Duck "Bill" Platypus

Downunda Freedom Fighters' fiestiest member, Duck "Bill" Platypus is a born fighter. Following their second victory over Crocbot, Bill was brainwashed by the robot's remains. He began expressing random fits of anger, and eventually went renegade. Unbeknownst to his fellow freedom fighters, Bill had become Crocbot's slave. He helped recruit a horde of other platypuses to do his master's bidding; The severed torso of Crocbot remained hidden and waiting to be rebuilt.

Bill led repeated ambushes against his old team. After luring them into an ambush under the pretense of a truce, Bill captured Guru Emu and Wombat Stu, prompting the DFF to send for help. Sonic and Tails traveled to the crater where Crocbot had been destroyed prior, and found a slave labor camp where the duckbill army using as a site for Crocbot's new base. The Freedom Fighters managed to unearth Crocbot's remains and pull him offline, removing any hypnosis from Bill and the others.