Hello Cobra_69. Have you finished FFX? Did you see the ending?
Spoilers here, please do not read if you do not want to spoil the game for you. When Tidus was in the Sea at the end. He was not longer able to be when the Fayth were gone, so why was he floating in the sea. I am trying to think why he is there. Maybe there is a way he lived as he helped save the world.
Also in FFX-2 there is a Tidus look alike!
He looks younger and a little bit different to Tidus though, so I do not think that it is him, but I would like to know who he is and where his involvement is with the game.