Last Dark One

The Last Dark One is the true main antagonist of the 2009 animated film Futurama: Into The Wild Green Yonder.

Evolution
The Dark Ones have evolved from either a race of frogs or snakes. For many centuries they have evolved into the Martian Muck Leech.

Martian Muck Leech
The Last Dark One was unknowingly found by Leela and used as a mascot for the Feministas.

Quotes

 * "Where are your crappy rhymes now, Frida Waterfall?"
 * "Not Leela, you moron! ME!"

Trivia

 * The Last Dark One has three voice actors: Maurice LaMarche (animal vocal effects), Billy West (thinking voice) and Phil LaMarr (speaking voice).