Huh, it seems I'm the odd one out in that the Battle Factory was my least favorite facility. Again, I'm not saying it's bad if you like the Battle Factory, if you do, hey, more power to you, but it just isn't for me. The thing that makes me dislike the Battle Factory is, well, the appeal of Pokemon to me. Pokemon's best aspect, at least in my opinion, is raising your own team of Pokemon and seeing them progress, and nothing is more rewarding then seeing your team you built yourself blitz through the Battle facilities, and Rental Pokemon just kinda go against that, but hey to each their own. I'm still hoping for the entire Frontier to make a comeback, as if it was just the Battle Tower it'd be quite the letdown. Emerald's Battle Frontier is one of the best Post-Game features in the series in my opinion, it was the thing that kept me playing as long as I did, so it'd be great to see it again.