Teenage Mutant Ninja Turtles

Very hard difficulty setting:
Press Up(2), Down(2), Left, Right, Left, Right, B, A at the title screen.
Information in this section was contributed by Mitchell Petchul.

Password notes:
Use the following key when entering the passwords.

L: Leonardo
M: Michaelangelo
D: Donatello
R: Raphael
S: Splinter

Casey Jones mode:
Enter SRLMD as a password.

Splinter mode:
Enter LSLML as a password.

Alternate Leonardo costume:
Enter RSLMD as a password. Hold L or R when selecting Leonardo at the character selection screen.

Alternate Donatello costume:
Enter RRSLR as a password. Hold L or R when selecting Donatello at the character selection screen.

Alternate Raphael costume:
Enter SLSMM as a password. Hold L or R when selecting Raphael at the character selection screen.

Alternate Michaelangelo costume:
Enter RLSLS as a password. Hold L or R when selecting Michaelangelo at the character selection screen.

Playmates toy database:
Enter LSDRM as a password.

Alternate sound effects:
Enter DDDML as a password.

Leonardo gains attacking power :
Enter LMLSD as a password.

Raphael gains attacking power:
Enter RDSRL as a password.

Donatello gains attacking power:
Enter DRLDS as a password.

Michaelangelo gains attacking power:
Enter MSRMM as a password.

Michaelangelo has unlimited fire shurikens and pizza always appears:
Enter MSSLD as a password.

Leonardo has unlimited fire shurikens and pizza always appears:
Enter SSLDM as a password.

Raphael has double power-up effects:
Enter RSSSR as a password.

Michaelangelo has double power-up effects:
Enter RLMSM as a password.

Donatello has double power-up effects:
Enter MLSDS as a password.

Leonardo has double power-up effects:
Enter RSDMM as a password.

Donatello has double defense:
Enter MLMLS as a password.

Leonardo has double defense:
Enter LDSMS as a password.

Michaelangelo has double defense:
Enter RLDDR as a password.

Raphael has double defense:
Enter SDRML as a password.

Bonus course 1:
Enter LSMMS as a password.
Information in this section was contributed by ZBDADK.

Bonus course 2:
Enter SSLDM as a password.
Information in this section was contributed by ZBDADK.

Bonus course 3:
Enter MSSLD as a password.
Information in this section was contributed by ZBDADK.

Bonus course 4:
Enter SRLMD as a password.
Information in this section was contributed by ZBDADK.

Bonus course 5:
Enter LSDRM as a password.
Information in this section was contributed by ZBDADK.

Shredder's Tower level:
Complete all levels in normal mode to unlock the Shredder's Tower secret level.