Pokémon Odyssey v4.1.1 – Dungeon-Crawler ROM Hack, Yggdrasil Labyrinth | Custom GBA Cartridge

Pokémon Odyssey v4.1.1 – Custom GBA Cartridge
Pokémon Odyssey is one of the most ambitious and unique ROM hacks ever made. Created by PacoScarso, this completed hack based on Pokémon FireRed throws out the gym badge formula entirely and replaces it with a deep dungeon-crawler adventure inspired by Etrian Odyssey and Made in Abyss. On the island of Talrega lies the entrance to the Yggdrasil Labyrinth — a colossal maze that has drawn explorers from across the world. No one knows how deep it goes, or what lies at the bottom.
You play as Nyx, a young adventurer who joins the Talrega Guild to uncover the labyrinth’s mysteries. But something goes terribly wrong.
This is a custom-made cartridge of Pokémon Odyssey v4.1.1 — the latest and most complete version — ready to play straight out of the box.
✅ Compatible with:
Game Boy Advance · GBA SP · Game Boy Micro · Nintendo DS · Nintendo DS Lite
🎮 Features:

Brand-new Talrega region with the Yggdrasil Labyrinth to explore
No gyms, no Evil Team — pure exploration and story
All battles are double battles (except with one Pokémon left)
100 new Etrian Variants — regional forms based on Etrian Odyssey monsters and classes
New Ether elemental type
Fully rebalanced Pokémon — every mon is viable
Etrian Odyssey mechanics: Mining & Gathering points, Naval Exploration, FOEs, Shop Upgrades
Every Pokémon has perfect 31 IVs — no breeding needed
Change Nature and Ability through in-game functions
Multiple difficulty levels with soft level caps
Brand-new original soundtrack
v4.1.1: expanded bag capacity, bug fixes, and balance improvements
High-quality custom cartridge shell, available in 6 colors
Plug and play — no setup needed

🕹️ Perfect for:
Fans of Etrian Odyssey, Made in Abyss, or anyone who wants a completely different kind of Pokémon experience on real GBA hardware.
ROM hack created by PacoScarso. Available for free on his official page.