How many movies have Kunihiko Yuyama and Yōichi Kotabe collaborated on?

They have worked on 9 movies together! Their first movie together was Pokemon Crystal: Raikou, the Legend of Thunder! (2001) while their highest rated movie together was Pokémon: Arceus and the Jewel of Life (2009). They have not worked together since Pokémon the Movie: Hoopa and the Clash of Ages (2015). They are most known for their animation films together.