Quote Originally Posted by qwertysaur View Post

Seymour Flux is the hardest boss in the game.
I would not say that. [SIN] Spawn Ekyu - the one which is pushed back by Seymour with nothing but power - is strong as well. The part before you fight it with Yuna, Auron and Seymour.

Also I love this battle with Seymour's battle theme and his Overdrive "Requiem". He is not my favourite Final Fantasy X character without reason.