Pokémon Quetzal (formerly known as Pokémon Emerald Multiplayer) is a highly ambitious fan-made ROM hack of Pokémon Emerald developed by
In the first instance, go to File -> Multiplayer window . Select the "Network Play" option to host a server.
See other players on the map, trade, and battle without jumping through hoops.
Join the Quetzal Discord, grab the v16 Multiplayer patch, and convince a friend to download Parsec. Hoenn is waiting—and this time, you don't have to explore it alone.