everyone gets differant abilities at differant levels depending on the weapon you chose at the station of serenity
I choose sword..thats why I get berseker before... you cam allsoo hav it by the wepon you wins at (i think) titan cup.... or godness... well...and I did´nt had such a hard time beating him as you may think...I just waitad till a good lvl to try... and I bet him without elixirs...=]
only used hi-potions...
so my tip to bet him is.... berseker, valor and master lvl 7, final lvl 3 and a 6 atk keyblade(ultima/ punpking and few others...) 6 hi-potions...and a lot of patience... good luck you all...
ps: I would like to try it out with swet drems....hauhauhau...who finished the poo world will understand me(0/0) Lol!!!!!!