Pokemon Odyssey

Download Pre-Patched Pokemon Odyssey GBA ROM Hack

  • Creator: PacoScarso
  • Version: Beta 2.6
  • Hack of: FireRed
  • Updated: November 18, 2023
  • Main Story Completion: 50% (Beta v2.5 ends at the beginning of the Fifth Stratum.)
  • Language: English

Pokemon Odyssey is a GBA ROM Hack by PacoScarso based on Pokemon Fire Red. And it is now available to download. It was last updated on November 18, 2023.

Also, be sure to check out Pokemon The Fall of Heroes


Hello people! Long story short: this is a crossover project between PokémonMade in Abyss, and Etrian Odyssey. It’s a sort of dungeon-crawler story-driven.


On the island of Talrega lies the entrance to the Yggdrasil labyrinth, a gigantic desert carved from the roots of the tree of life over millennia; filled with treasures and other valuable items, it attracted explorers from everywhere. What are you looking for? Fame? Money? Or do you just want to test your coaching skills by tackling the maze? What’s at the end?


  • New History and Map.
  • New Graphics.
  • Shared Experience
  • Two Initials Minun and Plusle.
  • The first 3 generations of Pokémon plus their fourth generation evolutions are available
  • All Pokémon present received a new learnpool and the weakest mediums received buffs and adjustments to bring them to the level of the others
  • Two selectable game modes are available in the prologue: Normal and Hard
  • The labyrinth is divided into layers and each of them has a captain that must be defeated if you want to continue
  • Adding part of the movements of subsequent generations
  • All Pokémon, both trainer, and wild, will have 31 IVs in all stats to decrease the grind
  • Pokémon nature is highlighted in the various menus
  • EVs-IVs screen available in the Start menu
  • The automatic stroke can be activated and deactivated by pressing the “L” key on the GBA Emulator
  • All fights in the game will be doubles, except when you have only one Pokémon
  • Pokemon will not give EVs when defeated. Indeed, it will be necessary to use vigor tools and vitamins (from the reduced price)
  • There is a soft level cap to prevent players from making me too much and ruining the gaming experience
  • Cannot use healing tools in combat unless held (like berries)
  • There is a Prodigious Exchange system in the Talrega guild
  • O Esplorokit replaced o MN Cut, Force e Split
  • MT infinite
  • Presence of Etrian Odyssey features such as collection points, excavation, sea explorations, FOE, and store upgrades
  • New soundtrack.



  • A young adventurer that wants to challenge the Yggdrasil Labyrinth.
  • Good at Pokémon battles, she tries to follow in her sister’s footsteps in order to surpass her.
  • Signature Pokémon: Plusle & Minun


  • The best explorer from the Adventurers Guild in the city of Talrega and Nyx’s older sister.
  • She’s the one that wrote the majority of books and guides regarding the labyrinth, its treasures and mysteries.
  • Signature Pokémon: ???


  • An introverted and awkward boy who will travel with Nyx during her adventure.
  • He has a mysterious connection with Aimée.
  • Signature Pokémon: Kecleon & Shroomish.


  • A strange girl who will travel with Nyx during her adventure.
  • She claims to be a robot and acts like one.
  • She has a mysterious connection with Aimée.
  • Signature Pokémon: Mawile & Porygon


Beta 2.6

  • Fixed an issue regarding shiny encounters becoming Bad Eggs after being captured (GOD AT LEAST I HOPE SO);
  • Removed the guaranteed shiny option from Talrega’s fountain;
  • Shiny encounter rate has been set to 1/1024 (the old one was 1/8192);
  • Fixed an issue regarding callAsm and battlestring functions;
  • Fixed an issue regarding Choice Scarf not boosting the user’s speed;
  • Fixed an issue regarding Technician not boosting low BP moves;
  • Fixed an issue regarding Boomburst not being recognized as a sound-based move;
  • Fixed an issue regarding Sandy Shock’s stats;
  • Fixed an issue regarding some learnsets;
  • New Pokémon added: Kleavor (use Black Augurite on Scyther);
  • New abilities added: Moxie, Defiant, Competitive, Skill Link;
  • New moves added: Shell Smash, Quiver Dance, Stone Edge, Stone Axe (70 BP, 95 Accuracy high-crit move, Kleavor only);
  • Pokémon gender ratio has been set to 50% (except for male/female only species);
  • Learnsets and abilities have been updated (for example Butterfree now learns Quiver Dance, Furret has Fur Coat etc etc);
  • New items added: Eviolite, Rocky Helmet, Flame Orb, Toxic Orb, Life Orb, Assault Vest, Weakness Policy, Light Clay;
  • Sitrus Berry’s effect updated: it now restores 25% of max HP instead of just 30 HP;
  • Pokéball containing TMs are now yellow;
  • New move animations for: Mysticalfire, PowerUpPunch, Aura Sphere, Head Smash, Iron Head, Poison Jab, X-Scissor, Icicle Crash, Drain Punch, Shadow Sneak, Aqua Jet, Bullet Punch, Shell Smash;
  • Bag, TM Case and Treasure Pouch have now a better UI;
  • Reworked TM case: you can now see which Pokémon are compatible with a determined TM before teaching it;
  • You can now see your team and current game version in the “Continue/New Game” screen;
  • Hard Mode bosses updated with new held items and moves;

Beta 2.5

  • 3 new secondary islands: Aqua Resort, Jagged Mountain, and Faraway Island;
  • 21 new regional variants: Rattata, Raticate, Sandshrew, Sandslash, Krabby, Kingler, Smoochum, Jynx, Ponyta, Rapidash, Aerodactyl, Meganium, Typhlosion, Feraligatr, Stantler, Poochyena, Mightyena, Barboach, Whiscash, Relicanth, Mismagius;
  • Added lore text on the Third Stratum Stele, in Etria and Etria’s Graveyard.
  • Revamped Pokemon icons;
  • Revamped overworld graphics;
  • Revamped overworld sprites;
  • Mood-accurate portraits;
  • Pre-battle mugshots for major boss fights;
  • New move tutors;
  • Initial Stamina value: 10 -> 20;
  • Buffed Stamina value: 20 -> 40;
  • It’s now possible to change game difficulty whenever you want by interacting with the poster at Nyx’s house;
  • Explorer Kit replaced with Adventurer Codex (basically a Pokedex);
  • Evolution specialist added at the Guild of Talrega (NPC that tells you how to evolve your Pokemon);
  • Fixed a bug regarding shiny encounters becoming Bad Eggs after being captured;
  • Fixed some movement permissions;
  • General buffs to underperforming Pokemon.


Useful Stuff


Previous Versions