Ensnared Pokemon are automatically catalogued within an upgraded Pokedex, whether it's the shark-like Sameheader or the pelican-inspired Pelipper, requiring players to learn their special abilities as they evolve into more powerful types. Tools or machines can also be acquired to perform tasks such as chopping down trees, fishing, surfing, planting berries, smashing rocks, and even flying.One hundred new monsters have been added into the mix, upping the total of catchable creatures to 200. Players will be able to carry a party of six Pokemon at once, after first catching them in the wild, with others stored in boxes accessible from each city's personal computer network. A total of 15 cities are available to explore, each filled with local residents and fellow trainers who will challenge players to hone their battle skills. The setting for both versions is the region of Hoenn, a chain of islands featuring a variety of climates and terrain, including mountain areas, arid deserts, murky swamps, and more.

Certain matches have players selecting two different Pokemon to fight their rival's two creatures, allowing for more choices in combat. The world in which players explore is entirely different, as are the strategies associated with the turn-based battles. While gameplay closely follows the framework established in earlier titles in the series, a number of enhancements have been incorporated.

Nintendo's monster-battling franchise makes its Game Boy Advance debut with the simultaneous release of Pokemon: Ruby Version and Pokemon: Sapphire Version, which differ in the frequency of certain monster types.

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