Backyard Wrestling
Master code
Hold L and hit A, X, Y, B, A, X, Y, B while you're at the main menu.
Cheat option
Hold L and hit A, Y, A, Y, B while you're at the main menu. You'll see the "Cheats" option unlock in the options screen.
Invincible players
Go to "create a wrestler" mode and enter denicholas for the name.
Player one is invincible
Go to "create a wrestler" mode and enter jche for the name.
Player one has unlimited supers
Go to "Create a wrestler" mode and enter ddaniels for the name.
Player two is invincible
Enter cbarlow.
Player two has unlimited supers
Enter jmaxwell.
Big heads
Enter rtaylor.
Big hands
Enter okendall.
Big feet
Enter tpiperi.
Big head, big hands, and big feet
Enter tho.
Halo mode
Enter jgintu.
Ghost mode
Enter pjefferies.
Greyscale mode
Enter ksimeonov.
Wireframe mode
Enter ewilliams.
First person camera
Enter edma.
Toon character
Enter pstapley.
Toon backgrounds
Enter mbilodeau or mstapley.
Hardcore A.I. difficulty
Enter stomanovski.
Dameon Redd
Complete "talk show" mode once as any wrestler, and finish Meatlocker Mash in "talk show" mode with JCW's Evil Dead.
El Drunko
Complete "talk show" mode once as any wrestler, and finish Truckstop Turmoil in "talk show" mode with Karnage.
Jamie Madrox
Do same as above, but finish "Club Beatdown" in talk show mode with Sabu.
Madman Pondo
Complete "talk show" mode with any wrestler.
Masked Horn Dog
Do the same as above, but also finish the Backyard Bedlam in talk show mode with Masked Mike.
Sally
Ditto... and then finish the Mansion in talk show mode with Violent J.
Tom Dub
Finish talk show mode with Madman Pondo.
Tylene Buck
Finish talk show mode, and finish the Mall in talk show mode with Shaggy 2 Dope.