The Eon Flute (Japanese: むげんのふえ Infinity Flute) is a Key Item introduced in in Pokémon Omega Ruby and Alpha Sapphire. It is one of the legendary artifacts that is associated with Latias and Latios.
In Pokémon Omega Ruby and Alpha Sapphire, this item is in Steven's possession. He gives it to the player after ending the world disaster caused by GroudonOR/KyogreAS.
In Pokémon Omega Ruby and Alpha Sapphire, when the Eon Flute is played, it summons LatiosOR or LatiasAS to soar in the sky above Hoenn, and fly to any city, route, or island.
In Omega Alpha Adventure 1, Ruby used the Eon Flute on Southern Island to call Latias and Latios. It is also implied that the Eon Flute was previously under Emerald's possession.