Ready 2 Rumble Boxing

Go to the character selection screen and enter any of the codes bellow.
If the codes are accepted, you should hear a sound.

Cheat mode
Press Left, Right, Left(2), Right, Up, Down, R(5), L

All boxers
Press Left(2), Right, L, Left, Right(2), R(2), L.

All champion costumes
Press Left, Down, Right(2), Up, R, L, R(20), L.

All holiday costumes
Press Left(2), Down, Right, Up, R(8), L, R(4), L.

All training
Press Left, Down, Up, Down, Up,R(20), L.

Set holiday to New Years
Press Right, Up, Down(3), R, L.

Set holiday to Valentines Day
Press Right, Up, Down(3), R(2), L.

Set holiday to St. Patricks Day
Press Right, Up, Down(3), R(3),L.

Set holiday to Easter
Press Right, Up, Down(3), R(4), L.

Set holiday to Independence Day
Press Right, Up, Down(3), R(5),L.

Set holiday to Halloween
Press Right, Up, Down(3), R(6),L.

Set holiday to Thanksgiving
Press Right, Up, Down(3), R(7),L.

Set holiday to Christmas
Press Right, Up, Down(3), R(8),L.

Set holiday to New Years
Press Right, Up, Down(3), R, L.

Fat boxer
Press Right(2), Up, Down, Right, R(2), L.

Thin boxer
Press Right(2), Up, Down, Right, R, L.

Undead boxer
Press Left, Up, Right, Down, R(2), L.

Big head
Press Right(2), Up, Down, Right, R(3).

Big gloves
Press Left, Right, Up, Down, R, L.

Faster gameplay
Press Right(2), Up, Down, Right, R(4), L.

Hyper speed mode
Press Left(2), Down, Up, Down, Right(2), R(19), L.

Additional 15 camera angles:
Press R(20), L, R, L, R(21), L, R(18), L, R(9), L, R(14),
L, R(5), L, Left, Right, Up,Down, L.

Start at final match
Press L, Down, Right, Up, Left, R(6), L, R(2), L.

View ending
At the main menu, press Right(3), Down, R, L.

Full level 1 Rumble meter
Pause the game and press R, L, Down, Up(2), Left, R(3), L.

Full level 2 Rumble meter
Pause the game and press R(2), L, Down, Up(2), Left, R(4), L.

Full level 3 Rumble meter
Pause the game and press L, R(2), L, R, L, R(4), L, Left,
Right, Up, Down.

Box as Freak E. Deke and Michael Jackson
Press R(13), L, R(10), L

Unlockable characters:
Bill Clinton: Finish the game in arcade mode 9 times
Freak E. Deke: Finish the game in arcade mode once
Freedom Brock: Finish the game in arcade mode 6 times
G.C. Thunder: Finish the game in arcade mode 3 times
Hillary Clinton: Finish the game in arcade mode 10 times
Michael Jackson: Finish the game in arcade mode 2 times
Robox Rese-4: Finish the game in arcade mode 8 times
Rocket Samchay: Finish the game in arcade mode 7 times
Shaquille O'Neal: Finish the game in arcade mode 5 times
Wild "Stubby" Corley: Finish the game in arcade mode 4 times
Rumble Man: Finish the championship mode with all characters, after
finish arcade mode in hard mode.

Change costumes
Go the character selection screen, highlight any boxers
and push Square.

Unlockable outfits:
Unlock the champion outfits. Finish the championship mode
Secret Easter outfit: Modify the system date to April 23, 2001
Secret Halloween outfit: Modify the system date to October 31
Secret Independence Day outfit: Modify the system date to July 4
Secret New Year's outfit: Modify the system date to January 1
Secret St. Patrick's Day outfit: Modify the system date to March 17
Secret Valentine's Day outfit: Modify the system date to February 14
Selene Strike and a snowman outfit for Rumble Man: Modify the system
date to December 25
Unlock the champion outfits. Finish the championship mode