Dr. Yung (Voiced by Billy Regan) is the main antagonist of Pokémon: The MasterMind Of Mirage Pokémon. Dr. Yung invites Ash and his friends, as well as Professor Oak, to visit him at the Mirage Mansion so he can demonstrate his Mirage System to them. He later challenges Ash and Misty to battle with him using a Mirage Aggron his system had generated. Misty eagerly accepts his challenge and uses her Staryu, but she is easily defeated when Aggron demonstrates one of the Mirage System's features – the ability to use any attack, in this case Bullet Seed. Ash challenges him next with Pikachu, but before the battle can begin, the Mirage Master captures both Dr. Yung and Professor Oak by commandeering the system. But, Dr. Yung staged this as a trick to get all the Pokémon data to create a mirage of Mewtwo. After being defeated, he escapes into his burning lab. Oak tries to pursue him, but falling iron blocks the entrance, and Yung is never seen again.
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