Pokémon Emerald

Pokémon Emerald is the complete Hoenn package — Battle Frontier, both version mascots, and the largest post-game of the Gen 3 era. Randomizing Emerald means the Battle Frontier's AI teams face you with anything, not just standard sets. The extra rival battles and post-game depth make this the most replayable Gen 3 randomizer base.

Emerald's Battle Frontier contains five distinct facilities, and randomizing the game means the Frontier's AI opponents — including the Factory's rental Pokémon — can field anything from the full Gen 3 dex. The extra rival battles, the Brandon trainer gauntlet, and the Frontier make Emerald the most content-rich Gen 3 option for a normal randomizer playthrough.