Franken Zombie is the first boss of Makaimura for Wonderswan, a hideous Frankenstein-like undead beast wearing earrings.
He has three attacks. His first attack is spiting goo balls at Arthur in quantities of two or three of them will be spit your way a few times. His second attack is spitting three bouncing goo balls which ricochet on the ground., which must be jumping over in order to dodge them. Finally, he'll jump at Arthur trying to crush you. Despite these attack patterns, he is a rather easy boss. As his weak point is his head, aiming for it in most of his attacks attacks will quickly dispose of him.