The city was located in the Kalos region in the Pokémon X/Y games for Nintendo 3DS.
The trailer teases that similarly to how the previous Pokémon Legends: Arceus game featured the history of Pokémon Diamond/Pearl’s Sinnoh region, Pokémon Legends Z-A can explore the past of Pokémon X/Y’s Kalos region.
The colors in the “Z-A” portion of Pokémon Legends Z-A’s logo match that of a legendary Pokémon from the series’ sixth generation Zygarde.
The game takes place in the Hisui region, the past version of the Sinnoh region from the Pokémon Diamond and Pokémon Pearl games.