WCW Backstage Assault cheats and cheat codes for Nintendo 64

At the main menu and press the following button combination:

Unlimited stamina: Press R, R, B, R, R, B.
Indestructible weapons: Press L, R, L, R, C-Left, C-Left.
Giant women wrestlers: Press R, R, B, B, L, L.
Tiny wrestlers: Press R, R, L, L, C-Left, C-Right.
Replace normal grunts with rude sounds: Press R, L, R, L, B, B.

Unlock wrestlers:

Unlock Billy Kidman
Beat Billy Kidman in hardcore challenge mode

Unlock Johnny The Bull
Beat Johnny The Bull in hardcore challenge mode

Unlock Kanyon
Beat Kanyon in hardcore challenge mode

Unlock Lex Luger
Beat Lex Luger in hardcore challenge mode

Unlock Rey Mysterio Jr.
Beat Rey Mysterio Jr. in hardcore challenge mode on the medium difficulty

Unlock Ron Harris
Beat Ron Harris in hardcore challenge mode

Unlock Shane Douglas
Beat Shane Douglas in hardcore challenge mode

Unlock Bret Hart
Win the Hardcore Gauntlet 5 times

Unlock Buff Bagwell
Beat Buff Bagwell in hardcore challenge mode on the medium difficulty

Unlock Chris Candido
Beat Chris Candido in hardcore challenge mode

Unlock Crowbar
Beat Crowbar in hardcore challenge mode

Unlock Don Harris
Beat Don Harris in hardcore challenge mode

Unlock Daffney
Win the Hardcore Gauntlet with Sid

Unlock Elizabeth
Win a title with Lex Luger in hardcore challenge mode

Unlock General Rection
Win the Hardcore Gauntlet with Sting

Unlock Lance Storm
Win the Hardcore Gauntlet to unlock Lance Storm.

Unlock Kronik (Brian Adams and Bryan Clark)
Set your opponent on fire in the block in hardcore challenge mode

Unlock Medusa
Get a fight going in the ladies bathroom in hardcore challenge mode

Unlock Mike Awesome
Throw your opponent through a table, bench, or couch in the secret
area of the block in hardcore challenge mode

Unlock Tank Abbott
KO your opponent in the Block

Unlock Vince Russo
KO your opponent with the briefcase in the Media Center or
Parking Garage in hardcore challenge mode

Unlock La Parka
KO your opponent with the steel chair in the truck area in
hardcore challenge mode

Unlock Mona, Elizebeth, and The Total Package
Finish hardcore challenge mode with any female or male created wrestler

Unlock Lance Storm, Mike Awesome, Lt. Loco, and Doug Dillinger
Finish hardcore challenge mode in easy mode with any male wrestler

Unlock the 3 Count
Hit your opponent over the head with the TV in the Media Center in
hardcore challenge mode

Unlock Vampiro
Set your opponent on fire in the truck area in hardcore challenge mode

Unlock Eric Bischoff
Finish hardcore challenge mode in hard mode with Vince Russo

Unlock Kimberly
Finish hardcore challenge mode in hard mode with Diamond Dallas Page

Unlock Scott Hall
Finish the hardcore challenge mode in hard mode with Kevin Nash

Secret outfits
Finish hardcore challenge mode on any difficulty level with a wrestler
to unlock their secret outfits.

Unlock Media Center
Finish the hardcore challenge mode and win the Hardcore Title. 
Go to the U.S. Title to unlock The Media Center before you complete it. 
Enter to Media center and finish it for use in exhibition mode. 

Unlock Parking Garage
Win the Hardcore and United States Heavyweight Titles also.
Go to the World Heavyweight to unlock The Parking Garage before
you complete it. Enter to Parking Garage and finish it for use 
in exhibition mode. 

2 bonus attribute points:
Win the United States Heavyweight Title with Jeff Jarrett to receive 
two bonus attribute points.

3 bonus attribute points:
win the WCW World Heavyweight Title with any wrestler to 
receive 3 bonus attribute points.