Water

Wheel is One of Kirby's Copy abilities. This one is unique to the anime, and has so far not appeared in any game. (Except for the similar Bubble ability.) Though there are rumours that it will feature in the upcoming Kirby game for the Nintendo Wii, though it's likely that it is being mistaken for Bubble.

Along with Top, Iron and Baton Twirling, they all appeared in episode 097 of the show, and were all created by fans! There was a contest in Japan to submit your own Copy Ability ideas, and this was one of the lucky winners.

Kirby: Right Back At Ya!
Water Kirby's body changes to what looks like a translucent blue gel, with a golden crown containing a cresting wave on his head. Naturally, Water Kirby attacks by spitting geysers of water to blast the enemy away