Mr. Karate:
Press X while charging. He will stop, bend his upper body, and execute a strong punch. While bent, no punch or kick can hurt his upper body. Press Y while charging. He will stop, bend forward, and execute a high kick. No punch or kick to his upper body will affect him.

Ryo Sakazaki:
Press Down, Down/Right, Right + R + X to execute a 2.8 second power attack when his strength gauge is low.

Lee:
Press Forward, Back, Down/Back, Forward, X to move up and down with blades out.

Jack:
Sweep the D-pad Counter-clockwise from Back to Forward, R.

Mr. Big:
Press Forward, then sweep the D-pad Counter-clockwise from Back to Forward, X.

John:
Press Down/Back, Forward + R.

Todo:
Sweep the D-pad Counter-clockwise from Back to Forward, X, R.