From Bulbapedia:
"James Turner (Japanese: ジェイムス・ターナー) is a British graphic designer who worked at Game Freak. In 2010, he became the first Westerner to officially design Pokémon.

Turner designed Pokémon for Pokémon Black and White, Pokémon X and Y, Pokémon Sun and Moon, Pokémon Ultra Sun and Ultra Moon, and Pokémon Sword and Shield; he was also the Art Director for the latter. Additionally, he directed the 2012 Nintendo 3DS eShop title HarmoKnight and the 2015 video game published by Sega, Tembo the Badass Elephant.

Before joining Game Freak, James Turner worked for eight years at Genius Sonority and was credited under the name Jamie Turner (Japanese: ジェイミー・ターナー). Turner designed all the characters for Pokémon Battle Revolution and oversaw the designs of the different outfits.

On June 9, 2022, Turner announced that he had left Game Freak to form his own game studio, All Possible Futures."

Characters designed by James Turner

• lucy fleetfoot (Pokémon Trozei)
• professor sada
• professor turo

Pokémon designed by James Turner

• gigantamax pikachu
• gigantamax gengar
• shadow lugia
• galarian zigzagoon
• galarian linoone
• obstagoon
• vanillite
• vanillish
• vanilluxe
• golett
• golurk
• vullaby
• mandibuzz
• phantump
• trevenant
• buzzwole
• guzzlord
• poipole
• naganadel
• centiskorch
• gigantamax centiskorch
• sinistea
• polteageist