The Monochromatic Pinchipede is killed just the same way as you would for the Emperor Pinchipede. The only difference is that you need to be more careful due to its high speed and larger health. Begin by targeting the smaller segments of its body. These smaller segments have significantly more health than the larger ones ironically, because the larger ones turn into spiked platforms that spin rapidly around the arena. Eventually, the last weak spot will reach 0 HP, and the Monochrome Pinchipede will be slain.