Professor Rowan (Japanese: ナナカマド博士Dr. Nanakamado) is the resident Pokémon Professor of Sandgem Town in the Sinnoh region. He specializes in Pokémon evolution.
Professor Rowan works in Sandgem Town; living with his grandson Lucas. When he was still a young Professor, he left the Sinnoh region to study the Pokémon of Kanto with Professor Oak, after reaching the conclusion that Sinnoh holds far greater secrets. He has a stern personality that makes him seem intimidating and mean, but he is actually very kind and patient. Rowan says he still feels a thrill whenever he travels anywhere with his Pokémon. He apparently has a sweet tooth, as the refrigerator in his laboratory is full of nothing but sweets and candy.
Rowan's particular field of study is Pokémon evolution, having discovered that 90% of all Pokémon are connected in some way to others through evolution. He is also interested in determining if evolution is supposed to be a form of Pokémon reaching maturity, or a way for an "incomplete" being to become "more complete," and the implications that the process has on legendary Pokémon, which don't evolve.