so I was browsing around and I noticed something new in the yoshimitsu tekkenpedia site. :
Tekken 5 & Tekken 5: Dark Resurrection
When successfully preforming the kamikaze feint move, a distinct "oops" can be heard afterwards. (right, X+O, left)
I never knew this o.o, does this also work in Tekken 6?!
Nah, it's not a "secret". Indeed in Tekken 5.0 and DR when Yoshi did f+3+4~b, the announcer said "oops!". Probably because the animation was taken from Tekken Tag (animation of tagging while running), and "oops" would mean something like "but you don't have a partner!" or "you can't run away"
At least I understand it this way.
It's no longer the case in Tekken 6.