Earlier this year, Professor Willow and Professor Oak teamed up to research the new Mythical Pokémon Meltan and Melmetal. This was presented in the form of a mini series called The Two Professors, which consists of three episodes in total. As the title suggests, Professor Willow and Professor Oak were the stars of the show and were equipped with voices. Ben Diskin is the voice actor behind Professor Oak and Robbie Daymond is the man behind Professor Willow.
Source: IMDB.com
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