A Contest of Aeons

"A Contest of Aeons" (召喚獣バトル, Shōkanjū Batoru) is the boss theme that plays during the final battle sequence against Yuna's Aeons which have been possessed by Yu Yevon in Final Fantasy X. This track is composed by Junya Nakano. It is the seventeenth track on disc 4 of the game's original soundtrack.

Final Fantasy Fables: Chocobo's Dungeon
This track is used as a battle theme in this game, renamed "Alexander Battle". Rearranged for the game by Yuzo Takahashi, it was released in the game's soundtrack in 2008 as the twenty-fifth track.

Dissidia 012 Final Fantasy
An arrangement of this battle theme by Takeharu Ishimoto appears as the 42nd track of Disc 1 in the original soundtrack.

Decisive Battle (Final Fantasy X)