My Sora was level 89 and Riku was 62. For me the reason my levels were high for Sora was because I was trying to find 0 cards for the final battle, every time I tried I always died and realized, "Crap, maybe I shouldn't have gotten rid of my 0 cards." I love learning the hard way. With Riku, it was just too easy leveling him up I think, he's a powerful character...and besides, you don't have to worry too much about the cards in battle...at least I don't.