Yin, Yang Who?: Eradicus makes his move to destroy the town after draining Yo's Woo Foo aura. Then he goes after Yin's. Both Yin and Yang embark on a quest to find their parents and retrieve a Woo Foo aura donation, which is the only way to save Yin. Yin and Yang find their dad, who is revealed to be Yo. After Yin and Yang find out Master Yo is their father, Yin asks "If you're our father, who the heck is our mother?" But that is never revealed. Antagonist: Eradicus and his minions