Omega appears as the last of the game's optional bosses, after Shinryu. It can be encountered on floor 99.
In Chocobo's Mysterious Dungeon 2, Omega appears as an optional boss on floor 24 of the Secret Dungeon. Defeating Omega with a Bottle rewards Chocobo with the Omega Essence. Curiously, Omega is vulnerable to the Blood Suck ability that can be forged into a set of claws through the use of a Vampire Essence. Claws with this ability have a random chance of reducing a targeted enemy to 1 HP, making it easier to capture their essence.
In Final Fantasy Fables: Chocobo Tales, Omega is one of the five Promo cards that can be obtained. In the Japanese and American versions, he must be downloaded from a download station. In the European version, the player simply has to enter the code Right, L, Y, Right, Down, Up on the Download Pop-Up Card screen.
Omega appears as the last boss on the book "Sky-Flying Twins". He is fought only by Raffy and Chocobo because of Raffy's sister being brainwashed.
In Final Fantasy Fables: Chocobo's Dungeon, in the optional dungeon Chocobo's Memories, the Omega Saddle along with the Ultima Talons can be obtained. Both items are considered the best equipment in the game.
Omega (capital: Ω, lowercase: ω; Greek Ωμέγα) is the twenty-fourth and last letter of the Greek alphabet. It is synonymous with a set's end or limit.