[Unknown_tamer]

Shuyin and Tidus are the same people except Tidus is a dream. We know that Yu Yevon was a summoner back in 1000 years ago. During that time there was a war between Bevelle and Zanarkand, Yu Yevon , a summoner, knew that Zanarkand was gonna lose thus he sacrificed his own people in Zanarkand,by turning them to stone, to create Aeons and the Final Aeon, Sin, but promising them he will keep them alive. Sin purpose was to destroy Machina that Bevelle used and become Yu Yevon armor. After the war, Yu Yevon than made Dream Zanarkand, a place that exist but it is impossible to get to and dreamed of every person living there. They may not be exactly the same but they will have similar look. This dream created Tidus and Jetch. Yu Yevon than made Sin to protect this Dream Zanarkand. When Jetch went o go training and travelled by Machina boat, the boat therefor is a Machina and Sin soon came to attack the boat resulting in bringing Jetch to Spira. So as we see in the FFX Tidus asks the Fatyh if he is a dream and they said yes and sorry. At the e of FFX we see that after defeating Yu Yevon he stops dreaming causing Tidus and Jetch to disappear. Shuyin was in Zanarkand 1000 years ago, played blitzball, and has the same fighting technique as Tidus. Tidus is a dream created from Yu Yevon vision of Shuyin. Even in FFX-2, the Faityh says Shuyin is a shadow that is more powerful than the faityh. He exist by holding his hate on Spira or Bevelle, a shadow that was created by pure hatred is able to possess many. Shuyin also existed in the Real Zanarkand compare to Tidus who lived in the Dream Zanarkand. In the game, Dream Zanarkand existed because of Yu Yevon promise therefor Tidus is Shuyin but in Yu Yevon version of Shuyin.