To hurt him, you have to butt-bounce the top of him. For the first part, dodge his attacks and wait for him to stop attacking. Also watch out for the geysers coming out of the ground. He will now come low to the ground near one of the outer islands. Rev roll to where he is using the ledges as ramps and quickly butt-bounce on him. Repeat and you will face his second form. To dodge, rev roll to a different island than the one he is attacking. After two assaults he hovers around the center. Wait for him to stop moving and butt-bounce. Repeat and you will now face his third form. This form is just like the first form, only it shoots faster and more. Do the same thing as you did to defeat the first form. His fourth form is like the third form, only it shoots even more. The best way to avoid this is to rev roll across the gaps back and forth until he stops. He will hover near the center island in this form. When you hit him once, he starts shooting three shots. If you manage to stay alive for this, he will hover again. Let him have it. You will now face his final form. He is the same as always, only now it is a lot more selective about where you bounce. You have to bounce directly on Clyde, the ghost piloting the thing. After you hit him once, he will do the fire move from his second form; rev roll out of there. Once more and he will be defeated and you will receive the "Golden Pear".