Go to Options then go to Password. Scroll through the letters to make the passwords:
Max Ougi- Unlimited Ougi! RRDMLSDL
Instant Death- Die in 1 hit.Ouch. LDMSLRDD
Endurance- no health pickups available on map. DMLDMRLD
Invincibility-Never die or even lose health! MDLDSSLR
Unlimited shuriken- Unlimited shuriken granted. LMDRRMSR
Shuriken loser- shurikens no longer available on maps. LLMSRDMS
Sushi Party- All Health pickups becomes Sushi! SLLMRSLD
Unlock TMNT: Turtles in Time.
Simply complete Episode 1.