The soccer one was actually quite easy for me. I focused on mainly using one Pokemon at a time to score goals, using the other two to block my goal and repel soccer balls. I typically find it easier to keep track and control that way.
As for me, my banes are some of those damn time-test medals. Pain in the ass, is what they are...
Yeah, Black & White really over-forced the whole Wi-Fi crap. I hope B&W2 is less Wi-Fi intrusive... Don't get me wrong, I like the idea of what B&W was aiming for, it was just way overdone.