Teenage Mutant Ninja Turtles II: The Secret of the Ooze (1991)

Description
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The Turtles find out where the ooze, the substance which mutated them fifteen years ago came from. Unfortunately, Shredder learns about it and uses it to enhance himself and two new mutants, Tokka & Rahzar. So the Turtles have to prove again who's the better ninja fighter and save New York once again.