Lunala506

The movies usually make up their own places to serve as their settings. In the past, we could usually infer what Region a place was supposed to be in based off of what anime season it aired during (unless it was outright mentioned in the movie, like Alamos being in Sinnoh was), often despite the place's design being based off of a completely different culture than the rest of the Region (Heroes' Alto Mare being based off of Venice, Italy despite the rest of Johto being the most Japanese place in the series, for example).

This doesn't exactly work out for the Power of Us, however, since the two most recent movies have completely detached themselves from the anime, and as such... we have no way of telling. The best I can come up with is that since Fula City is treated like a haven of life in the middle of a wasteland, it might be in Orre, but I doubt that the movies would reference a spinoff like that without being explicitly themed around said spinoff, so...

You gotta point...