Which engine powered Pokémon Pokopia?

Katana Engine powered Pokémon Pokopia.

The Katana Engine is listed as the game’s engine in its development credits. An engine is the underlying technology used to support systems such as rendering, physics, animation, asset handling, and other interactive features. The engine is separate from the game’s genre and from the companies that developed it.

Pokopia was co-developed by Game Freak and Koei Tecmo’s Omega Force. Its sandbox design required systems for construction, environmental changes, habitat creation, and interaction with many Pokémon. The game also supports a real-time day-and-night cycle and multiple biomes.

Players may associate the title with engines commonly used by other major games, but the credited engine is Katana Engine. The answer is therefore not Game Freak, Omega Force, or Nintendo: those are companies connected with development or publishing, while Katana Engine identifies the technology used to build the game.