Quack Pack
Agent X (voiced by Kath Soucie) - A feminine robot assassin working for an unnamed criminal organization, Agent X appears in "Heavy Dental". Thinking he's visiting the dentist, Huey gets an experimental mind-control helmet attached to his head when the doctor in charge mistakes him for Agent X in disguise. As Huey quickly discovers and abuses the helmet's power, Agent X is sent to terminate him and retrieve the device. She chases Huey back to Donald's house, where the duck is trying (and failing miserably) to fix the kitchen plumbing. Once inside, the pipes burst and drench Agent X in a torrent of water, completely rusting her.