Alternate Outfits Cheat:
Goto the Character Select Screen and hold all of the "C Buttons" and "Press A"

Big Head:
Defeat WWF Challenge w/ "The Rock" or "British Bulldog"

Burp & Fart:
Defeat WWF Challenge w/ "Mosh" or "Thrasher"

Ego:
Defeat WWF Challenge w/ "Ahmed Johnson"

Get to Sue:
Defeat WWF Challenge w/ "Owen" or "Brett Hart"

Get to Dude Love & Cactus Jack:
Defeat WWF Challenge on Normal Difficulty w/ "Mankind"

Get Back Up:
Hold Z, R, and L

Ladies Night:
Defeat WWF Challenge w/ "Triple H" or "Shawn Micheals". You can then use women bodies in create a wrestler

No Wimps:
Defeat WWF Challenge w/ "Farooq" or "Ken Shamrock"

No Meters:
Defeat WWF Challenge w/ "The Undertaker"

Reflections:
Defeat WWF Challenge w/ anyone and any mode

Wrestler Outfits:
Defeat WWF Challenge w/ "Kane"

Goldust Costumes:
Defeat WWF Challenge on Normal Difficulty w/ "Goldust"

Additional Stone Cold Costumes:
Defeat WWF Challenge on Hard Difficulty w/ "Stone Cold"