- Alternate costumes
Successfully complete the indicated task to unlock an alternate costume for the corresponding character:

'Back To The Sewer' Casey Jones	Successfully complete Arcade without using a continue or Survival mode with Casey Jones.
Gold Karai-Bot	Successfully complete Survival mode with Karai on the Normal difficulty or higher.
Cyber Foot Ninja	Successfully complete Survival mode with Foot Ninja.
Splinter	Successfully complete Arcade without using a continue or Survival mode as Splinter.
'TMNT 2003' April O' Neil	Successfully complete Arcade mode without using a continue or Survival mode with April.

- Bonus characters
Successfully complete the indicated task to unlock the corresponding character:

Karai	Successfully complete Arcade mode.
Fugitoid	Successfully complete Missions 1 through 50.
Shredder	Successfully complete Arcade mode.
Foot Ninja	Successfully complete Arcade mode.
Raving Rabbid	Successfully complete 120 Versus mode matches.
Nightwatcher	Successfully complete Arcade mode.
Splinter Rabbid	Successfully complete 90 Versus mode matches.
Utrominator	Successfully complete Arcade mode.

- Artwork
Successfully complete the indicated task to unlock the corresponding artwork:

Cartoon Concept	Successfully complete all figures in the trophy room.
4Kids Illustration	Successfully complete Arcade mode with all characters.
TMNT 2007 Artwork	Successfully complete Survival mode with Nightwatcher.
Early Concept	Successfully complete Survival mode.
Comic Book Covers	Get 777 Shells.
Unproduced TMNT 4 Concept	Successfully complete 40 missions in Mission mode.
Video Game Concept	Get 555 Shells.

- Activate Cheats
At the main menu, select the 'Bonus Content' option. Then, enter one of the following codes to obtain the corresponding effect. If you entered the code correctly, you will hear a sound.

Ninja Rabbid and Underground stage Push Up two times, Down three times, Right, Up, Left, Right, Left to unlock Ninja Rabbid and the Underground stage.
Shredder and Cyber Shredder alternate costume Push Up, Down, Right, Up, Down, Right, Left, Up, Right, Down to unlock Shredder and the Cyber Shredder alternate costume.
Four turtle alternate costumes Push Up, Left, Down, Right, Up, Down, Left, Up, Left(2) to unlock four turtle alternate costumes.

- Trailers
Successfully complete the indicated task to unlock the corresponding trailer:

Cartoon	Get 333 Shells.
TMNT	Smash up Trailer
WB	Successfully complete Survival mode with all characters.

- Trophies
Successfully complete the indicated task to unlock the corresponding trophy:


- Bonus stages
Successfully complete the indicated task to unlock the corresponding stage:

Enemy Base	Successfully complete 25 Versus mode matches or 10 missions in Mission mode.
Space Lab	Successfully complete all 51 missions in Mission mode.
Garbage Dump	Successfully complete 125 Versus mode matches.
Warehouse	Successfully complete 95 Versus mode matches.
Western Town	Successfully complete 45 Versus mode matches or 30 missions in Mission Mode.

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