Leatherhead appears in the 2012 TV series. He is an ally to the Turtles and has also become Slash's second-in-command in the Mighty Mutanimals. In this series, Leatherhead made his debut appearance in the episode It Came From The Depths.
Obviously, don't nominate any human characters. Hybrids like Cheetah or The Lizard are okay, as are shapeshifters with one set animal form (eg Professor McGonagall.)
