You need not to be lv 99! and have all the growth abilities( but they sure help)!! you'll need a big defence status. also remove any lucky lucky and drive abilities but leave trinity limit!(sora can perform the limit alone) AS shortcuts i recommend hi-potions, elixirs, reflega , curaga(seph. is immune to elemental spells like blizzaga) AS a keyblade i strictly recommend the ultima weapon(for it's ability!)

the battle: sephiroth will start with a FLASH, one of his devestating atttacks! be sure to press triangle immediately! after s. will begin a combo and hurls you in the air! DO NOT PREESS NOTHING!! when an orb appears press square( retalating slash) and begin your combo. after a few minutes s. will summon dark orbs in the arena which will stay stationary for a few seconds, be sure to use reflega on them! s. usually uses his ultimate attack! you can identify it because he floats and says SIN HEARTLESS ANGEL! jump(double jump) or use trinity limit yo stop it. s. also has his pillars of flame( he says PERISH NOW!) run away!!!then after some damage s. will have a pink glow(Safer mode i think) keep away from him as s. will get stronger!