Teenage Mutant Ninja Turtles

Fifteen years ago, a canister containing a mysterious mutanagenic ooze collided with a fish bowl containing four baby turtles. Falling into the sewers, the terrapins came in contact with the ooze. Doubling in size by the next morning, the four amphibians were taught the way of the ninja by their Master, Splinter, himself a mutant rat!

Splinter named the shellbacks after the renaissance painters Leonardo, Michelangelo, Donatello and Raphael, and they have hence been known as the Teenage Mutant Ninja Turtles!

Goin' Green
The turtles defeated Fin Fang Foom in the first round, and Green Goblin in the second.