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El Hippo, the animal-born mutant Hippopotamus, is a common enemy in Teenage Mutant Ninja Turtles: Mutants Unleashed.
El Hippo (TMNT: Mutants Unleashed)
Hippopotamus
for Hippopotamus in Zoo
Suggested by matiasramonsanchez
All the animals you can find at the Zoo. If you don't find what you looking for, you can check my other stories : Aquarium and Prehistoric Museum.
