>>56745575An anon theorized that she is from Orre because her name in different languages points to a flower that only grows in Baja California - Mexico and Arizona (both part of Orre), she is bad at throwing Pokeball due to growing up in a region with almost no wild Pokemon and her skin and eyes are similar to the protagonist of Colosseum.
With Lacey's story at least it is confirmed that she lived near Unova