Unlock Special Move 1:
Beat UFC Mode and win a Silver Belt.

Unlock Special Move 2:
Beat UFC Mode in Open Weight and win a Gold Belt.

Unlock Special Move 3:
Beat Arcade Mode once.

Unlock Special Move 4:
Beat Tournament Mode once.

Unlock Mario Yamasaki:
View the Game Over screen 50 times.

Unlock John McCarthy:
First, perform all the hidden moves of Mario Yamasaki. Then at the Fighter Select screen, hold down L1 while highlighting Mario and press X.

Unlock Card Girl A:
Watch the between-rounds replay 100 times.

Unlock Card Girl B:
First, perform all the hidden moves of Card Girl A. Then at the Fighter Select screen, hold down L1 while highlighting Card Girl A and press X.

Unlock Bruce Buffer:
Get 1 Gold Belt.

Unlock Lorenzo:
Get a Gold Belt using a Created fighter.

Unlock Dana White:
First, perform all the hidden moves of Lorenzo. Then at the Fighter Select screen, hold down L1 while highlighting Lorenzo and press X.

Hidden Karate style:
Beat Career mode with a Created SUMO fighter.

Hidden Kung-Fu style:
Beat Career mode with a Created KICKBOXING fighter.

Hidden Ni-Jitsu style:
Beat Career mode with a created KARATE fighter.

Thanks to Revolution reader Michael Crave!