Omega Force's earlier sandbox work helped Game Freak develop Pokémon Pokopia. Game Freak partnered with the Koei Tecmo studio because Omega Force had experience with sandbox games, including Dragon Quest Builders 2.
Pokopia grew from the idea that players should be able to cultivate their own Pokémon habitats. That concept required systems for collecting materials, constructing buildings, arranging objects, restoring landscapes, and attracting Pokémon. Game Freak had deep Pokémon expertise but wanted additional experience in the sandbox genre.
Omega Force was therefore chosen to co-develop the project. Its involvement was not simply a publishing arrangement: the studio contributed development experience relevant to the game's construction-focused design.
Dragon Quest Builders 2 is a useful neighboring fact because it explains the partnership's rationale. However, it was not the name of the Pokémon game being developed. Pokémon Pokopia is the project that combined Game Freak's franchise knowledge with Omega Force's sandbox background.