How many movies have Hatsuki Tsuji and Kimitake Nishio collaborated on?

They have worked on 3 movies together! Their first movie together was Pokémon 3: The Movie (2000) while their highest rated movie together was Pokémon: Arceus and the Jewel of Life (2009). They have not worked together since Hutch the Honeybee (2010). They are most known for their adventure films together.

Hutch the Honeybee (2010)

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Key Animation
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Key Animation

Pokémon: Arceus and the Jewel of Life (2009)

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Key Animation
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Key Animation

Pokémon 3: The Movie (2000)

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Key Animation
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Key Animation