Pigmen are the only mob that does not spawn naturally with NetherX, and the one you

Pigmen in a nether brick pen.

would most likely want to meet. They are created by throwing Potions of Weakness on naturally spawning Zombie Pigmen, and then giving them a Golden Carrot will start the conversion progress into Pigmen (there is a glitch to where this doesn't work with zombie pigmen spawned through a mob egg). Pigmen will attack any agressive mob except creepers, and are very useful for defending your house. Zombie Pigmen now have a chance of dropping carrots, so you don't need to leave the Nether to obtain any anymore. You can also throw them tools and armor, which they'll pick up and use, if you want to buff them up.

HP: 28

Drops: Porkchops