| Abyss |
| Enter SDSDRLD as a password. You will lose all health after falling. Note: This code has no effect in the tournament modes. |
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| Challenge Mode Endurance |
| Enter MRMDRMD as a password. Stamina restore will no longer be available. |
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| Character's Feet Pass Through Wall |
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Whenever you do a wall-jump, look very carefully to see that your character's toes (or sometimes even their feet) are passing through the wall.
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| Fatal Blow |
| Enter LRSRDRD as a password. Enemies have one-hit kill ability. Note: This code has no effect in the tournament modes. |
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| Health |
| Enter DSRDMRM as a password. Your character will always have full health. Note: This code has no effect in the tournament modes. |
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| Infinite Shuriken |
| Enter RSRLRSM as a password. |
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| Lose Shuriken |
| Enter RLMRDSL as a password. Your Shuriken will be disabled. Note: This code has no effect in the tournament modes. |
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| Mighty Turtle |
| Enter LSDRRDR as a password. Your characters will no longer be hurt by damage. |
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| New Nexus Outfit For Donatello |
| Enter DSLRDRM as a password. |
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| New Nexus Outfit For Leonardo |
| Enter LMRMDRD as a password. |
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| New Nexus Outfit For Michelangelo |
| Enter MLMRDRM as a password. |
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| New Nexus Outfit For Raphael |
| Enter RMSRMDR as a password. |
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| Nightmare |
| Enter SLSDRDL as a password. All enemies will have their attacks doubled. Note: This code has no effect in the tournament modes. |
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| Note |
Use the following key when entering the passwords:
L: Leonardo
M: Michaelangelo
D: Donatello
R: Raphael
S: Shredder |
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| Pizza Paradise |
| Enter MRLMRMR as a password. All health items will be replaced by full HP pizzas. Note: This code has no effect in the tournament modes. |
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| Play As Casey Jones |
| Win the Open Brawl Tournament. Alternately, Casey Jones is unlocked five days after a saved game file is created; you can change the system date to do this. Casey Jones replaces Raphael. |
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| Play As Karai |
| Defeat Karai in the Foot Fight Tournament in less than 150 seconds. Alternately, Karai is unlocked thirty five days after a saved game file is created; you can change the system date to do this. Karai replaces Michaelangelo. |
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| Play As Slashuur |
| Win the Battle Nexus Tournament. Alternately, Slashuur is unlocked forty five days after a saved game file is created; you can change the system date to do this. Slashuur replaces Leonardo. |
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| Play As Splinter |
| Successfully complete level 11-7. Alternately, Splinter is unlocked ten days after a saved game file is created; you can change the system date to do this. Splinter replaces Donatello. |
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| Playmates Unlocked In Bonus Materials |
| Enter SRMLDDR as a password. |
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| Poison |
| Enter DRSLLSR as a password. Your character will slowly lose HP. Note: This code has no effect in the tournament modes. |
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| Self Recovery |
| Enter DRMSRLR as a password. Your character will slowly regain HP. Note: This code has no effect in the tournament modes. |
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| Squeaking |
| Enter MLDSRDM as a password. Alternate sounds will play when objects are hit. Note: This code has no effect in the tournament modes. |
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| Super Defense Power |
| Enter LDRMRLM as a password. Your defense will be doubled. Note: This code has no effect in the tournament modes. |
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| Super Offense Power |
| Enter SDLSRLL as a password. Your attacks will be doubled. Note: This code has no effect in the tournament modes. |
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| Super-Tough |
| Enter RDSRMRL as a password. All enemies will have their defense doubled. Note: This code has no effect in the tournament modes. |
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| Teenage Mutant Ninja Turtles Arcade Game |
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Find the Teenage Mutant Ninja Turtles arcade game during Mission 9-1 and use it to play the classic arcade game.
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| Toddling |
| Enter SSSMRDD as a password. Alternate sounds will play when you walk. Note: This code has no effect in the tournament modes. |
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