What has the united states got to do with this anyway? I don't get it.. You think that Braviary is only used because an eagle "in america" represents freedom to some? And THUS is relevant to the plot? Why put the US in that sentence anyhow.. It would be perfectly fine if you just wrote: To some, eagles represent freedom, so it is fitting for N to rescue one from slavery/plasma. The US has absolutely nothing to do with this issue.
Unova is based on the geography of New York City, not the United States.. Yes, there are some influences of American culture, and Castelia City is based on NewYork, but that doesn't equate Unova = usa.