You acquire them as you progress in the game by visiting temples. The basic aeons are,
Valefor
Ifrit
Ixion
Shiva
Bahamut
There are others you could get which are,
Anima
Magus Sisters
Yojimbo
yes u should always use aeons to fight bosses
Yes, but good luck! I used my aeons
No, they are just special super difficult optional bosses in the international edition and the HD remake.
When you get Enough AP to get a sphere level and find a hp orb (+200) it will automatically make your Aeons hp rise.
He is a 'Fayth', a summoner preserved in stone. The Aeons themselves are dreamed into existence by the Fayth, that boy is Bahamut's Fayth.
Final Fantasy X was first released in the year 2001.
Yes well this is my opinion. Final Fantasy X is better than Final Fantasy XIII
Yes there are subtitles in Final Fantasy X
There are no cheat codes for Final Fantasy X.
There isn't a whirlwind in Final Fantasy X.
Sin was only in Final Fantasy X, and mentioned in Final Fantasy X-2.
Final Fantasy X-7? no. there is Final Fantasy 10-2 which is the sequel to Final Fantasy 10 (and is the only actual sequel in all of the final fantasy games) and there is Final Fantasy 7, but there is no Final Fantasy x-7. the games may be made by the same people but do not relate to each other in anyway other then the fact they are Final Fantasy.