*SPOILERS*
This is something the game never really deals with. Jecht and Tidus are part of the Fayth's dream, not from the past. Something happened almost 10 years before the story began and some sin managed to pull Jecht from the dream into the "real world" where he became Brasca's guardian and the Fayth for the "final aeon" that would destroy Sin, kill the summoner, and eventually become the next Sin. During this, he somehow sucked the unsent Auron into the Zanarkand dream. Once he actually became sin again (10 years later) he was able to access the dream world and the real world and managed to pull Auron and Tidus into the real world again. Again, something the game doesn't explain how he's able to do these things.
In summary; Jecht was also part of the dream and somehow got pulled into Brasca's world. We're not told how or why.
Tidus was always a dream character too. When Yu Yevon was defeated, the Fayth "woke up" and the dream ended. This includes everything that was part of the dream (ie. Tidus). X-2 introduces the impossible plot hole of the "guy that never existed is still alive and you can bring him back!"
*END SPOILERS*
This, along with several other elements, makes me hate this game. Too many things don't get answered and I just ended the game asking more questions. I enjoyed nothing about this game except turning it off and selling it back to GameStop.
I was close to deleting the following because I'm mostly certain it'll get moderated and removed. "But wait," I said to myself "the Internet is a place for expressing oneself without fear of bodily harm as a reprisal like in your Elementary School days. You should feel free to give negative statements in the hopes that someone will actually read it before it gets erased forever and becomes impossible for anyone to see it and actually think critically upon the subject." That was enough to convince me that I should leave it so you too can discover the benefit of reacting to criticism. If nothing else it will, hopefully, make you into a better critical thinker and encourage you to pick your battles. Which, in turn, will allow you the opportunity to develop the dormant skill of forming constructive and convincing argumentative rebuttals. Who am I to rob you of that educational process?
I also can't stand the androgynous fanchilds that can't defend why they like FFX so much. They're just whiny brats who love the fact that it's one of the first games they got on their PS2 because it was a Final Fantasy game and they can't get past those two words on the title. Voice-acting, high-poly counts, pretty music, and made-up-languages-that-are-really-cyphers don't make a good game! If you think that's all it takes then good for you for finding enjoyment in a game where the story was the element that was given the least amount of attention. It's a narrative RPG for crying out loud! The first 2/3 (or more) of the game is told like a campfire story because it practically IS! The story is what drives me to walk half-way around the planet chasing after some freak hermaphrodite wearing too much make-up (read: Kefka, Kuja, and Seymour). If I don't want motivation for going from point A to point B killing everything I meet I'll play Quake, Doom, or any number of ID games where the principle game-play mechanic was actually the thing that was given the most attention (eg. killing everything that moves and a few things that don't). If you CAN defend why you like it and don't believe that any other game that ISN'T FFX is a waste of the media it's printed on, then my hatred doesn't apply to you. At that point I just stop taking anything you say about the "quality of games these days" seriously.
Likely to get modded for my Ben Croshaw impression even though I'm not calling anyone in particular out,
NFITC1
PS - Subsequently I archived this in case anyone is interested in reading it after it's gone.
