Bonus Characters
Each time you beat the game a secret character is unlocked. Below is a list of characters and the corresponding games you have to beat.

# of times to beat the game	Secret character
1	Freak E. Deke
2	Michael Jackson
3	G.C. Thunder
4	Wild "Stubby" Corley
5	Shaquille O'Neal
6	Freedom Brock
7	Rocket Samchay
8	Robox Rese-4
9	Bill Clinton
10	Hillary Clinton
10*	Rumble Man

* After completing 10 times, complete once more on the hard difficulty to unlock.

Various Codes
Enter any of the following codes at the character selection screen. A sound will confirm correct code entry.

Effect	Code
Huge Gloves	Left, Right, Up, Down, R, L
Fat Boxers	Right(2), Up, Down, Right, R(2), L
Skinny Boxers	Right(2), Up, Down, Right, R, L
Zombie Boxers	Left, Up, Right, Down, R(2), L

Champion Costumes
Win the game in championship mode to unlock the champion costumes.

Bonus Costumes
Set the system date to one of the following to unlock a bonus costume:

Costume	For...	Date
Baby New Year's Costume	Joey T.	January 1
Leprechaun St. Patrick's Day Costume	The Ref	March 17
Lover's Valentine's Day Costume	Lulu Valentine	February 14
Bunny Easter Costume	Mama Tua	April 23, 2001
Uncle Sam Independence Day Costume	G.C. Thunder	July 4
Skeleton Halloween Costume	J.R. Flurry	October 31
Elf/Snowman Christmas Costumes	Selene Strike/Rumble Man	December 25

Specials

Afro Thunder	DF + RH, LH, RL LH, LH, RH, RH, RH U/D + LL, RH
Angel "Raging" Rivera	F + LH, LH, LL U/D + LL, RL, LH U/D + RH, LH
"Big" Willy Johnson	LH, LH, RH, RH F, F, B + LH, LL, RL, LL (U, D + LH or D, U + LH), THEN LH, LH, LH, LH
Boris "The Bear" Knokimov	LH, LH, RH F + LL, RH, LH B, F + RL, LH, LH, RH
Butcher Brown	DF + RH, RH, RH RH, LH, LH B + RH, LH
Freak E. Deke	LH, RH, RH, RH B + RH, LH, RH
Freedom Brock	LH, LH U/D + LH, LL, RH RH, RL, RL
G. C. Thunder	LH, LH, RH, RL F + LL + RL, LH, RH LH, LL, RL, RL
Jet "Iron" Chin	U/D LH, RH, LL, RH F + LH, LH, LH DF + LH, LL, RH
Joey T.	RH, LH, LH U/D + RL, LL, RH, RH DF + LH, RH
Johnny "Bad" Blood	U/D + RL, LH, RL DF + RH, LH LH, RH
J.R. Flurry	F + LH, LL, LL, LH U/D + LH, RH, LL RH, RH
Lulu Valentine	LH, RH, RL, RL DF + LH, RH F + LL + RL, RL, RH, RH, LH
Mama Tua	LH, LH U/D LH, RL
Robox Rese-4	LH, RH, RH U/D + LL, RL, RH
Selene Strike	LH, RL, LL F, F + RH, RL, LH B, B + RH, RH, RH
Wild "Stubby" Corley	D/U RL, LH, RH, LL LH, RH, RH F, F + RL, LH, RH

Unlock all characters and their costumes
While you are at the character select screen you can enter:

Left, Right, Left, Left, Right, Up, Down, R, R, R, R, R.

Holiday Easter Egg
Check this out. Load the Dreamcast without a disc, and change the date to a well known holiday from the settings options menus. Now restart the system and load up Ready 2 Rumble. You'll notice that some characters are celebrating the holiday by dressing up with various costumes. Some of the holidays are:

Note that not all the characters will be dressed up, looks like only one character should be in costume. Try more holidays and see what you find.

Cheats