I've gotten the perfect ending before, and for those who want to see it, but dont feel like going through that 100 level Bevelle thing (cause that does count towards your percentage) you have to play through it twice.

Well, this is how it happened for me. I had like 97% and I started a new game+, then I made sure I did EVERYTHING on that game. I was going to do the Trema sidequest as well, but I was going to put it off until I finished everything else, and then, when I did finish everything else, I found out that I had 100% and didnt need to do the sidequest o0

Wanna know why? The ending boss gives you credit as well. So if you do everything on your first play through you have extra credit but it dosent show it.

I have to warn you though, the perfect ending....kind of sucks o0 In my opinion anyway. Its not even in FMV mode x-x

Oh well, hope my tip helps >>

amg i aint bothered to complete it at all cause i know its gonna be sad and they wont get tidus back so i don wana bother tell ne what happens!!!!!!

pm me the ending if not openly plse :) !!!!!!!!!!!!!!!!

I think I had actually gotten the perfect ending without getting 100% complete on this game. It's kinda weird, but I know for sure I didn't get 100% and I still saw it (when I compared it to screenshots of the perfect ending). Is my game just messed up or did someone have this happen too?

Hmm...strange, thats never happened for me before. Theres actually more than one way to get 100%
You don't even NEED to do the 100 floors of Via Infinito, just as long as you get the sphere from Level 0 and Level 20. I managed it.