These weapons are the characters strongest:
Zidane: ultima weapon
tou have to take the blou chocobo first, then go to were shimmering island used to be and use a dead pepper and you will find ultima weapon in the treasure.
Vivi : mace of zeos
in memoria by the left side of the stairs.
Freya: kain's lance
at the right side of memorias entrance.
Quina: gastro fork
cath 99 frog and Quale will challenge you for a match, if you defeat Quale he will give you quinas best weapon.
Eiko+Dagger: tiger racket
if you have got any dead pepper, go to quan's dwelling and use dead pepper in the window were vivi was found and you will find tiger racket in the treasure.
Jaffar(the one who was send to kill Zidane and Garnet):rune claws
it's in some where in memoria i don't know where but it is there.
Easy way to defeat ozma:
my way is very easy you even don't need to get your character's level very hight lv 60,70 or even 50 is good enough.
Before the match:
if you want to defeat Ozma you need Steiner,Zidane,Freya and Quina in your party members, you have to get ultima weapon for Zidane, there is no need for any excalibur for steiner because ragnarok is enough either, equip demon's mail on both of Steiner and Freya,demon's vest for zidane and pumice piece for quina, make shure every body have got auto life clear headed,antibody,bright eyes equiped in there ability,and the match will be easier if you equip bandit,mug,master thief on Zidanes ability either.
In the match:
keep stealing by Zidane untle you take every thing Ozma have then keep using Thievery, Freya use Dragon's crest, Steiner use shock and quina use Mighty Guard and auto life for every one dies,if ozma use dreaded Curse let Quina use his Angel's snack. keep using Zidans thievery,Freyas Dragon's crest,Steiners shock and keep giving your charactars auto life if it has gone by Quinas auto life and if nobody need auto life or Mighty Guard use frog drop, blieve me you won't need alot of time to defat Ozma by thes way.