Pigmans that can be get by throwing a Splash Potion of Weakness at a zombie pigman, then give it a Golden Apple and wait some time, like zombie villagers-->villagers. And they can be infected and turned into zombie pigmans agian.

They can spawn in nether in a outpost with gold armor and tools. You can be awable making the outpost being your enemy, or your friends, trading with them will make theme friendly, killing them will make them to angry enemies.
The will have pig there and some will being ridding on them.

They will fight blazes and run away from and be attacked by zombie, zombie villagers and zombie pigman.

They will exist in baby form, baby zombie pigman will exist too.

You will be awable to trade with theme, you will not be awable to get diamond or iron armor and tools, but you will be awable to get gold tools and armor.

They will got a gold golem that's defends theme.

The outpost will be made by netherbricks. And they will have unactiv portal and carrotfarms.