Enter Splinter, Michaelangelo, Raphael, Donatello, Michaelangelo as a password.

Enter Splinter, Michaelangelo, Raphael, Donatello, Leonardo as a password.

Enter Splinter, Michaelangelo, Michaelangelo, Raphael, Splinter as a password.

Successfully complete level 6 with Michaelangelo to unlock Hun in versus mode.

Enter Splinter, Splinter, Splinter, Michaelangelo, Raphael as a password.

Enter Raphael, Raphael, Leonardo, Michaelangelo, Donatello as a password. Hold L1
or R1 when selecting Michaelangelo at the character selection screen.

Set the PlayStation 2 system date to December 25 to see the turtles with a Christmas
theme. Set the PlayStation 2 system date to October 31 to see the turtles with a Halloween
theme.

Enter Raphael, Donatello, Splinter, Raphael, Leonardo as a password.

Enter Michaelangelo, Splinter, Raphael, Michaelangelo, Michaelangelo as a password.

Successfully complete level 3 with Raphael, Donatello, Michaelangelo, or Leonardo to
unlock the Evil Turtlebot in versus mode.

Enter Splinter, Raphael, Splinter, Michaelangelo, Michaelangelo as a password. Hold
L1 or R1 when selecting Donatello at the character selection screen.

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

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

Enter Leonardo, Raphael, Michaelangelo, Donatello, Splinter as a password.

Enter Leonardo, Michaelangelo, Leonardo, Splinter, Donatello as a password.