Pokemon Cosmic

Pokemon Cosmic GBA

Download Pre-Patched Pokemon Cosmic GBA ROM Hack

  • Creator: Pyxal
  • Version: Beta v0.0 [Hotfix]
  • Hack of: FireRed
  • Released: May 29, 2024
  • Progress: Goes up till after the first Gym (and a little bit beyond that)

Pokemon Big Blue is a GBA ROM Hack by Pyxal based on Pokemon Fire Red in English. And it is now available to download. It was released on May 29, 2024.

Also, be sure to check out Pokemon Spork Episode 8: Smoothie


You’re finally fifteen years old! Ready to begin your journey in the Astronia region, Professor Almond, an acclaimed Pokémon Professor and astronomer who has recently moved to your town, assigns you an errand. However, you quickly become the target of an organization known as “The Rosé Order” and are dangerously involved in their activities for unknown reasons. What is their goal, and why are you so mysteriously involved?

In Pokémon Cosmic Version, you’ll travel through the multi-terrain Astronia region, meet long-term companions, battle Pokémon from various regions, stop The Rosé Orders’ ultimate plan, and save the entire world from an unknown threat.

Features (red features are for future releases)

  • A New World
    • Travel through the beautiful region of Astronia and explore it’s many secrets! Connect with people and Pokémon alike and make friends and foes along the way! A new interactive world with a new feel!
  • A Powerful Engine
    • Utilizing the Complete FireRed Upgrade (same engine as that of Pokémon Unbound), the core of the game has been extensively upgraded! Battle with mechanics now on par with Generation VIII (all the attacks and abilities, Mega EvolutionZ-Moves), use many new items up till Generation VIII (standard items, berries, TM’s, HM’s), and enjoy many new significant features (vastly improved AI system, DexNav, etc.)!
  • Catch ‘Em All With Regional Variants
    • While catching all your favorite Pokémon from Kanto, Johto, Hoenn, Sinnoh, Unova, Kalos, Alola, Galar, and Paldea, don’t miss out on the new regional variants of the Astronia region, dubbed Astronian Pokémon!
  • Fresh Graphics
    • A fresher and more appealing look to the entire game while incorporating the look of vanilla FireRed! Travel through serene locations and routes in either day or night, battle with Trainers and Pokémon with both having an updated look, and utilize the cleaner UI! Small changes include a new font, new overworld sprites, updated animations, and much more!
  • Dynamic Quest System
    • A brand new quest system that rewards you for all your different endeavors and adventures! Complete each and every quest to earn the Hero Badge on your Trainer Card!
  • Collectibles
    • Travel through Astronia and locate all of the many different collectibles for unique rewards! Collect every collectible to earn the Seeker Badge on your Trainer Card!
  • Brand New OST
    • Have fun listening to updated songs and enjoy new music with some familiar and some entirely different OST’s!
  • Quality Of Life
    • Expanded Pokémon Storage System Boxes (up to twenty-five!), updated pickup mechanics and an updated day-care system, the re-use repel prompt, battle terrain, inverse/sky battles, Totem Pokémon, auto-run and others!


~click to expand/collapse~


Useful Stuff

Join the Pokémon Cosmic Version Discord server to see unreleased updates, exclusive screenshots, and much more!



  • Skeli and ghoulslash (and all contributors) – The Complete FireRed Upgrade + Dynamic Pokémon Expansion)
  • Squeetz – Music ROM base
  • Pokémon Orange Version – Sprites
  • Lunos / Kiy / usigusom / () / 黒インク – Party Screen Patches
  • DoesntKnowHowToPlay – Displaying IV’s on the stat screen
  • Spherical Ice – Sideways Stairs routine, Nature-affected stats coloring routines
  • Prof. Leon Dias – Part of his engine
  • pret – pokefirered decompilation
  • Jambo51 – Overworld Rival naming routine
  • igorfs10 – Battle backgrounds
  • SailorVicious – Tiles
  • Hek – Tiles
  • aveontrainer – Tiles
  • Fanking Omega – Tiles
  • Thrace – Tiles
  • Ekat – Tiles
  • Vurtax – Tiles
  • Heartlessdragoon – Tiles
  • Tool creators – All the tools used for the making of this hack
  • Public tileset creators – Tiles and tilesets
  • Public sprite creators – Sprites

Special Thanks

  • Skeli, who has been an amazing inspiration, for creating the CFRU, and always answering any of my questions
  • Spherical Ice and Thrace, who both also have been an inspiration for me
  • STikER, for helping me a lot, and being a really good friend in general