Its cry sounds like an incantation. It is said the cry may rarely be imbued with happiness-giving power.
Its cries sound like incantations to torment the foe. It appears where you least expect it.
The incantations Mismagius chants can ward against misfortune, so a custom exists of inviting it into one’s home. Incur the Pokémon’s displeasure, however, and disaster will surely ensue.