Teenage Mutant Ninja Turtles 3: Mutant Nightmare (Nintendo DS)
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Alternate Ending Picture
Collect all gems in Story Mode.
Cowabunga message
Press Up(2), Down(2), Left, Right, Left, Right, B, A at the title screen. The turtles yell "Cowabunga!".
Donetello Picture
Complete mission mode with Donetello.
Leonardo Picture
Complete mission mode with Leonardo.
Michaelangelo Picture
Complete mission mode with Michaelangelo.
Password notes
Use the following key when entering the passwords:
L: Leonardo
M: Michaelangelo
D: Donatello
R: Raphael
S: Shredder
Rapheal Picture
Complete mission mode with Rapheal.
Turn crystals into bird eggs
Enter "SRDSLLMS" as a password.
Turn crystals into pumpkins
Enter "DRSSMRLD" as a password.
Turn crystals into snowmen
Enter "LLDMSRMD" as a password.
Unknown Code
Enter "DDRMLRDS" as a password.