well, i beat him
. i used meltdown, tripled everyone,hasted everyone, auraed everyone, mighty guarded everyone, and then i dueled and renzokukened him until he died
however, everyone says he uses lv 5 doom, and he never used it on me, the 5 times i tried to beat him...im just thankful i didnt have to fight anyone on the way out....those monsters were scary! i always Lv Downed them ...well, now to free rinoa!