Cheat mode
 
 At the character selection screen, press Left, Right, Left(2), Right,
 Up, Down, R(5), L to unlock all boxers, costumes, and more. If you
 entered the code correctly, you will hear a sound. Press X to cycle
 through the costumes. 
 
 All boxers
 
 At the character selection screen, press Left(2), Right, L, Left,
 Right(2), R(2), L. If you entered the code correctly, you will hear a
 sound. 
 
 All champion costumes
 
 At the character selection screen, press Left, Down, Right(2), Up, R,
 L, R(20), L. If you entered the code correctly, you will hear a
 sound. Alternatively, successfully complete championship mode to
 unlock the champion costumes. 
 
 All holiday costumes
 
 At the character selection screen, press Left(2), Down, Right, Up,
 R(8), L, R(4), L. If you entered the code correctly, you will hear a
 sound. 
 
 All training
 
 At the character selection screen, press Left, Down, Up, Down, Up,
 R(20), L. If you entered the code correctly, you will hear a sound.
 
 Set holiday to New Years
 
 At the character selection screen, press Right, Up, Down(3), R, L. If
 you entered the code correctly, you will hear a sound.
 
 Set holiday to Valentines Day
 
 At the character selection screen, press Right, Up, Down(3), R(2), L.
 If you entered the code correctly, you will hear a sound.
 
 Set holiday to St. Patricks Day
 
 At the character selection screen, press Right, Up, Down(3), R(3), L.
 If you entered the code correctly, you will hear a sound.
 
 Set holiday to Easter
 
 At the character selection screen, press Right, Up, Down(3), R(4), L.
 If you entered the code correctly, you will hear a sound.
 
 Set holiday to Independence Day
 
 At the character selection screen, press Right, Up, Down(3), R(5), L.
 If you entered the code correctly, you will hear a sound.
 
 Set holiday to Halloween
 
 At the character selection screen, press Right, Up, Down(3), R(6), L.
 If you entered the code correctly, you will hear a sound.
 
 Set holiday to Thanksgiving
 
 At the character selection screen, press Right, Up, Down(3), R(7), L.
 If you entered the code correctly, you will hear a sound.
 
 Set holiday to Christmas
 
 At the character selection screen, press Right, Up, Down(3), R(8), L.
 If you entered the code correctly, you will hear a sound.
 
 Set holiday to New Years
 
 At the character selection screen, press Right, Up, Down(3), R, L. If
 you entered the code correctly, you will hear a sound.
 
 Fat boxer
 
 At the character selection screen, press Right(2), Up, Down, Right,
 R(2), L. If you entered the code correctly, you will hear a sound.
 
 Thin boxer
 
 At the character selection screen, press Right(2), Up, Down, Right,
 R, L. If you entered the code correctly, you will hear a sound.
 
 Undead boxer
 
 At the character selection screen, press Left, Up, Right, Down, R(2),
 L. If you entered the code correctly, you will hear a sound.
 
 Big head
 
 At the character selection screen, press Right(2), Up, Down, Right,
 R(3). If you entered the code correctly, you will hear a sound.
 
 Big gloves
 
 At the character selection screen, press Left, Right, Up, Down, R, L.
 If you entered the code correctly, you will hear a sound.
 
 Faster gameplay
 
 At the character selection screen, press Right(2), Up, Down, Right,
 R(4), L. If you entered the code correctly, you will hear a sound.
 
 Hyper speed mode
 
 At the character selection screen, press Left(2), Down, Up, Down,
 Right(2), R(19), L. If you entered the code correctly, you will hear
 a sound. 
 
 Additional camera views
 
 At the character selection screen, 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. If
 you entered the code correctly, you will hear a sound. Pause the game
 to find 15 new camera angles. 
 
 Start at final match
 
 At the character selection screen, press L, Down, Right, Up, Left,
 R(6), L, R(2), L. If you entered the code correctly, you will hear a
 sound. 
 
 View ending
 
 At the main menu, press Right(3), Down, R, L. If you entered the code
 correctly, you will hear a sound.
 
 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
 
 At the character selection screen, press R(13), L, R(10), L to unlock
 Freak E. Deke and Michael Jackson.
 
 Box as Freak E. Deke
 
 Successfully complete arcade mode to unlock Freak E. Deke.
 
 Box as Michael Jackson
 
 Successfully complete arcade mode two times to unlock Michael Jackson.
 
 Box as G.C. Thunder
 
 Successfully complete arcade mode three times to unlock G.C. Thunder.
 -From: st0rmf1707@aol.com
 
 Box as Wild "Stubby" Corley
 
 Successfully complete arcade mode four times times to unlock Wild
 "Stubby" Corley. -From: st0rmf1707@aol.com
 
 Box as Shaquille O'Neal
 
 Successfully complete arcade mode five times to unlock Shaquille
 O'Neal. -From: st0rmf1707@aol.com
 
 Box as Freedom Brock
 
 Successfully complete arcade mode six times to unlock Freedom Brock.
 -From: st0rmf1707@aol.com
 
 Box as Rocket Samchay
 
 Successfully complete arcade mode seven times to unlock Rocket
 Samchay. -From: st0rmf1707@aol.com
 
 Box as Robox Rese-4
 
 Successfully complete arcade mode eight times to unlock Robox Rese-4.
 -From: st0rmf1707@aol.com
 
 Box as Mr. President (Bill Clinton)
 
 Successfully complete arcade mode nine times to unlock Mr. President.
 -From: st0rmf1707@aol.com
 
 Box as The First Lady (Hillary Clinton)
 
 Successfully complete arcade mode ten times to unlock The First Lady.
 -From: st0rmf1707@aol.com
 
 Box as Rumble Man
 
 Successfully complete championship mode with all characters, then
 complete arcade mode on the hard difficulty setting to unlock Rumble
 Man. -From: ka0s@flash.net
 
 Alternate costumes
 
 At the character selection screen, highlight a boxer and press X.
 
 Hidden New Year's costume
 
 Set the system date to January 1 to unlock a Baby New Year's costume
 for Joey T. 
 
 Hidden St. Patrick's Day costume
 
 Set the system date to March 17 to unlock a leprechaun costume for
 the referee. 
 
 Hidden Valentine's Day costume
 
 Set the system date to February 14 to unlock a lover's costume for
 Lulu Valentine.
 
 Hidden Easter costume
 
 Set the system date to April 23, 2001 to unlock a bunny costume for
 Mama Tua. 
 
 Hidden Independence Day costume
 
 Set the system date to July 4 to unlock an Uncle Sam costume for G.C.
 Thunder. 
 
 Hidden Halloween costume
 
 Set the system date to October 31 to unlock a skeleton costume for
 J.R. Flurry. 
 
 Hidden Christmas costume
 
 Set the system date to December 25 to unlock an elf costume for
 Selene Strike and a snowman costume for Rumble Man.
 
 Game Shark Codez:
 
 
 Infinite Money
 EE7F1B83
 000000F0
 
 Player 1 Codez:
 
 Infinite Health
 AF2352EE
 00000064
 
 50% Health
 0D15C35C
 00000064
 0115C35C
 00000032
 
 Low Health
 AF2352EE
 00000000
 
 Infinite Stamina
 01157D90
 00000064
 
 Low Stamina
 01157D90
 00000000
 
 Full Rumble-O-Meter
 6DDB683E
 00000090
 
 Empty Rumble-O-Meter 
 6DDB683E
 00000000
 
 Player 2 Codez:
 
 Infinite Health
 5A777422
 00000064
 
 50% Health
 5A747422
 4070504D
 5A777422
 00000032
 
 Low Health
 5A777422
 00000000
 
 Infinite Stamina
 8F038E50
 00000064
 
 Low Stamina
 8F038E50
 00000000
 
 Full Rumble-O-Meter
 ED471BE1
 00000090
 
 Empty Rumble-O-Meter 
 ED471BE1
 00000000