Which engine is listed in the credits for Pokémon Pokopia?

Pokémon Pokopia is listed as using the Katana Engine.

An engine is the underlying software framework that supports a game's technical systems, such as rendering, world management, input, and other development tools. Pokopia's credits identify Katana Engine rather than a widely licensed middleware name such as Unity or Unreal Engine.

The engine listing is separate from the game's genre and platform. Pokopia is a social simulation game released on Nintendo Switch 2, but those facts do not identify the technology used to build it.

Engine details are often overlooked because players experience the finished graphics and systems rather than the tools behind them. In Pokopia's case, the Katana Engine is a specific credit entry, making it a precise technical fact rather than a description of the game's cozy visual style.