Quote Originally Posted by Endless. View Post
It's Yojimbo's fourth special attack. It kills everything in one hit, with some exceptions.

ExceptionsYunalesca, Braska's Final Aeon, Yu Yevon, underwater fiends, all bosses fought prior to the acquisition of Yojimbo, and all bosses fought without Yuna's presence.
That's because Yunalesca is technically 3 different enemies fought one after another, and BFA is two.
I believe Yojimbo can kill any enemy, the only thing that limits you is when you have access to Yojimbo. Someone should hack in Yojimbo at a stage where you can't normally have him, and check if he can Zanmato stuff.