orcishgamer: Confirmed, it looks like the persons residing in Black City/White Forest have a lot to do with what you can catch as well as the season.
Roberttitus: When I got to White forest hardly anyone was there.... there was 1 house with like 5 people inside, 2 people outside & a pokemon center. Also there were no Pokemon encounters there like I heard there was... whats up with that?
How many people exist there is based on how long you took to complete the story (so the strategy guide says, hey it was collector's edition and had an Unova Pokedex, plus I got it for free!). To get more (and more trees and grass patches), you use the Entralink to invite people from Black City (in Pokemon Black) to live in White Forest. You can have up to 10, somewhere there's a list of what spawns with each person as a resident.
Also, if you don't speak to them every couple of days, even the existing ones disappear. What a bunch of disloyal toolbags!
Yeah, I had Toasty (Emboar) and everything I had was weak to one of those attacks as well. I couldn't do it even with revives, eventually he crit a Surf and knocked out my last Pokemon that would have normally survived one hit.