Speedster

The Speedster is a boo in Super Mario Galaxy with a racing helmet. Mario first meets him in the Ghostly Galaxy, He must use Pull Stars to navigate through the track. He meets him again in the Boo's Boneyard Galaxy. Here he is Boo Mario and must race through a tunnel. When Mario meets the Speedster, he calls the Power Star "it", assuming Mario is also after "it". If you reach the finish area first, he gives you the Power Star.