Battler

Count Butler is the main antagonist of the third movie. Butler claims to be a genius zoologist but is really nothing but a poacher looking for the Crowning Treasure horns on Crown Island, killing many innocent animals on his quest to find them. He is able to manipulate animals known as Horn Eaters to attack by playing his violin (which also affects Luffy since his brainwaves are the same as an animal's). Butler was also responsible for the death of Mobambi's father. When he manages to get the horns and eats them, he becomes a huge hulking monster from the horn's power. However he's beaten when Luffy manages to crush his horns, turning Butler back into a human, then uses his Gomu Gomu no Bazooka to knock Butler off the island.

Trivia

 * The writing on the back of his Jacket reads "EVIL". This becomes a joke upon arriving as he tells Luffy and crew that he's a good guy.