Through its nose, it sucks in the emanations produced by people and Pokémon when they feel annoyed. It thrives off this negative energy. (Impidimp)
The six of them work together as one Pokémon. Teamwork is also their battle strategy, and they constantly change their formation as they fight. (Falinks)
Never touch its shadowlike body, or you’ll be shown the horrific memories behind the picture carved into it. (Runerigus)