Teenage Mutant Ninja Turtles Unlockables

Finish level 1 as Raphael to unlock Casey Jones in versus mode. He does not have any Dojo missions in his story and does not get nearly as many intermission sequences as the turtles, but he is much stronger. Also, you cannot have another player play as your "assist" character when you are Casey Jones. He is the best all-around single player character, as he takes out most enemies with a single hit.

Finish level 3 as Raphael, Donatello, Michaelangelo, or Leonardo to unlock the Evil Turtlebot in versus mode.

Finish level 6 as Michaelangelo to unlock Hun in versus mode.

Defeat Saki as Raphael, Donatello, Michaelangelo, or Leonardo to unlock Oroku Saki in versus mode.

Defeat Shredder as Raphael, Donatello, Michaelangelo, or Leonardo to unlock Shredder in versus mode.

Finish Dojo level 3 as Leonardo to unlock Splinter in versus mode.

Finish Challenge Mode as Raphael, Donatello, Michaelangelo, or Leonardo to unlock Yoshi Hamato in versus mode.

Set the PlayStation2 system date to December 25 to see the turtles with a Christmas theme. Set the PlayStation2 system date to October 31 to see the turtles with a Halloween theme.

Finish the third Dojo Stage with all four turtles to learn the Secret of Gembu move. Use it to damage everyone on the screen. REMEMBER: This can only be done three times per level.

If you are Casey, press the button used for shruriken, and he will start talking.