Playing Neo: The World Ends With You for the first time. Any tips or tricks?

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What I love about the Week 2 ending is that we fight Susukichi again right, and at the end of Week 1 I kept freaking losing to him my pins and characters were so weak, by the time I won it was by the skin of my teeth. But by week 2's end I had become so powerful (not to mention was on to his tricks) that I pretty easily beat his ass, losing only half my HP in the process. Feels good.
http://i.imgur.com/0UFI0T9.jpg