Skele-pig is a zombie pigman who barely survived an encounter with Wither, the boss of the nether. Once Wemnix, along with Ninjapower 3.0 and She-ve killed the Wither, Skele-pig was free to follow Wemnix into the overworld and live with him. He barely has any resemblance to a zombie pigman, I know. That is because he was changed by the wither to turn his skin green, and the journey back to the portal caused him to lose some of said green skin. But he is now a skin on PMC! GG bro.