Oh, ok. Gym apps are usually handled on UPN though, so yeah. Also, UPN is just another forum to do the same stuff here. There's just cooler people there. So if you're a TL4 here, you're a TL4 there and all battle records and stuff apply in both forums.
It is much better than Serebii, but you'll see that yourself when you join and get involved a bit. As for the gym thing, don't get too ahead of yourself. Becoming a Gym Leader is a long road from TL1. And only 3 active members have legendaries at the moment: Mercutio has a Zapdos, Dave has a Raikou, and Kuno (Forum Admin of UPN) has a Latias and Articuno.
Uhh, right now I'm working on the few left I can get in my own game... Looking for a female Combee for Vespiquen at the moment. I also need the starter fire type, Keldeo, Gliscor, and... I think there's one I'm missing, but pretty much those.