Quick answer — Atsuko Nishida worked on Pokémon: The First Movie (Original Character Design), Pokémon Horizons: The Series (Original Character Design), Pokémon: Lucario and the Mystery of Mew (Original Character Design) and 9 more anime.
Atsuko Nishida worked on Pokémon: The First Movie (Original Character Design), Pokémon Horizons: The Series (Original Character Design), Pokémon: Lucario and the Mystery of Mew (Original Character Design), Pokémon the Movie 2000 (Original Character Design), Pokémon Heroes (Original Character Design), Pokémon 3: The Movie (Original Character Design), Pokémon: Destiny Deoxys (Original Character Design), Pokémon: Giratina and the Sky Warrior (Original Character Design) and 4 more.