The Official Pokémon Pokédex: The official Pokémon website features the modernized, high-resolution digital vector art overseen by Sugimori for every single Pokémon discovered to date.
For collectors and fans, the physical art book "Ken Sugimori Works" is the holy grail. ken sugimori art book pdf
If you are looking to study his work, there are three primary volumes that are considered the "Holy Trinity" of Pokémon art books. These are the books most commonly sought after in PDF format. ken sugimori art book pdf