The following is a list of allusions in Final Fantasy X.
- The Matoya's Blade weapon for Auron is an allusion to the witch Matoya. As Matoya is a witch, Matoya's Blade is a magic-based weapon.
- Seymour's story parallels that of the Emperor. Both were evil rulers killed by the player's party in their respective games, only to return to life as corrupted souls.
- Lulu's Celestial Weapon, Onion Knight, references to first job of Final Fantasy III NES version, Onion Knight. Additionally, he has his original 8-bit sprite on shield.
- The word used to describe summoned beasts and the name of Yuna's first summon are names of the enemies: Aeon and Valefor, respectively.
- The superboss Nemesis is named and somewhat modeled after the enemy of the same name from Final Fantasy III.
- After the Warrior Monks have taken over guard duties in Luca, a man wearing a green tunic walks around in the circle area with access to the stairs and the cafe (where the little girl with the red balloon is). He says that he asked out a Warrior Monk girl in the cafe, but she called him a "spoony bard" — a reference to the famous exclamation from Final Fantasy IV.
- The Magus Sisters first appeared in Final Fantasy IV. Their attack patterns are similar in Final Fantasy X to when they were fought as bosses in Final Fantasy X.
- When the Magus Sisters perform their Delta Attack Overdrive, they surround the enemy party in eight Crystals, four of a blue hue, and four of a red-orange hue. This alludes to the four blue Crystals of the surface world, and the four red-orange Crystals of the Underworld.
- Kain's Lance weapon for Kimahri is named after Kain Highwind from Final Fantasy IV.
- Mix first appeared as the Level 2 command ability of a Chemist.
- The ability to capture enemies first appeared in Final Fantasy V.
- Shinryu, which appears as a Monster Arena boss in Final Fantasy X, first appeared as a superboss in Final Fantasy V. Whereas the boss in Final Fantasy V merely used powerful water attacks, Shinryu in Final Fantasy X is actually submerged in water.
- Yunalesca's final form greatly resembles the battle sprite of Goddess.
- Strago Magus and Relm Arrowny were to fight using stuffed toys, but the idea was abandoned during the development of Final Fantasy VI. This idea was used for Lulu's weapons as she wields dolls.
- Yojimbo is based on the enemy of the same name from Final Fantasy VI.
- There is a dummied-out Buster Sword for Tidus in Final Fantasy X's data files. If given to Tidus via hacking, he strikes the enemy with the blunt side of the sword, similar to Zack.
- One of Lulu's dolls in Final Fantasy X is that of Cait Sith from Final Fantasy VII.
- Kimahri's Venus Gospel weapon may be an allusion to Cid Highwind's ultimate weapon in Final Fantasy VII.
- Lulu wields plush toys as her weapon; these include the alien PuPu and the animal Moomba, both of which first appeared in Final Fantasy VIII.
- Yuna's armor Solomon Ring may refer to the unique item of the same name in Final Fantasy VIII.
- The Ronso are willing to construct Yuna a statue with a horn on her forehead due to her strong will and opposition against Yevon teachings. Summoners of Madain Sari from Final Fantasy IX had horns on their foreheads.
- Kimahri Ronso is similar to Freya Crescent by being non-human dragoons, a representative race skilled with spears. They also share a character archetype – guilt-ridden guardian – because they were unable to protect their respective homes during their respective games' events.
Allusions to the Number TenEdit
Being the tenth installment of the series, Final Fantasy X makes some references to the number itself. Although many of these are not necessarily deliberate allusions to the number 10 (whether they are or not is speculative), they are nonetheless present.
- There are ten aeons: Valefor, Ifrit, Ixion, Shiva, Bahamut, Yojimbo, Anima, Sandy, Cindy, and Mindy.
- There are ten non-playable summoners: Braska, Gandof, Dona, Zuke, Yunalesca, Belgemine, Ginnem, Isaaru, Ohalland, and Yocun.
- The Machina War took place ten centuries before the game's start.
- The Monster Arena can hold up to ten fiends of each kind.
- Lord Braska's pilgrimage took place ten years before his daughter's. In the same year, Wakka joined the Besaid Aurochs.
- Kimahri left Mount Gagazet for ten years before returning.
- Before Yuna's pilgrimage started, she lived on Besaid for ten years.
- Without inclusion of months, Jecht came to Spira ten years before the game started.
- There are some heavy allusions related to Roman Catholicism, e.g.: pilgrimage, churches, priests, maesters (in catholicism: cardinal), grand maester (in catholicism: pope), and Sin.
- The character of Yuna can be seen as a messiah-archetype, with her mission to sacrifice herself in order to save Spira from Sin. During the Sending in Kilika, she even walks on the water, which may have been inspired by Jesus Christ walking on the Sea of Galilee.
- When Seymour is killed in the Macalania Temple by Yuna and her guardians, he falls on the ground assuming the pose of Jesus Christ hanging on the cross. Also, Seymour wants to cure Spira by sacrificing himself in order to become the next Sin and, according to his perspective, save Spira, possibly meant to reference Jesus's sacrifice of his life for the forgiveness of sins.
- Tidus says, "Don't worry, be happy?" when Kimahri tells him not to try to worry as it would make Yuna worry. This is a reference to Bobby McFerrin's song of the same name.
- "Macarena" is mentioned by Tidus by mispronouncing the name of Macalania Temple. This alludes to the popular song "Macarena", by Los Del Rio.
- R. Kelly's song, "I Believe I Can Fly", is also referenced, but not directly by name, but rather in a scene: when Seymour threatens Yuna's guardians atop the Palace at St. Bevelle, Yuna threatens Seymour that she will jump off from the balcony and assures the party to not be scared as "she can fly". Few moments later, Yuna jumps off and while everyone watches her somewhat sacrificial act she summons Valefor midair: an airborne aeon.