Pokémon Emerald allows for data storage through a tool called mon-fs, which encodes files as Pokémon. Each Pokémon carries 68 bits of data, including attributes like species and gender. The mon-fs tool has two modes: Lite, which stores files up to 3.2 KB, and Full, which supports files up to 10.8 KB but requires a save editor. Players can effectively use four Pokémon—Poochyena, Whismur, Taillow, and Nincada—for data storage, each having a 20% or higher appearance rate on Route 116. A web utility assists users in capturing and naming Pokémon to represent their data, but the process is time-consuming and not efficient for file transfer.