The Origin

The turtles are very unusual creatures that were mutated by Mutagen Ooze.

The Origin Part 1
There was a little rat that was not named and used to be a pet of a great ninjitsu master. He was on the streets of New York City wondering around. Then a truck came by and swerved all over the street trying to avoid hitting a blind man that a kid saved. Out came ooze from the back of the truck. A boy dropped a jar of 4 little turtles and the jar broke. They were now loose and got mixed up with the left behind ooze.

The Origin Part 2
The rat went up to the turtles now covered in ooze. One of the turtles flung ooze onto the rat. The rat took the turtles with him and took care of them. The next morning the rat was all mutated and the turtles were starting to mutate too. Days past and the turtles were walking on two feet and talking. The turtles started to call the rat "Splinter". Then they grew up to be mutant turtles.