The strogest weapon in kh2 must be ultima weapon coz it has 6 str and 4 mag. Fenrir
(weapon from sephirot) just hav 7 str and 1 mag. It has more str but only 1 pts higher
from ultima and ultima hav 3 mag point higher from fenrir.
Ps: fenrir can decrease your max combos by 1 and ultima can regenerate your MP faster.

The best is Fenrir the on sepheroth gives you

The best is Fenrir the one sepheroth gives you it has 7 str and 1 magic even though the
magic is low the str is high.

Fenrir is the best weapon you may think its not simply because of the bad stats compared
to ultima and it gives you -1 combo but thats actually GOOD! if you equip fenrir and every
negative combo and no (air) combo plus then that means you instantly attack with an end
combo which is epic especially if you have abilities that make your end combo stronger
equiped (such as explosion (might not be right name i cant remember right now and i'm too
lazy to check)) so theres your answer

i think they are both good to use together so if you combine fenrir and ultima weapon with
valor form then you have urself a good combination. i tryed it, it turned out good

ultima because fenrir ability negative combo weakens it by one so it is weaker than ultima

i don't have Fenrir or ultimia so i am gonna give u mi list:

1- PhOnTeN dEbUgGeR (NiCkNaMeD PhOnToN dEbUrGeR)
2- Rubleing Rose
3- Monecrome
4- Lionheart
5- Follow the Wind
6- Hero's Creast (or however u spell it...)
7- Sweet Memories (i don't like Pooh..)
8- Circle of Life
9- Hidden Dragon
10- Kingdom Key (worst keyblade EVER)