It is available only in Emerald. To get to Faraway Island, the player first needs to have the Old Sea Map (which can be obtained by either an event in 2005, or mix records with someone who has it). The player then needs to head to the ship house in either Lilycove City or Slateport City to talk to the lady that asks where to go, there should be a third option besides the original two options. After a conversation between Mr. Briney and a sailor, the sailor offers the player to go to Faraway Island.
Faraway Island is a lusciously-dense jungle island that is inhabited by only one individual, the New Species Pokémon, Mew.
Caves, Tunnels and Mountains
Rusturf Tunnel · Island Cave · Granite Cave · Desert Ruins · Jagged Pass · Fiery Path · Mt. Chimney · Meteor Falls
Scorched Slab · Ancient Tomb · Mt. Pyre · Shoal Cave · Team Aqua Hideout · Team Magma Hideout · Seafloor Cavern
Cave of Origin · Sky Pillar · Victory Road · Sealed Chamber · Altering Cave E · Artisan Cave E · Desert Underpass E · Marine Cave E · Terra Cave E
Places of Interest
|Other regions: Kanto (Sevii Islands) · Johto · Hoenn · Sinnoh (Battle Zone) · Unova · Kalos · Alola · Galar (Isle of Armor · Crown Tundra)|