Teenage Mutant Ninja Turtles Cheats

Set your PS2 date to Dec. 25 or Oct. 31

Go to the title screen and press
Up, Up, Down Down, Left, Right, Left, Right, X, Circle.  The
word "yeah" will appear if you did the code correctly and story mode
move sounds will change

When you select Michaelangelo and pick up a recovery item such as pizza, etc., he will have Leonardo's voice instead of his original one.

Put in SMDRL at the password option. Then play the game and you will never get hurt.

DMDML Raphael Alternate Costume
LDMSR Leonardo Alternate Costume
RRLMD Michaelangelo Alternate Costume
DDSMS Donatello Alternate Costume
RDSRL Raphael Attack Power Up
LMLSD Leonardo Attack Power Up
SMRDL Michaelangelo Attack Power Up
DRLDS Donatello Attack Power Up
LRMDS Raphael Defense Doubles
MRLLM Leonardo Defense Doubles
MRRML Michaelangelo Defense Doubles
SSSMR Donatello Defense Doubles
SLDSM Raphael Double Power Up
LSLSR Leonardo Double Power Up
MMSLR Michaelangelo Double Power Up
DMDRS Donatello Double Power Up
DRDSS Michaelangelo Unlimited Fire Shurikens
SMRDM Leonardo Unlimited Shurikens
LSDRM Unlock Playmates Toy Data Base
MSRLS Unlock Splinter (Story Mode)
SMMRS New Sound Effects

Change your PS2 System date to Dec 24th or 25th to get Santa outfits or October 31st for Halloween outfits.