sorry doc but i was spot on...so perhaps you havent finished it or played FFX2. Zanakand is a technological wonder city, so to is Bevelle, but zanakand and bevelle both have summoners and bevelle launches a war. (this is where Shuyin and lenn from FFX2 come in). ultimatly bevelle, creating YuYevon, create sin who destroys zanarkand. All of zanakand is destroyed, but the thoughts and personalitys of it's people are preserved in teh dream of the fayth (summons). summons are actually brave warriors who became fayth. YuYevon attachs itself to a powerful aeon and forms SIN.
Tidus came from teh memories (dream) of zanakand.....hinted in FFX2 that he was a distortion of Shuyin, but we dont truly know as tidus has his own identity and his farther did become sin.
when tidus finlly travels to zanakand a thousand years in teh future it is a dead city, a relic and tome where the spirit of the great summoner Yunalesca transforms one of your buddies into teh final aeon to defeat sin.

so in the end tidus vanishes...but he ends up on the farplane, which, to me , proves tidus was real and so was Shuyin.

thats FFX/2

hey forever....what about werewolves

EDIT: Please do not double post. -Murder