King Flyer (キングフライヤー Kingu Furaiyā?) is a giant fly Mechaniloid that appear as a sub-boss in the Mega Man ZX series. It is operated by remote control and uses a special chemical fuel called Methanhydrate (メタンハイドレート Methanhydrate? a mistranslation of methane hydrate). It was put into production a short time before Mega Man ZX and only a few exist. In Mega Man ZX they are green and in Mega Man ZX Advent they are blue.