, dialogue, collision, and general gameplay
• You now start the game with a Gen 6–style EXP Share (off by default)
  • It can be toggled on/off from the Key Items menu
  • If you’re using an older save file, talk to the woman in the greenhouse to receive one

Version 1.0.1

• Fixed the title screen palette
• All trade evolutions are now fully tradeless (yes, you can finally evolve that Porygon2)
• Castform now changes forms in the overworld based on the weather
• Made a few minor tweaks and polish adjustments

Game Related Stuff

Download Pokemon Mystique

Screenshots

Credits

Made by: Mils (eevee-expo) / Millaren (pokecommunity)
Most assets were made by Game Freak or the Pokeemerald Expansion Contributors!