Password notes
Use the following key when entering the passwords:

L: Leonardo
M: Michaelangelo
D: Donatello
R: Raphael
S: Shredder
Invincibility
Enter "MDLDSSLR" as a password.

Infinite Shuriken
Enter "LMDRRMSR" as a password.

Max Ougi
Enter "RRDMLSDL" as a password.

Shuriken Loser
Enter "LLMSRDMS" as a password. Shuriken will no longer be available.

Endurance
Enter "DMLDMRLD" as a password. Healing items will no longer be available.

Sushi Party
Enter "SLLMRSLD" as a password. All healing items will turn into Temaki Sushi.

Instant Death
Enter "LDMSLRDD" as a password. One enemy hit will kill the turtles.

Enemies 2X Power
Enter "MSRLSMML" as a password.

Enemies 2X Defense
Enter "SLRMLSSM" as a password.