Teenage Mutant Hero Turtles Cheats

Believe it or not the famous Konami Code works here as well. Though it won't give you extra lives it will give you extra continues.
Just enter the following code at the title screen.

The Giant Mouser at the end of level 4 can be beaten even more easily than normal with this trick. Just stand under him and wait for his mouth to open. When his mouth opens to reveal the "weak spot", pause the game. Unpause the game, and the Mouser's mouth will be closed again, but his weak spot will be slightly visible from behind his mouth. You can now hit it to cause damage while his mouth is closed! Repeat this every time he opens his mouth for an easy victory.

Find a doorway that has a pizza slice or full pizza right at the beginning. Enter, grab the pizza, and exit. If you go back in the pizza will regenerate. Use this to restore power to all your turtles.

When you fight Rockstedy jump on top of the ledge on the right side of the screen, switch to Donatello and just attact downward. Everytime Rocksteady jumps he will take damage and you will get by without a scrape. This will work faster if you time your attacks with his jumps.