Friday August 22, 2014 at 10:52pm PDT (check back - new cheats added daily)
This trick will work for any character perfectly if done correctly, except for Iruka Sensei. (when used for Iruka the trick wont flow into a combo, leaving a very small, but still posible, for a experienced human/computer to get out of.) To use the combo you must press the B button twice without moving the control stick, then as soon as you press B the second time press X to unleash your undodgeable special ability. (When you press X after the second B, your attack should begin directly after your second punch.) Press X only once not repeatedly. If it doesnt begin after you press X, try again. Watch the combo meter, if the trick is done correctly you should see the number 3 pop up when your X button attack hits and the move starts.