"Ken Sugimori (Japanese: 杉森建, born January 27, 1966) is a friend of Satoshi Tajiri and illustrator of the original artwork for Pokémon games. He also has developed conceptual artwork for the movies, and illustrates TCG cards and merchandising." -Bulbapedia article

Sugimori was the art director of the Pokémon games until Pokémon Ultra Sun and Ultra Moon, after which he took on a supervisory role. The art director on the following games, Pokémon Sword and Shield, was James Turner.