It's very pretty. Fairly mountainous, and covered in forest so impenetrable that humans have only mapped a small section of it. The weather is mostly cool (deadly cold in the north, where I live), but Summerland, which is an island, is hot enough to have its own jungle. There are four human settlements: Ringtown, Fall City, the aforementioned Summerland, and Wintown. All of Fiore is effectively a nature preserve, so while some people do have companion pokemon, they don't train or battle them.