Passwords:
Go to the options and then go to the password screen. Next you will see 5 symbols
New Leonardo Outfit LDMSR or RMMLL
New Raphael Outfit DMDML
New Donatello Outfit DDSMS
New Michaelangelo Outfit RRLMD or DLDSM
Defense Doubles for Leonardo MRLLM
Defense Doubles for Raphael LRMDS
Defense Doubles for Donatello SSSMR
Defense Doubles for Michaelangelo MRRML
Power Ups Effect Doubles Michaelangelo MMSLR
Power Ups Effect Doubles Leonardo LSLSR
Power Ups Effect Doubles Raphael SLDSM or MSLLR
Power Ups Effect Doubles Donatello DMDRS
Attack Power Up for Raphael RDSRL
Attack Power Up for Donatello DRLDS
Attack Power Up for Leonardo LMLSD
Max Out Shurikens for Leonardo SMRDM
Max Shurikens and All Pizza for Michaelangelo DRDSS
Sprinter Unlocked for Story Mode MSRLS
Playmates Unlocked in Database LSDRM
New Sound Effects SMMRS
Defense Power up for Michaelangelo MSRMM
Get Challenge Mode Unlocked:
Beat story mode using all 4 turtles
Get Stage Select Levels:
Beat a level to unlock it for Stage Select
Get the Secret of Gembu:
Beat Dojo Stage #3 using all 4 turtles and you get the Secret of Gembu move which will damage all enemies on screen
Get Characters for Vs. Mode:
Casey Jones: Beat Stage 1 with Raphael
Evil Turtlebot: Beat Stage 3 with any turtle
Hun: Beat Stage 6 with Michaelangelo
Splinter: Beat Dojo Stage 3 with Leonardo
Shredder: Beat Shredder with any turtle
Oroku Saki: Beat Saki with any turtle
Yoshi Hamato: Beat Challenge Mode with any turtle
New Costumes:
Change your Xbox System date to Dec 24th or 25th to get Santa outfits or October 31st for Halloween outfits.