npcblacklist.yml
This is the default NPC blacklist.
types: lists all the mob types that players cannot create.
names: lists all the names that players cannot name their merchants.
The blacklist does not affect Admin commands.
The following is the default blacklist.yml file:
types: EnderDragon, Enderman, Giant, IronGolem, Silverfish, Wither, Bat names: Notch