Pocket Nightmares are rare random enemies. Some of their stats operate differently from other creatures, and do not use many of the standard systems in place. Look up the What Are Their Limitations? section for more details on that.
Unless owned by a player, Pocket Nightmares will vanish when defeated in battle.
Visit the Pocket Nightmares Expansion lesson for more details.
Pocket Nightmares are incapable of engaging in the following standard systems: