Which Pokémon game was co-developed by Game Freak and Omega Force?

Pokémon Pokopia was co-developed by Game Freak and Omega Force.

Game Freak is the studio historically associated with the main Pokémon role-playing series, while Omega Force is a Koei Tecmo development team. Their partnership brought together Pokémon expertise and experience with sandbox-style game design.

Omega Force was chosen partly because Game Freak had less experience in the sandbox genre. The collaboration was recommended by The Pokémon Company, and Omega Force had previously worked on games such as Dragon Quest Builders 2, which also emphasizes construction and world shaping.

The result is a Pokémon spin-off centered on creating habitats rather than battling through a conventional adventure. Shigeru Ohmori served as concept and senior director, while Omega Force director Takuto Edagawa served as chief director, reflecting the joint development structure.