Ken Sugimori (Japanese: 杉森 建, Hepburn: Sugimori Ken, born January 27, 1966 in Fukuoka, Japan) is a Japanese video game designer, illustrator, manga artist, and director. He is best known as the primary character designer and art director for the Pokémon franchise. Sugimori is also credited with the art direction for other titles, including Pulseman. Sugimori drew and finalized all of the original 151 Pokémon. He has also worked on the various Pokémon films, trading cards, and other games like the Super Smash Bros. series.
Source : Wikipedia