Mr. Patch

Mr. Patch first appeared as a boss in Banjo-Tooie,in the Witchy World level.You would defeat him by shooting grenade eggs at his patches.Although you can do this on the ground at first,you will eventually have to hit him in the air. He will also be one of the bosses fought in an airplane in Nuts and Bolts as shown in a gameplay trailer.

http://images.wikia.com/banjokazooie/images//8/82/Banjo-tooie_004.jpg