Had a look with the search function, and discovered that the thread for discussing Black City and White Forest was last posted in sometime in September. As I'm not one for bumping threads, I figured a new one might be in order.
So, yeah. Discuss Black City and White Forest here.
Now, on New Years' Eve, after giving up a lengthy Axew MMing project, I discovered to my dismay that my Black City had been abandoned. I had worked diligently since the game's release to keep that place packed with the maximum occupancy of 10 trainers, so it was a pretty harsh blow to me. I'm in the process of repopulating it, but in doing so, I've noticed something odd. Whenever I talk to a trainer in White Forest who is one of the trainers I formerly had in Black City, even though I am 110% certain it's still not at maximum occupancy, I can't invite that trainer. I'll give you an example: One of the trainers I had in Black City was Ace Trainer Vincent, or, as some of you might know him better as, that Ace Trainer with the Magmortar. I found him in my White Version's White Forest, and yet, I was unable to invite him to Black City. But I was allowed to invite almost everyone else; that Battle Girl with Slaking, the Black Belt with a Machamp, that Aggron-using Hiker, and so on. Didn't really know that could happen.
Black City is also my favorite location in the Pokémon world. I love how the buildings look, I love the music, and I love the automatic daily rematches. The only thing that would make it better is if you could rebattle the Rotation Battle trainers in the shop. EDIT: Oh, and if the Pokémon Center had been redesigned to look like a Black City building.