From scattered forum posts (GBAtemp, PokeCommunity, /r/PokemonROMhacks, 4chan’s /vp/), players report:
The in the title is fascinating. In standard ROM naming, (U) implies the clean American version. But here, it is lower case with hyphens: -u- . Some dataminers believe this is a subtle indicator that the ROM is an unstable build.
Game Boy Advance (ROM Hack) Base ROM: Pokémon Emerald Theme: Retro-Futurism, Glitch-Hop, & Memetic Chaos