I was playing around with this game today and noticed that Ice Kirby has a lot of abilities that you can exploit to make him move much faster. One is his running attack which gives him a little boost when you start the move. It can be canceled easily just by letting go of B; after that you can start up the move again. With decent timing Kirby can go almost twice his speed on the ground. The other ability I think could be pretty fast is his dash dance. Kirby gets a boost when he starts running. If you turn around he will stop running, so when you turn around for the second time he starts running cycle again therefore getting a boost. Again, if you execute this with good timing you could go much faster across the ground. I don't know too much about the knowledge of abilities in this game, so what I am writing right now may be pretty stupid.