How many movies have Kei Ohashi and Shin-ichiro Miki collaborated on?

They have worked on 2 movies together! Their first movie together was Mobile Suit Gundam 00 The Movie: -A Wakening of the Trailblazer- (2010) while their highest rated movie together was Pokémon the Movie: Hoopa and the Clash of Ages (2015). They have not worked together since Pokémon the Movie: Hoopa and the Clash of Ages (2015).