Squaresoft originally planned to make two spin off titles to 'Final Fantasy X (2001) (VG)'. One was to be focused on Yuna, and the other on Rikku. That idea was scrapped, and both characters play a central role in this game.
All the aeons from 'Final Fantasy X (2001) (VG)' appear in this game. Here, they are possessed and Yuna is forced to fight them.
The only three temples you cannot visit are Macalania Temple, Baaj Temple and Remiem Temple.
Cree Summer voices two characters in this game, having voiced two in the previous one. In both games she voices a summoner and a young child - Belgemine and the young Tidus in the first game, Lenne and Calli in the second. Calli had been voiced by a different actress in the first game.
Rick Gomez and George Newbern would later be chosen as the official voice actors for Zack Fair and Sephiroth respectively in the Compilation of Final Fantasy VII. In both Final Fantasy titles they appear in, they voice military men. George Newbern's character goes mad and betrays his comrades in both as well.