I just read recently in the Official U.S. Playstation Magazine, in which a fan e-mailed saying that there's a way to get 100% completion without facing Trema at cloister 101 in the Via Infinito.
It says to first do a game in which you give the sphere to the Youth League and get as much done as you want and make sure to get the scenes you can only get from giving the sphere to them.
Then with New Game Plus, give the Sphere to New Yevon and finish off the missing percentage including only the scenes you can get by giving them the sphere.
It says that if you do this, at the end of the second game you will have 100% and see the perfect ending without having to run the via infinito to the furthest depths.
Has anyone tried this yet? If it works, thats great. I just re-started and am almost finished with chapter 2.
Also, in order to get completion, do you have to do such mini-games as:
-Lightning Towers
-Blitzball
-Chocobo Ranch
-Cloister of Trials Gunners Gauntlet
-and who out of the suspects from Mi'hen Mystery gives you completion?
Thanks