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About : Yukinari Ookido (Professor Samuel Oak in the English and Italian version, Professeur Chen in the French version and Professor Carvalho in the Brazilian version), is a Pokémon researcher, and generally considered the best of his kind. As such, his role in the Pokémon games and anime is that of a mentor to young Pokémon Trainers, a source of information and an occasional plot device. Amongst other things, he is credited with inventing the Pokédex. Although he is an expert on all matters relating t...