Pokemon Omniversal Emerald is a GBA Rom Hack made by transwiththeplans. Explore a Pokemon x Ben 10 crossover featuring Ben 10 characters, over 400+ mutated Pokemon forms, alien fusions, DexNav, Level Caps, Innates, randomized Trainers, new locations, and much more.
Pokemon Omniversal Emerald GBA Rom Hack
- Author: transwiththeplans
- Hack Off: Emerald
- Language: English
- Latest Version: v0.3.5.1
- Last Updated: July 10, 2026
- Status: Beta Stage
Description
Pokemon Omniversal Emerald is a crossover hack between Pokemon and Ben 10. In this game, the Pokemon of the Hoenn region have been strangely mutated by a supposed comet that flew over the region.
With more than 400+ new mutated forms, you can discover Pokemon fused with aliens from across the Ben 10 series while exploring a heavily modified version of Hoenn.
You can play as Ben or Gwen and help catalog the new Hoenn Pokedex while discovering new Pokemon forms, locations, abilities, lore, and challenging Trainer battles.
The game is currently still a Beta/Demo, with the available story progressing up to the third Gym.
Features
- Play as Ben or Gwen and help catalog the new Hoenn Dex.
- More than 400+ mutated Pokemon forms.
- Fusions with aliens from across the Ben 10 series.
- DexNav with hidden normal Pokemon.
- Level Caps with Cap Candy.
- Randomized Trainers with specialized Pokemon pools for a different experience every run.
- New Abilities.
- Innate system similar to Pokemon Elite Redux and PokeRogue.
- New locations throughout Hoenn.
- More Pokemon encounters.
- Multiple starter selections.
- New story and lore.
- Various quality-of-life improvements.
- Fully recreated ORAS-style Mauville City for GBA.
- Move Tutors available in Pokemon Centers.
- Heart Scales available from Poke Marts.
- New and modified moves.
- Custom Pokemon forms, sprites, and battle content.
What’s New in v0.3.5.1
The latest Pokemon Omniversal Emerald v0.3.5.1 update adds several fixes and quality-of-life improvements.
- Added a temporary fix for the Hisuian Starter issue.
- Added a Move Tutor to every Pokemon Center.
- Heart Scales are now available at every Poke Mart.
- Added the new move Extortion for Gumshoos.
Previous v0.3.4 Changes
The earlier v0.3.4 update also introduced several balance changes and bug fixes.
- Changed Ceruledge’s evolution method.
- Nerfed Koraidon and Miraidon to prevent them from becoming too powerful around Gym 3.
- Fixed several boat-related glitches.
- Fixed various sprite issues.
Current Beta Progress
Pokemon Omniversal Emerald v0.3.5.1 is still under development and is currently available as a Beta/Demo.
The current version allows you to progress through the adventure up to the third Gym while exploring the modified Hoenn region and discovering many of the game’s new Ben 10-inspired Pokemon forms, abilities, Innates, and locations.
More story content, locations, Pokemon forms, battles, and other features are expected to be added in future updates.
Screenshots
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