Which generation of Pokémon games introduced the Hoenn region?

Generation III introduced the Hoenn region. Its main-series games began with Pokémon Ruby and Sapphire, released for the Game Boy Advance in Japan in 2002 and internationally afterward.

Hoenn is an island-rich region with a strong emphasis on water, weather, and travel by sea. The games added new locations, characters, contests, abilities, and Pokémon while retaining the series’ core ideas of capturing, training, battling, and trading.

Generation III introduced 135 new Pokémon, bringing the total from the first three generations to 386. Notable Hoenn Pokémon include Treecko, Torchic, Mudkip, Gardevoir, Absol, Rayquaza, Kyogre, and Groudon.

Players sometimes confuse Hoenn with Sinnoh because both regions belong to later generations and received Nintendo DS-era remakes. Hoenn is Generation III, while Sinnoh is Generation IV. Pokémon Emerald later served as an expanded version of the Ruby and Sapphire storyline.