How many movies have Ikue Otani and Satoshi Ohta collaborated on?

They have worked on 4 movies together! Their first movie together was Pokémon: Mewtwo Returns (2001) while their highest rated movie together was Pokémon: Arceus and the Jewel of Life (2009). They have not worked together since Pokémon: Zoroark - Master of Illusions (2010). They are most known for their fantasy films together.