Marx is the final boss from Kirby Super Star. He tried to use the mechanical comet known as Nova to take over Pop Star. He also got wings when Nova was about to grant his wish. Does that make him some sorta evil bat-jester or something? Kirby eventually defeated Marx, causing Marx to fall into the damaged part of Nova, causing Nova to explode. Marx later appeared in Kirby Super Star Ultra, but Marx was in zombified form. He was called Marx Soul.
