Something in the way while you're walking through the city? Here's an easy solution: send it flyin' with a Master Action! Mm-mm-mmm... It's the little pleasures in life.
I've worked a few odd jobs during my travels, and they all helped me with my training. You should take up a part-time job during your World Tour, as well.
An alternate form of combat, with an alternate path to victory. Get 20 wins in Avatar Battles. But don't obsess over the results. Let experience be your guide.
Kung fu is the result of ceaseless training. Do anything enough times, and you'll see results. So will you, once you fight in the Battle Hub 100 times.
Where's your face, dingus? Get your butt to the avatar creator and sort yourself out! Crying shame we can't fix that attitude of yours while we're at it.