How many movies have Satoshi Tajiri and Yuji Ueda collaborated on?

They have worked on 18 movies together! Their first movie together was Pokémon: The First Movie (1998) while their highest rated movie together was Pokémon: Arceus and the Jewel of Life (2009). They have not worked together since Pokémon the Movie: Mewtwo Strikes Back - Evolution (2019). They are most known for their adventure films together.