You cannot download a single file called Emerald Kaizo Randomizer.gba legally or reliably. ROM hacks are distributed as "patches" ( .ips or .bps files). You must patch a clean ROM. Furthermore, the "Randomizer" aspect requires you to run the patched game through a third-party randomizer tool yourself.
Emerald Kaizo is famous for being one of the most difficult Pokémon games ever created. Pokemon Emerald Kaizo Randomizer Download
It is important to clarify a distinction for new players. You cannot download a single file called Emerald
are completely unpredictable (you might find a Mewtwo on Route 101). Pokemon Emerald Kaizo Randomizer Download