Enter the following codes at the password screen to unlock the corresponding effect (these codes do not work in Tournament mode). Each letter stands for the first letter of the Turtle's name (plus the Shredder 'S').

New outfit for Donatello:
D, S, L, R, D, R, M

New outfit for Leonardo:
L, M, R, M, D, R, D

New outfit for Michelangelo:
M, L, M, R, D, R, M

New outfit for Raphael:
R, M, S, R, M, D, R

Take no damage:
L, S, D, R, R, D, R

Stamina doesn’t restore:
M, R, M, D, R, M, D

Health:
D, S, R, D, M, R, M

Fatal Blow:
L, R, S, R, D, R, D

Infinite Shuriken:
R, S, R, L, R, S, M

No Shurikens:
R, L, M, R, D, S, L

Poison:
D, R, S, L, L, S, R

Self Recovery:
D, R, M, S, R, L, R

Squeaking:
M, L, D, S, R, D, M

Defense Doubled:
L, D, R, M, R, L, M

Offense Doubled:
S, D, L, S, R, L, L

Super-Tough:
R, D, S, R, M, R, L

Toddling:
S, S, S, M, R, D, D

Abyss, you lose all health for falling:
S, D, S, D, R, L, D

Nightmare, enemy attacks are doubled:
S, L, S, D, R, D, L

Health items are all full pizzas:
M, R, L, M, R, M, R

Playmates added to Bonus Materials:
S, R, M, L, D, D, R


Unlock Extra Characters
To unlock extra characters in the game complete the following tasks.

Unlock Karai (replaces Michaelangelo):
Beat Karai in Foot Fight Tournament within 150 seconds.

Unlock Slashuur (replaces Leonardo):
Beat the battle Nexus Tournament.

Unlock Casey Jones (replaces Raphael):
Beat Open Brawl Tournament.

Unlock Splinter (replaces Donatello):
Clear level 11-7.