Negaduck

Role in the series
Negaduck is the main villain from Darkwing Duck, and he is now planning to destroy Pooh with the aid of Maleficent and his own goons: Moliarty, Bushroot, Steelbeak, Megavolt, Liquidator, Dr. Fossil, and Quackerjack. Negaduck was also responsible for creating the virus that created Wendigomon and Diaboromon from the DNA of Xemnas. When he appears, it always means that the heartless are nearby.