the most powerful attack is shark attack blow. you press forward,forward+x+circle. then quickly after pressing that press square+triangle. then quiclky after pressing that press x+circle. if you hit all three. you will win that round.

The most powerful attack is SWORD IMPALE. It when used properly, may take the whole life of your enemy. All you have to do is to tap back twice + square. This can be used correctly by pressing X before attacking. Yoshimitsu can even change directions of sword (left or right) to hit enemies using side step. If you want to cancel the attack, just tap back twice. This is unblockable attack. Avoid its use on running enemies.