Phoenix (summon)

Phoenix is a summon that appears in various games. Its ability, Rebirth Flame (sometimes simply called Rebirth) revives all fallen allies. Sometimes it also deals fire-Elemental damage to all opponents. It usually has an important story element.

Final Fantasy V
Phoenix makes its first appearance as a Level 5 summon. It is obtained at the top of the Phoenix Tower, where Reina Charlotte Tycoon has a flashback, where she must decide whether or not to cut the tongue of her Hiyruu to save her mother. If she refuses, the party obtains the summon.

Final Fantasy VI
Phoenix is an Esper that is obtained in the Phoenix Cave. Locke Cole has been searching for a way to revive his girlfriend Rachel, and found a way using the Phoenix Esper. He uses Phoenix to revive her, and she lives long enough to make Locke's guilt go away. Afterwards it is gained as a piece of Magicite. It costs 110 MP to summon and it teaches the following spells:
 * Life X10
 * Life 2 X2
 * Life 3 X1
 * Cure 3 X2
 * Fire 3 X3

Final Fantasy VII
Phoenix is a Summon Materia that is obtained at Fort Condor if Cid Highwind manages to protect the Huge Materia inside from the Shinra. If he does so, the condor sitting atop the fort dies and it is reborn into the Phoenix Materia.

Final Fantasy VIII
Phoenix is a "semi-Guardian Force" in this game, and can only be summoned if someone uses a Phoenix Pinion.

Final Fantasy IX
Phoenix is an Eidolon that only Eiko Carol can summon. It is learned by equipping a Phoenix Pinion, and it randomly has a chance to be summoned automatically if Eiko is in the party and there is a Game Over. This rate is proportional to the amount of Phoenix Pinions the party has.