Professor Rowan (Japanese: ナナカマドはかせ Dr. Nanakamado) is a Supporter card. It was first released as part of the Diamond & Pearl expansion.
This card was included in the Diamond & Pearl expansion, first released in the Japanese Space-Time Creation expansion. It was reprinted in the Secret Wonders expansion, previously released in the Dialga LV.X and Palkia LV.X Constructed Standard Decks. A Cosmos Holofoil version of the Diamond & Pearl print was released in the Diamond & Pearl Collection in August 2008. During the DPt Era, it was reprinted in the Japanese Arceus LV.X Deck: Lightning & Psychic and Arceus LV.X Deck: Grass & Fire.
Professor Rowan is one of the only Supporter cards during the DP era of the trading card game with a name in which the second word is not a possessive of the first word, the others being Fossil Excavator and Rival.
Professor Rowan is the Pokémon Professor from the Sinnoh region.