First, I haven't played a Pokemon game is a long time. I'm mostly worried about how fun the game is after you beat it. The old Battle Frontier from Pt/HG/SS was amazing because it had all the different facilities to challenge with all the different gimmicks. It keep me invested in breeding and training post-game. This game just looks like it has one Battle Mansion with nothing but linear battles. I'm afraid it'll get boring with no one else to play with. I want a game that will last a while because I'd be buying a 3DS solely to play this game for a while.

Secondly, how easy is it to trade online with people for version exclusives/non-native Pokemon? GTS complete shit like it was in D/P/Pt? Also, I see the Safari Zone lets you catch a whole bunch of different stuff by just adding friend codes. Can I just add random people I meet online once in a Wi/Fi battle? I'm worried about getting Pokes from other games because I skipped out on B/W/B2/W2. I want a descent Pokedex/selection to choose from.