Xtra Costumes:
Goto the "Character Selection" screen and enter:
C-Left C-Right C-Up

Get a Sledehammer:
Play as Dake Ken and leave the ring during a match and enter the crowd. When you have entered the crowd press:
C UP
A sledgehammer will now be available

Use Ground Moves of Opponent:
When your opponent is lying of the mat press A+B together

Taunt:
With your wrestling standing, hold down on the analog joystick. Your wrestler will do a taunt out of order

Access Silver Belts:
During the opening sequence when the three wrestler are speaking into the mic (Hogan, Bischoff, and The Giant) press A

Get the NWO Belt:
Win the World Heavyweight Belt w/ Hollywood Hogan

Access the "World Heavyweight Mode":
Win the US Heavyweight Belt

Access the "TV Title Mode":
Win the Cruiserweight Belt

Instant Reversal:
Press R when your opponent hits you with a strong or weak attack.

WRESTLE AS:

Kidman:
Win "Cruiserweight Belt"

Curt Henning:
Win all "U.S. Heavyweight Competition Rounds"

Rowdy Roddy Piper:
Win "World Heavyweight Belt"

Meng and Barbarian:
Win "Tag Team Belts.

Kanyon and Mortis:
Select Kanyon in the WCW by winning the "TV Title".
Then highlight Kanyon and press C-Down to play as Mortis.


THQ Man:
At the character selection screen highlight "AKI Man" and then press C-Down

Managers:
Choose wrestlers with managers in the "One-on-One Exhibition Mode".
Press Z on controllers three and four once the match has started.