Turns Emerald into an open-world game with all 8 generations of Pokémon, mega evolutions, and level scaling. Blazing Emerald
The "1986" prefix is actually a release number from old-school scene groups that cataloged GBA releases chronologically; Pokémon Emerald happened to be the 1,986th game they archived. The Gold Standard: Many popular ROM hacks, such as Pokémon ROWE Pokémon Horizons
If you own a physical Pokémon Emerald cartridge and a Nintendo DS with a flash cart (e.g., R4), or a device like the GB Operator, you can dump the ROM to your PC. This is legal in many countries for personal backup.