ok not sure how to explain this very well but....
ok, tidus used to be in his normal time period playing blitzball in that incredible fmv at the beginning, but when he was "sucked in" by sin, his memories and spirit were transported 1000 years into the future, but his physical body wasn't, so as u no the fayth explained that he was simply made up of dreams and memories. when he was taken into the future, i'm not sure what really happened to his phsical form, maybe it died, idk. but what i do no is that in the end he went to the farplane which supports the idea that he died in the travel and was a dream ever since he awakened in baaj temple, which is where his story begins. :rolleyes2 that's an okay explaination i guess, but if yur lost, then i'd be happy to try and explain it better. :p