Play as Gorgon (the announcer):
At the title screen press L1, L1, L2, R2, R2, R1, Triangle, Down, X, Up, Select.
At the wrestler-select screen, highlight "Agent Orange" and press Select.

Sallie (the referee):
At the title screen press Up, Down, Left, Right, Triangle, X, Square, Circle,
L1, R1, L2, R2, Select. At the wrestler-select screen, highlight "El Temblor"
and press Start.

Sparrow:
At the title screen press Circle, Right, Triangle, Up, Square, Left, X, Down, X,
Down, Square, Left, Triangle, Up, Circle, Right, Select. At the wrestler-select
screen, highlight "Commandant" and press Select.

Power Warrior Secret Wrestler (Japanese version) :
At the title screen, press Square, X, Square, X, Circle, Triangle, Circle, Triangle, Up, Down, Left,
Right, Select. If you entered the code correctly, you will hear the sound of the bell. Now highlight
the seventh wrestler listed (Lance; Kensuke Sasaki in the Japanese version), and press Select.